Btrfs is young and promising file system with many great features.

Unfortunately Btrfs is also a very sophisticated file system with little experience accumulated by the industry because Btrfs is still considered experimental.

Btrfs have so may features and such a huge code base that it will remain experimental for a long time.

However deployment of any technology is a matter of testing and trials. For example XFS file system is mature and stable yet there are number of confirmed cases of data loss while other file systems shown to be more reliable in situations where XFS fails.

There are several cases for Btrfs. Data integrity is one of the advantages because Btrfs does automatic checksumming for data. Silent data corruption is a serious risk for any important data and we need all the help that file system can offer to protect from such damage and/or detect corruption early.

Scalability is another serious reason. Btrfs uses smaller memory footprint comparing to XFS and ZFS. Operating system might be operating with limited RAM so it is critical for file system to be able to work with large file systems effectively without using too much memory.

Due to built-in compression Btrfs may be faster and more space efficient on operations with compressible data.

Online defragmentation requires a bit of scripting comparing to ext4 but can be done safely while other applications are working.

Is Btrfs already stable enough to replace ext4 if only basic functionality (no RAID-like features) is used? Apparently Btrfs online defragment and resize features are already quite stable. However our testing revealed slowdown on concurrent access and a number of kernel warnings and crashes.

Settings and benchmarks

Some comparative benchmarks are available from our [[ext4 external journal benchmarks|fs_ext4_external_journal]].

Here we decided to try something different. We archived a large rsnapshot tree with nearly million folders and over 12 million files/hardlinks. The challenge was to avoid bottlenecks on extraction: GNU tar uses single-threaded compression so we piped pixz and tar to achieve better performance. Then GNU tar itself became bottleneck — it was extracting slower and slower utilising 1 CPU up to 100% while producing little IO. Replacing tar with bsdtar fixed the bottleneck problem and accelerated extraction of ~300 GiB archive to ext4 from 2322 minutes (tar) to 203 minutes (bsdtar) — 11 times faster. We used Intel Core2 Quad CPU Q9450 with 8 GiB of RAM for testing. Archive was placed to dedicated HDD and extraction was done to another dedicated HDD.

# compress
sudo bsdtar -c -f- --totals --format=gnutar rsnapshot | pixz -t > /mnt/tmp1/rsnap-tst.tar.xz

# extract
sudo pixz -d -t < /mnt/tmp1/rsnap-tst.tar.xz | bsdtar -x -f- --totals -S

Total time measured for extraction and other tests include sync command given immediately after extraction. Caches were dropped before each test.

Tests were conducted on "Linux 3.7-trunk-amd64 SMP Debian 3.7.3-1~experimental.1 x86_64 GNU/Linux".

In-place ext4 conversion

time sudo btrfs-convert /dev/disk/by-id/ata-Hitachi_HDS721075KLA330_GTF202P8H97KDF-part1
creating btrfs metadata.
creating ext2fs image file.
cleaning up system chunk.
conversion complete.

real    1656m36.040s
user    315m12.220s
sys     23m59.376s

In-place conversion read all the data in partition and slowly written ~50% of it. We expected it to finish faster as with such timing it is not clear if conversion is faster than backup/restore. In any case backup/restore would be safer especially if conversion is interrupted.

After conversion integrity of all files was checked: no corruption detected.


Extraction

Extracting ~300 G tar.xz archive (tota size of extracted data is ~500 G).

file system effective mount options execution time, min. (less is better)
btrfs rw,relatime,space_cache
883 (sys/79)
btrfs rw,relatime,compress=lzo,space_cache
962 (sys/80)
btrfs rw,relatime,compress=lzo,nospace_cache
853 (sys/73)
ext4 rw,relatime,journal_checksum,journal_async_commit,data=ordered
200 (sys/34)
ext4 rw,relatime,journal_checksum,data=ordered
203 (sys/33)
xfs rw,relatime,attr2,inode64,noquota
269 (sys/35)
nilfs2* rw,relatime
207 (sys/48)

Btrfs is the slowest (~4 times slower than others) but the worst thing is that extraction were getting progressively slower only on Btrfs (see below).


Walking directory tree

file system effective mount options execution time, min. (less is better)
btrfs rw,relatime,space_cache
73 (sys/3)
btrfs rw,relatime,compress=lzo,space_cache
66 (sys/3)
btrfs rw,relatime,compress=lzo,nospace_cache
68 (sys/3)
ext4 rw,relatime,journal_checksum,journal_async_commit,data=ordered
24 (sys/2)
ext4 rw,relatime,journal_checksum,data=ordered
24 (sys/2)
xfs rw,relatime,attr2,inode64,noquota
11 (sys/2)
nilfs2* rw,relatime
10 (sys/2)

Deleting files

file system effective mount options execution time, min. (less is better)
btrfs rw,relatime,space_cache
744 (sys/49)
btrfs rw,relatime,compress=lzo,space_cache
828 (sys/49)
btrfs rw,relatime,compress=lzo,nospace_cache
664 (sys/45)
ext4 rw,relatime,journal_checksum,journal_async_commit,data=ordered
66 (sys/8)
ext4 rw,relatime,journal_checksum,data=ordered
65 (sys/8)
xfs rw,relatime,attr2,inode64,noquota
36 (sys/11)
nilfs2* rw,relatime
40 (sys/9)

Btrfs is much worse than others in this test: it is actually so bad that it took nearly as much time to delete all extracted files as to exctract them. Slowdown effect is reversed: deletion starts very slow then slowly accelerated as the number of remaining files decreases.

free space graph during ext4 and Btrfs tests

In the above graph (left to right): at 4:15 extraction to ext4 began (total 200 min.); when it reached the lowest mark between 7:00 and 8:00 the directory walk began (~28 min. total), followed by deletion of all files (77 min.). When everything was deleted one large file was copied to ext4 partition and then removed. By 11:00 ext4 test was over and Btrfs test has began. Extraction took 1101 min. (over 18 hours vs. ~3 hours on ext4). Directory walk took ~77 min. so around 7:00 deletion of files began. Only 798 min. (over 13 hours) later all the files were removed and exactly at 20:00 copying of one big file started. (Graph begins with mount and ends with umount; free space sampling interval is 3 min.).


Copy one large file (~300 GiB)

file system effective mount options execution time, min. (less is better)
btrfs rw,relatime,space_cache
64 (sys/7)
btrfs rw,relatime,compress=lzo,space_cache
66 (sys/7)
btrfs rw,relatime,compress=lzo,nospace_cache
63 (sys/7)
ext4 rw,relatime,journal_checksum,journal_async_commit,data=ordered
89 (sys/9)
ext4 rw,relatime,journal_checksum,data=ordered
86 (sys/9)
xfs rw,relatime,attr2,inode64,noquota
63 (sys/7)
nilfs2* rw,relatime
130 (sys/13)

Delete one large file (~300 GiB)

file system effective mount options execution time, sec. (less is better)
btrfs rw,relatime,space_cache
27 (sys/8)
btrfs rw,relatime,compress=lzo,space_cache
30 (sys/9)
btrfs rw,relatime,compress=lzo,nospace_cache
25 (sys/8)
ext4 rw,relatime,journal_checksum,journal_async_commit,data=ordered
7 (sys/0)
ext4 rw,relatime,journal_checksum,data=ordered
4 (sys/0)
xfs rw,relatime,attr2,inode64,noquota
1 (sys/0)
nilfs2* rw,relatime
475 (sys/178)

Btrfs test with "inode_cache" was dismissed when deleting large file was interrupted ~5 hours later by rebooting (rm process was impossible to terminate using kill -9).


Notes / Caveats

  • NILFS2 times are ideal as the measurements were taken without nilfs_cleanerd (background cleaning) running.

  • Btrfs autodefrag mount option can not be disabled without umount.

  • Default Btrfs mount options are far from optimal. Concurrent access to Btrfs was badly lagging, especially over NFS4. "thread_pool=16" mount option helped to relieve this problem a little.

  • btrfs-cache still works on partition after umount for ~5..10 min. (in some cases reading up to 300 MiB). This is causing unexpected delays during shutdown.

  • It takes unusually long time to mount large Btrfs file system (~5...15 min.), especially if nospace_cache mount option is used (default space_cache is faster).


Kernel errors

We tried to use larger Btrfs file system and noticed the following Linux kernel errors:

Feb 27 11:05:43 debblab kernel: [    0.000000] Linux version 3.7-trunk-amd64 (debian-kernel@lists.debian.org) (gcc version 4.7.2 (Debian 4.7.2-5) ) #1 SMP Debian 3.7.8-1~experimental.1

Feb 27 05:51:03 debblab kernel: [485699.330087] ------------[ cut here ]------------
Feb 27 05:51:03 debblab kernel: [485699.330132] WARNING: at /build/buildd-linux_3.7.8-1~experimental.1-amd64-3TxQRS/linux-3.7.8/fs/btrfs/inode.c:2165 btrfs_orphan_commit_root+0xce/0xe8 [btrfs]()
Feb 27 05:51:03 debblab kernel: [485699.330135] Hardware name: S3420GP
Feb 27 05:51:03 debblab kernel: [485699.330137] Modules linked in: sha256_generic cbc dm_crypt ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables parport_pc ppdev lp parport cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_stats fuse nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc bonding loop snd_hda_codec_hdmi joydev snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_seq iTCO_wdt coretemp snd_seq_device iTCO_vendor_support snd_timer kvm_intel evdev snd i2c_i801 fglrx(PO) lpc_ich mfd_core i2c_core soundcore kvm i7core_edac edac_core crc32c_intel pcspkr acpi_cpufreq mperf processor button thermal_sys ext4 crc16 jbd2 mbcache btrfs crc32c libcrc32c zlib_deflate dm_mod raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq linear md_mod ses hid_generic usbhid hid sg enclosure sd_mod crc_t10dif microcode ehci_hcd ahci libahci megaraid_sas usbcore usb_common libata scsi_mod e1000e
Feb 27 05:51:03 debblab kernel: [485699.330236] Pid: 5005, comm: btrfs-transacti Tainted: P        W  O 3.7-trunk-amd64 #1 Debian 3.7.8-1~experimental.1
Feb 27 05:51:03 debblab kernel: [485699.330239] Call Trace:
Feb 27 05:51:03 debblab kernel: [485699.330248]  [<ffffffff8103ced4>] ? warn_slowpath_common+0x76/0x8a
Feb 27 05:51:03 debblab kernel: [485699.330276]  [<ffffffffa01d7e9e>] ? btrfs_orphan_commit_root+0xce/0xe8 [btrfs]
Feb 27 05:51:03 debblab kernel: [485699.330301]  [<ffffffffa01d1e2f>] ? commit_fs_roots.isra.24+0x96/0x142 [btrfs]
Feb 27 05:51:03 debblab kernel: [485699.330329]  [<ffffffffa0210980>] ? btrfs_scrub_pause+0xda/0xe9 [btrfs]
Feb 27 05:51:03 debblab kernel: [485699.330335]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Feb 27 05:51:03 debblab kernel: [485699.330378]  [<ffffffffa01d327b>] ? btrfs_commit_transaction+0x440/0x93a [btrfs]
Feb 27 05:51:03 debblab kernel: [485699.330385]  [<ffffffff81057a97>] ? abort_exclusive_wait+0x79/0x79
Feb 27 05:51:03 debblab kernel: [485699.330410]  [<ffffffffa01d3db4>] ? start_transaction+0x32e/0x3cb [btrfs]
Feb 27 05:51:03 debblab kernel: [485699.330415]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Feb 27 05:51:03 debblab kernel: [485699.330440]  [<ffffffffa01cceff>] ? transaction_kthread+0xe0/0x183 [btrfs]
Feb 27 05:51:03 debblab kernel: [485699.330464]  [<ffffffffa01cce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Feb 27 05:51:03 debblab kernel: [485699.330489]  [<ffffffffa01cce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Feb 27 05:51:03 debblab kernel: [485699.330495]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Feb 27 05:51:03 debblab kernel: [485699.330500]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 27 05:51:03 debblab kernel: [485699.330507]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Feb 27 05:51:03 debblab kernel: [485699.330512]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 27 05:51:03 debblab kernel: [485699.330516] ---[ end trace 4b4fffd0446e98b8 ]---


Feb 27 11:40:01 debblab kernel: [ 2075.604396] ------------[ cut here ]------------
Feb 27 11:40:01 debblab kernel: [ 2075.604440] WARNING: at /build/buildd-linux_3.7.8-1~experimental.1-amd64-3TxQRS/linux-3.7.8/fs/btrfs/inode.c:2165 btrfs_orphan_commit_root+0xce/0xe8 [btrfs]()
Feb 27 11:40:01 debblab kernel: [ 2075.604444] Hardware name: S3420GP
Feb 27 11:40:01 debblab kernel: [ 2075.604446] Modules linked in: sha256_generic cbc dm_crypt ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables parport_pc ppdev lp parport cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_stats fuse nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc bonding loop joydev snd_hda_codec_hdmi coretemp fglrx(PO) kvm_intel iTCO_wdt iTCO_vendor_support kvm snd_hda_intel evdev snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_seq crc32c_intel snd_seq_device lpc_ich snd_timer mfd_core i2c_i801 i7core_edac i2c_core snd pcspkr edac_core soundcore acpi_cpufreq mperf processor button thermal_sys ext4 crc16 jbd2 mbcache btrfs crc32c libcrc32c zlib_deflate dm_mod raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq linear md_mod hid_generic usbhid hid sg ses sd_mod enclosure crc_t10dif megaraid_sas microcode ahci libahci ehci_hcd e1000e libata scsi_mod usbcore usb_common
Feb 27 11:40:01 debblab kernel: [ 2075.604543] Pid: 4997, comm: btrfs-transacti Tainted: P           O 3.7-trunk-amd64 #1 Debian 3.7.8-1~experimental.1
Feb 27 11:40:01 debblab kernel: [ 2075.604546] Call Trace:
Feb 27 11:40:01 debblab kernel: [ 2075.604555]  [<ffffffff8103ced4>] ? warn_slowpath_common+0x76/0x8a
Feb 27 11:40:01 debblab kernel: [ 2075.604583]  [<ffffffffa0242e9e>] ? btrfs_orphan_commit_root+0xce/0xe8 [btrfs]
Feb 27 11:40:01 debblab kernel: [ 2075.604608]  [<ffffffffa023ce2f>] ? commit_fs_roots.isra.24+0x96/0x142 [btrfs]
Feb 27 11:40:01 debblab kernel: [ 2075.604636]  [<ffffffffa027b980>] ? btrfs_scrub_pause+0xda/0xe9 [btrfs]
Feb 27 11:40:01 debblab kernel: [ 2075.604642]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Feb 27 11:40:01 debblab kernel: [ 2075.604668]  [<ffffffffa023e27b>] ? btrfs_commit_transaction+0x440/0x93a [btrfs]
Feb 27 11:40:01 debblab kernel: [ 2075.604674]  [<ffffffff81057a97>] ? abort_exclusive_wait+0x79/0x79
Feb 27 11:40:01 debblab kernel: [ 2075.604700]  [<ffffffffa023edb4>] ? start_transaction+0x32e/0x3cb [btrfs]
Feb 27 11:40:01 debblab kernel: [ 2075.604705]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Feb 27 11:40:01 debblab kernel: [ 2075.604729]  [<ffffffffa0237eff>] ? transaction_kthread+0xe0/0x183 [btrfs]
Feb 27 11:40:01 debblab kernel: [ 2075.604754]  [<ffffffffa0237e1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Feb 27 11:40:01 debblab kernel: [ 2075.604778]  [<ffffffffa0237e1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Feb 27 11:40:01 debblab kernel: [ 2075.604784]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Feb 27 11:40:01 debblab kernel: [ 2075.604789]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 27 11:40:01 debblab kernel: [ 2075.604796]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Feb 27 11:40:01 debblab kernel: [ 2075.604801]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 27 11:40:01 debblab kernel: [ 2075.604804] ---[ end trace df92969bbba1a442 ]---

Crash:

Feb 27 12:52:01 debblab kernel: [ 6393.649988] Oops: 0000 [#1] SMP 
Feb 27 12:52:01 debblab kernel: [ 6393.649991] Modules linked in: sha256_generic cbc dm_crypt ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables parport_pc ppdev lp parport cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_stats fuse nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc bonding loop joydev snd_hda_codec_hdmi coretemp fglrx(PO) kvm_intel iTCO_wdt iTCO_vendor_support kvm snd_hda_intel evdev snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_seq crc32c_intel snd_seq_device lpc_ich snd_timer mfd_core i2c_i801 i7core_edac i2c_core snd pcspkr edac_core soundcore acpi_cpufreq mperf processor button thermal_sys ext4 crc16 jbd2 mbcache btrfs crc32c libcrc32c zlib_deflate dm_mod raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq linear md_mod hid_generic usbhid hid sg ses sd_mod enclosure crc_t10dif megaraid_sas microcode ahci libahci ehci_hcd e1000e libata scsi_mod usbcore usb_common
Feb 27 12:52:01 debblab kernel: [ 6393.650037] CPU 3 
Feb 27 12:52:01 debblab kernel: [ 6393.650040] Pid: 18969, comm: mc Tainted: P        W  O 3.7-trunk-amd64 #1 Debian 3.7.8-1~experimental.1 Intel Corporation S3420GP/S3420GP
Feb 27 12:52:01 debblab kernel: [ 6393.650043] RIP: 0010:[<ffffffffa02285b4>]  [<ffffffffa02285b4>] block_rsv_release_bytes+0x1f/0x10d [btrfs]
Feb 27 12:52:01 debblab kernel: [ 6393.650052] RSP: 0018:ffff8802eac95dd8  EFLAGS: 00010202
Feb 27 12:52:01 debblab kernel: [ 6393.650053] RAX: 0000000000000000 RBX: 0000000000018000 RCX: 0000000000018000
Feb 27 12:52:01 debblab kernel: [ 6393.650055] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000018
Feb 27 12:52:01 debblab kernel: [ 6393.650056] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
Feb 27 12:52:01 debblab kernel: [ 6393.650057] R10: 0000000000000000 R11: 0000000000000004 R12: 0000000000000000
Feb 27 12:52:01 debblab kernel: [ 6393.650059] R13: ffff880443699450 R14: ffff880429334000 R15: 0000000000000018
Feb 27 12:52:01 debblab kernel: [ 6393.650061] FS:  00007f0c627f0720(0000) GS:ffff88045fcc0000(0000) knlGS:0000000000000000
Feb 27 12:52:01 debblab kernel: [ 6393.650062] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Feb 27 12:52:01 debblab kernel: [ 6393.650064] CR2: 0000000000000010 CR3: 00000002e6685000 CR4: 00000000000007e0
Feb 27 12:52:01 debblab kernel: [ 6393.650065] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Feb 27 12:52:01 debblab kernel: [ 6393.650067] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Feb 27 12:52:01 debblab kernel: [ 6393.650068] Process mc (pid: 18969, threadinfo ffff8802eac94000, task ffff8804313e31c0)
Feb 27 12:52:01 debblab kernel: [ 6393.650069] Stack:
Feb 27 12:52:01 debblab kernel: [ 6393.650070]  ffff880443699450 ffff8801e5637208 ffff880443699000 ffff8802592a0098
Feb 27 12:52:01 debblab kernel: [ 6393.650073]  ffff880443699450 00000000ffffffff 00000000ffffffff ffffffffa024306b
Feb 27 12:52:01 debblab kernel: [ 6393.650076]  0000000000000078 ffff880443699000 ffff8801e5637208 ffff880318f10c80
Feb 27 12:52:01 debblab kernel: [ 6393.650078] Call Trace:
Feb 27 12:52:01 debblab kernel: [ 6393.650092]  [<ffffffffa024306b>] ? btrfs_orphan_del+0x86/0xa0 [btrfs]
Feb 27 12:52:01 debblab kernel: [ 6393.650105]  [<ffffffffa0246cfd>] ? btrfs_evict_inode+0x217/0x29d [btrfs]
Feb 27 12:52:01 debblab kernel: [ 6393.650109]  [<ffffffff8111a9af>] ? evict+0xa3/0x153
Feb 27 12:52:01 debblab kernel: [ 6393.650112]  [<ffffffff811121df>] ? do_unlinkat+0xf5/0x13d
Feb 27 12:52:01 debblab kernel: [ 6393.650115]  [<ffffffff8104e0f3>] ? sys_rt_sigaction+0x62/0x94
Feb 27 12:52:01 debblab kernel: [ 6393.650120]  [<ffffffff8137dba9>] ? system_call_fastpath+0x16/0x1b
Feb 27 12:52:01 debblab kernel: [ 6393.650121] Code: 5b 5b 5d 41 5c 41 5d 41 5e 41 5f c3 41 57 4c 8d 7e 18 41 56 49 89 fe 4c 89 ff 41 55 41 54 49 89 d4 55 48 89 f5 53 48 89 cb 41 55 <4c> 8b 6e 10 e8 09 f9 ff ff 48 8b 45 00 48 83 fb ff 48 8b 55 08 
Feb 27 12:52:01 debblab kernel: [ 6393.650149]  RSP <ffff8802eac95dd8>
Feb 27 12:52:01 debblab kernel: [ 6393.650150] CR2: 0000000000000010
Feb 27 12:52:01 debblab kernel: [ 6393.650152] ---[ end trace df92969bbba1a443 ]---

mount after crash:

Feb 27 13:41:16 debblab kernel: [   52.349951] btrfs: use lzo compression
Feb 27 13:41:16 debblab kernel: [   52.349957] btrfs: disk space caching is enabled
Feb 27 13:46:24 debblab kernel: [  360.361296] btrfs-transacti D ffff88045fc13b80     0  5007      2 0x00000000
Feb 27 13:46:24 debblab kernel: [  360.361302]  ffff88044b5ed180 0000000000000046 0000000000000000 ffffffff816133f0
Feb 27 13:46:24 debblab kernel: [  360.361309]  0000000000013b80 ffff8804239c3fd8 ffff8804239c3fd8 ffff88044b5ed180
Feb 27 13:46:24 debblab kernel: [  360.361314]  00000000ffffffff 7fffffffffffffff ffff880424483a18 ffff8804258d8ef0
Feb 27 13:46:24 debblab kernel: [  360.361320] Call Trace:
Feb 27 13:46:24 debblab kernel: [  360.361331]  [<ffffffff81376e23>] ? schedule_timeout+0x2c/0x123
Feb 27 13:46:24 debblab kernel: [  360.361337]  [<ffffffff81377163>] ? mutex_lock+0xd/0x2d
Feb 27 13:46:24 debblab kernel: [  360.361342]  [<ffffffff813788bd>] ? _raw_spin_lock_irqsave+0x14/0x35
Feb 27 13:46:24 debblab kernel: [  360.361349]  [<ffffffff8105799d>] ? prepare_to_wait+0x69/0x72
Feb 27 13:46:24 debblab kernel: [  360.361391]  [<ffffffffa0223105>] ? btrfs_commit_transaction+0x2ca/0x93a [btrfs]
Feb 27 13:46:24 debblab kernel: [  360.361396]  [<ffffffff81057a97>] ? abort_exclusive_wait+0x79/0x79
Feb 27 13:46:24 debblab kernel: [  360.361423]  [<ffffffffa0223db4>] ? start_transaction+0x32e/0x3cb [btrfs]
Feb 27 13:46:24 debblab kernel: [  360.361428]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Feb 27 13:46:24 debblab kernel: [  360.361453]  [<ffffffffa021ceff>] ? transaction_kthread+0xe0/0x183 [btrfs]
Feb 27 13:46:24 debblab kernel: [  360.361477]  [<ffffffffa021ce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Feb 27 13:46:24 debblab kernel: [  360.361502]  [<ffffffffa021ce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Feb 27 13:46:24 debblab kernel: [  360.361507]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Feb 27 13:46:24 debblab kernel: [  360.361513]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 27 13:46:24 debblab kernel: [  360.361519]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Feb 27 13:46:24 debblab kernel: [  360.361524]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 27 13:48:24 debblab kernel: [  480.297287] btrfs-transacti D ffff88045fc13b80     0  5007      2 0x00000000
Feb 27 13:48:24 debblab kernel: [  480.297294]  ffff88044b5ed180 0000000000000046 0000000000000000 ffffffff816133f0
Feb 27 13:48:24 debblab kernel: [  480.297300]  0000000000013b80 ffff8804239c3fd8 ffff8804239c3fd8 ffff88044b5ed180
Feb 27 13:48:24 debblab kernel: [  480.297306]  00000000ffffffff 7fffffffffffffff ffff880424483a18 ffff8804258d8ef0
Feb 27 13:48:24 debblab kernel: [  480.297311] Call Trace:
Feb 27 13:48:24 debblab kernel: [  480.297323]  [<ffffffff81376e23>] ? schedule_timeout+0x2c/0x123
Feb 27 13:48:24 debblab kernel: [  480.297329]  [<ffffffff81377163>] ? mutex_lock+0xd/0x2d
Feb 27 13:48:24 debblab kernel: [  480.297334]  [<ffffffff813788bd>] ? _raw_spin_lock_irqsave+0x14/0x35
Feb 27 13:48:24 debblab kernel: [  480.297341]  [<ffffffff8105799d>] ? prepare_to_wait+0x69/0x72
Feb 27 13:48:24 debblab kernel: [  480.297382]  [<ffffffffa0223105>] ? btrfs_commit_transaction+0x2ca/0x93a [btrfs]
Feb 27 13:48:24 debblab kernel: [  480.297388]  [<ffffffff81057a97>] ? abort_exclusive_wait+0x79/0x79
Feb 27 13:48:24 debblab kernel: [  480.297414]  [<ffffffffa0223db4>] ? start_transaction+0x32e/0x3cb [btrfs]
Feb 27 13:48:24 debblab kernel: [  480.297420]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Feb 27 13:48:24 debblab kernel: [  480.297444]  [<ffffffffa021ceff>] ? transaction_kthread+0xe0/0x183 [btrfs]
Feb 27 13:48:24 debblab kernel: [  480.297468]  [<ffffffffa021ce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Feb 27 13:48:24 debblab kernel: [  480.297493]  [<ffffffffa021ce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Feb 27 13:48:24 debblab kernel: [  480.297498]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Feb 27 13:48:24 debblab kernel: [  480.297504]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 27 13:48:24 debblab kernel: [  480.297510]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Feb 27 13:48:24 debblab kernel: [  480.297515]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 27 13:50:24 debblab kernel: [  600.233089] btrfs-transacti D ffff88045fc13b80     0  5007      2 0x00000000
Feb 27 13:50:24 debblab kernel: [  600.233092]  ffff88044b5ed180 0000000000000046 0000000000000000 ffffffff816133f0
Feb 27 13:50:24 debblab kernel: [  600.233094]  0000000000013b80 ffff8804239c3fd8 ffff8804239c3fd8 ffff88044b5ed180
Feb 27 13:50:24 debblab kernel: [  600.233097]  00000000ffffffff 7fffffffffffffff ffff880424483a18 ffff8804258d8ef0
Feb 27 13:50:24 debblab kernel: [  600.233099] Call Trace:
Feb 27 13:50:24 debblab kernel: [  600.233106]  [<ffffffff81376e23>] ? schedule_timeout+0x2c/0x123
Feb 27 13:50:24 debblab kernel: [  600.233108]  [<ffffffff81377163>] ? mutex_lock+0xd/0x2d
Feb 27 13:50:24 debblab kernel: [  600.233110]  [<ffffffff813788bd>] ? _raw_spin_lock_irqsave+0x14/0x35
Feb 27 13:50:24 debblab kernel: [  600.233114]  [<ffffffff8105799d>] ? prepare_to_wait+0x69/0x72
Feb 27 13:50:24 debblab kernel: [  600.233137]  [<ffffffffa0223105>] ? btrfs_commit_transaction+0x2ca/0x93a [btrfs]
Feb 27 13:50:24 debblab kernel: [  600.233139]  [<ffffffff81057a97>] ? abort_exclusive_wait+0x79/0x79
Feb 27 13:50:24 debblab kernel: [  600.233150]  [<ffffffffa0223db4>] ? start_transaction+0x32e/0x3cb [btrfs]
Feb 27 13:50:24 debblab kernel: [  600.233153]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Feb 27 13:50:24 debblab kernel: [  600.233163]  [<ffffffffa021ceff>] ? transaction_kthread+0xe0/0x183 [btrfs]
Feb 27 13:50:24 debblab kernel: [  600.233173]  [<ffffffffa021ce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Feb 27 13:50:24 debblab kernel: [  600.233183]  [<ffffffffa021ce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Feb 27 13:50:24 debblab kernel: [  600.233185]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Feb 27 13:50:24 debblab kernel: [  600.233187]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 27 13:50:24 debblab kernel: [  600.233191]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Feb 27 13:50:24 debblab kernel: [  600.233193]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 27 13:52:24 debblab kernel: [  720.169132] btrfs-transacti D ffff88045fc13b80     0  5007      2 0x00000000
Feb 27 13:52:24 debblab kernel: [  720.169138]  ffff88044b5ed180 0000000000000046 0000000000000000 ffffffff816133f0
Feb 27 13:52:24 debblab kernel: [  720.169145]  0000000000013b80 ffff8804239c3fd8 ffff8804239c3fd8 ffff88044b5ed180
Feb 27 13:52:24 debblab kernel: [  720.169150]  00000000ffffffff 7fffffffffffffff ffff880424483a18 ffff8804258d8ef0
Feb 27 13:52:24 debblab kernel: [  720.169156] Call Trace:
Feb 27 13:52:24 debblab kernel: [  720.169167]  [<ffffffff81376e23>] ? schedule_timeout+0x2c/0x123
Feb 27 13:52:24 debblab kernel: [  720.169173]  [<ffffffff81377163>] ? mutex_lock+0xd/0x2d
Feb 27 13:52:24 debblab kernel: [  720.169178]  [<ffffffff813788bd>] ? _raw_spin_lock_irqsave+0x14/0x35
Feb 27 13:52:24 debblab kernel: [  720.169185]  [<ffffffff8105799d>] ? prepare_to_wait+0x69/0x72
Feb 27 13:52:24 debblab kernel: [  720.169227]  [<ffffffffa0223105>] ? btrfs_commit_transaction+0x2ca/0x93a [btrfs]
Feb 27 13:52:24 debblab kernel: [  720.169232]  [<ffffffff81057a97>] ? abort_exclusive_wait+0x79/0x79
Feb 27 13:52:24 debblab kernel: [  720.169258]  [<ffffffffa0223db4>] ? start_transaction+0x32e/0x3cb [btrfs]
Feb 27 13:52:24 debblab kernel: [  720.169265]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Feb 27 13:52:24 debblab kernel: [  720.169289]  [<ffffffffa021ceff>] ? transaction_kthread+0xe0/0x183 [btrfs]
Feb 27 13:52:24 debblab kernel: [  720.169314]  [<ffffffffa021ce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Feb 27 13:52:24 debblab kernel: [  720.169338]  [<ffffffffa021ce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Feb 27 13:52:24 debblab kernel: [  720.169343]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Feb 27 13:52:24 debblab kernel: [  720.169349]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 27 13:52:24 debblab kernel: [  720.169355]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Feb 27 13:52:24 debblab kernel: [  720.169360]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 27 13:56:24 debblab kernel: [  960.040958] mount           D ffff88045fc93b80     0  4895   4763 0x00000000
Feb 27 13:56:24 debblab kernel: [  960.040961]  ffff88044bb107c0 0000000000000086 0000000000000292 ffff88044f0b58c0
Feb 27 13:56:24 debblab kernel: [  960.040963]  0000000000013b80 ffff880428307fd8 ffff880428307fd8 ffff88044bb107c0
Feb 27 13:56:24 debblab kernel: [  960.040966]  0000000000000246 ffff8804258d8e70 ffff880428307a40 ffff8804258d8f08
Feb 27 13:56:24 debblab kernel: [  960.040969] Call Trace:
Feb 27 13:56:24 debblab kernel: [  960.040997]  [<ffffffffa0221ca1>] ? wait_for_commit.isra.20+0x6b/0x81 [btrfs]
Feb 27 13:56:24 debblab kernel: [  960.041001]  [<ffffffff81057a97>] ? abort_exclusive_wait+0x79/0x79
Feb 27 13:56:24 debblab kernel: [  960.041015]  [<ffffffffa0222f62>] ? btrfs_commit_transaction+0x127/0x93a [btrfs]
Feb 27 13:56:24 debblab kernel: [  960.041018]  [<ffffffff81057a97>] ? abort_exclusive_wait+0x79/0x79
Feb 27 13:56:24 debblab kernel: [  960.041030]  [<ffffffffa024e3eb>] ? btrfs_recover_log_trees+0x2b1/0x2dd [btrfs]
Feb 27 13:56:24 debblab kernel: [  960.041042]  [<ffffffffa024b9f8>] ? replay_one_extent+0x485/0x485 [btrfs]
Feb 27 13:56:24 debblab kernel: [  960.041053]  [<ffffffffa0221853>] ? open_ctree+0x13bd/0x1742 [btrfs]
Feb 27 13:56:24 debblab kernel: [  960.041056]  [<ffffffff811c2643>] ? ida_get_new_above+0x16c/0x17d
Feb 27 13:56:24 debblab kernel: [  960.041064]  [<ffffffffa0201f10>] ? get_default_root+0x1a9/0x1a9 [btrfs]
Feb 27 13:56:24 debblab kernel: [  960.041071]  [<ffffffffa0203ebe>] ? btrfs_mount+0x37e/0x4ae [btrfs]
Feb 27 13:56:24 debblab kernel: [  960.041075]  [<ffffffff810f4c87>] ? alloc_pages_current+0xb1/0xcb
Feb 27 13:56:24 debblab kernel: [  960.041082]  [<ffffffff8110b1aa>] ? mount_fs+0x61/0x143
Feb 27 13:56:24 debblab kernel: [  960.041086]  [<ffffffff8111decf>] ? vfs_kern_mount+0x62/0xe3
Feb 27 13:56:24 debblab kernel: [  960.041089]  [<ffffffff8111e436>] ? do_kern_mount+0x49/0xdd
Feb 27 13:56:24 debblab kernel: [  960.041092]  [<ffffffff8111fcf6>] ? do_mount+0x68c/0x712
Feb 27 13:56:24 debblab kernel: [  960.041094]  [<ffffffff8111f5d2>] ? copy_mount_options+0xba/0x127
Feb 27 13:56:24 debblab kernel: [  960.041097]  [<ffffffff8111fe01>] ? sys_mount+0x85/0xbf
Feb 27 13:56:24 debblab kernel: [  960.041100]  [<ffffffff8137dba9>] ? system_call_fastpath+0x16/0x1b
Feb 27 13:58:24 debblab kernel: [ 1079.976996] mount           D ffff88045fc93b80     0  4895   4763 0x00000000
Feb 27 13:58:24 debblab kernel: [ 1079.977002]  ffff88044bb107c0 0000000000000086 0000000000000292 ffff88044f0b58c0
Feb 27 13:58:24 debblab kernel: [ 1079.977009]  0000000000013b80 ffff880428307fd8 ffff880428307fd8 ffff88044bb107c0
Feb 27 13:58:24 debblab kernel: [ 1079.977014]  0000000000000246 ffff8804258d8e70 ffff880428307a40 ffff8804258d8f08
Feb 27 13:58:24 debblab kernel: [ 1079.977020] Call Trace:
Feb 27 13:58:24 debblab kernel: [ 1079.977063]  [<ffffffffa0221ca1>] ? wait_for_commit.isra.20+0x6b/0x81 [btrfs]
Feb 27 13:58:24 debblab kernel: [ 1079.977071]  [<ffffffff81057a97>] ? abort_exclusive_wait+0x79/0x79
Feb 27 13:58:24 debblab kernel: [ 1079.977097]  [<ffffffffa0222f62>] ? btrfs_commit_transaction+0x127/0x93a [btrfs]
Feb 27 13:58:24 debblab kernel: [ 1079.977103]  [<ffffffff81057a97>] ? abort_exclusive_wait+0x79/0x79
Feb 27 13:58:24 debblab kernel: [ 1079.977131]  [<ffffffffa024e3eb>] ? btrfs_recover_log_trees+0x2b1/0x2dd [btrfs]
Feb 27 13:58:24 debblab kernel: [ 1079.977158]  [<ffffffffa024b9f8>] ? replay_one_extent+0x485/0x485 [btrfs]
Feb 27 13:58:24 debblab kernel: [ 1079.977184]  [<ffffffffa0221853>] ? open_ctree+0x13bd/0x1742 [btrfs]
Feb 27 13:58:24 debblab kernel: [ 1079.977191]  [<ffffffff811c2643>] ? ida_get_new_above+0x16c/0x17d
Feb 27 13:58:24 debblab kernel: [ 1079.977208]  [<ffffffffa0201f10>] ? get_default_root+0x1a9/0x1a9 [btrfs]
Feb 27 13:58:24 debblab kernel: [ 1079.977224]  [<ffffffffa0203ebe>] ? btrfs_mount+0x37e/0x4ae [btrfs]
Feb 27 13:58:24 debblab kernel: [ 1079.977231]  [<ffffffff810f4c87>] ? alloc_pages_current+0xb1/0xcb
Feb 27 13:58:24 debblab kernel: [ 1079.977239]  [<ffffffff8110b1aa>] ? mount_fs+0x61/0x143
Feb 27 13:58:24 debblab kernel: [ 1079.977246]  [<ffffffff8111decf>] ? vfs_kern_mount+0x62/0xe3
Feb 27 13:58:24 debblab kernel: [ 1079.977253]  [<ffffffff8111e436>] ? do_kern_mount+0x49/0xdd
Feb 27 13:58:24 debblab kernel: [ 1079.977258]  [<ffffffff8111fcf6>] ? do_mount+0x68c/0x712
Feb 27 13:58:24 debblab kernel: [ 1079.977264]  [<ffffffff8111f5d2>] ? copy_mount_options+0xba/0x127
Feb 27 13:58:24 debblab kernel: [ 1079.977269]  [<ffffffff8111fe01>] ? sys_mount+0x85/0xbf
Feb 27 13:58:24 debblab kernel: [ 1079.977276]  [<ffffffff8137dba9>] ? system_call_fastpath+0x16/0x1b
Feb 27 14:00:15 debblab kernel: [ 1191.034126] btrfs: unlinked 3 orphans
Feb 27 14:00:15 debblab kernel: [ 1191.034131] btrfs: truncated 14 orphans


Feb 28 09:54:22 debblab kernel: [72801.913674] flush-btrfs-1   D ffff88045fc13b80     0  7374      2 0x00000000
Feb 28 09:54:22 debblab kernel: [72801.913677]  ffff88044f1f6740 0000000000000046 ffff880405ad9ca0 ffff88044b988100
Feb 28 09:54:22 debblab kernel: [72801.913680]  0000000000013b80 ffff880405ad9fd8 ffff880405ad9fd8 ffff88044f1f6740
Feb 28 09:54:22 debblab kernel: [72801.913682]  ffffffff81013789 ffff88045fc13b80 ffff88044f1f6740 ffff880405ad9ab0
Feb 28 09:54:22 debblab kernel: [72801.913685] Call Trace:
Feb 28 09:54:22 debblab kernel: [72801.913691]  [<ffffffff81013789>] ? read_tsc+0x5/0x14
Feb 28 09:54:22 debblab kernel: [72801.913695]  [<ffffffff810c15f1>] ? __lock_page+0x66/0x66
Feb 28 09:54:22 debblab kernel: [72801.913700]  [<ffffffff81378020>] ? io_schedule+0x56/0x6d
Feb 28 09:54:22 debblab kernel: [72801.913702]  [<ffffffff810c15f8>] ? sleep_on_page+0x7/0xc
Feb 28 09:54:22 debblab kernel: [72801.913705]  [<ffffffff81377082>] ? __wait_on_bit_lock+0x3c/0x85
Feb 28 09:54:22 debblab kernel: [72801.913707]  [<ffffffff810c1add>] ? find_get_pages_tag+0x66/0x121
Feb 28 09:54:22 debblab kernel: [72801.913709]  [<ffffffff810c15ec>] ? __lock_page+0x61/0x66
Feb 28 09:54:22 debblab kernel: [72801.913713]  [<ffffffff81057ac1>] ? autoremove_wake_function+0x2a/0x2a
Feb 28 09:54:22 debblab kernel: [72801.913741]  [<ffffffffa0238f7c>] ? extent_write_cache_pages.isra.21.constprop.40+0x106/0x283 [btrfs]
Feb 28 09:54:22 debblab kernel: [72801.913754]  [<ffffffffa0239308>] ? extent_writepages+0x4a/0x61 [btrfs]
Feb 28 09:54:22 debblab kernel: [72801.913766]  [<ffffffffa02261bc>] ? btrfs_update_inode_item+0xde/0xde [btrfs]
Feb 28 09:54:22 debblab kernel: [72801.913769]  [<ffffffff811269d9>] ? __writeback_single_inode+0x3e/0x115
Feb 28 09:54:22 debblab kernel: [72801.913771]  [<ffffffff81127730>] ? writeback_sb_inodes+0x1dd/0x30c
Feb 28 09:54:22 debblab kernel: [72801.913774]  [<ffffffff811278c8>] ? __writeback_inodes_wb+0x69/0xab
Feb 28 09:54:22 debblab kernel: [72801.913776]  [<ffffffff81127a41>] ? wb_writeback+0x137/0x28c
Feb 28 09:54:22 debblab kernel: [72801.913779]  [<ffffffff81127e38>] ? wb_do_writeback+0x146/0x1bb
Feb 28 09:54:22 debblab kernel: [72801.913781]  [<ffffffff81049780>] ? del_timer_sync+0x27/0x44
Feb 28 09:54:22 debblab kernel: [72801.913784]  [<ffffffff81127ead>] ? wb_do_writeback+0x1bb/0x1bb
Feb 28 09:54:22 debblab kernel: [72801.913786]  [<ffffffff81127f55>] ? bdi_writeback_thread+0xa8/0x1db
Feb 28 09:54:22 debblab kernel: [72801.913788]  [<ffffffff81127ead>] ? wb_do_writeback+0x1bb/0x1bb
Feb 28 09:54:22 debblab kernel: [72801.913790]  [<ffffffff81127ead>] ? wb_do_writeback+0x1bb/0x1bb
Feb 28 09:54:22 debblab kernel: [72801.913792]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Feb 28 09:54:22 debblab kernel: [72801.913795]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 28 09:54:22 debblab kernel: [72801.913798]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Feb 28 09:54:22 debblab kernel: [72801.913800]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 28 09:54:22 debblab kernel: [72801.913946] amule           D ffff88045fc13b80     0 11755   9345 0x00000000
Feb 28 09:54:22 debblab kernel: [72801.913948]  ffff8800669ff080 0000000000000086 ffff880039599e70 ffff88007639d8c0
Feb 28 09:54:22 debblab kernel: [72801.913950]  0000000000013b80 ffff880039599fd8 ffff880039599fd8 ffff8800669ff080
Feb 28 09:54:22 debblab kernel: [72801.913953]  ffffffff81013789 ffff88045fc13b80 ffff8800669ff080 ffff880039599ce0
Feb 28 09:54:22 debblab kernel: [72801.913955] Call Trace:
Feb 28 09:54:22 debblab kernel: [72801.913957]  [<ffffffff81013789>] ? read_tsc+0x5/0x14
Feb 28 09:54:22 debblab kernel: [72801.913960]  [<ffffffff810c15f1>] ? __lock_page+0x66/0x66
Feb 28 09:54:22 debblab kernel: [72801.913962]  [<ffffffff81378020>] ? io_schedule+0x56/0x6d
Feb 28 09:54:22 debblab kernel: [72801.913964]  [<ffffffff810c15f8>] ? sleep_on_page+0x7/0xc
Feb 28 09:54:22 debblab kernel: [72801.913967]  [<ffffffff81377082>] ? __wait_on_bit_lock+0x3c/0x85
Feb 28 09:54:22 debblab kernel: [72801.913969]  [<ffffffff810c1b5e>] ? find_get_pages_tag+0xe7/0x121
Feb 28 09:54:22 debblab kernel: [72801.913971]  [<ffffffff810c15ec>] ? __lock_page+0x61/0x66
Feb 28 09:54:22 debblab kernel: [72801.913973]  [<ffffffff81057ac1>] ? autoremove_wake_function+0x2a/0x2a
Feb 28 09:54:22 debblab kernel: [72801.913986]  [<ffffffffa0238f7c>] ? extent_write_cache_pages.isra.21.constprop.40+0x106/0x283 [btrfs]
Feb 28 09:54:22 debblab kernel: [72801.913990]  [<ffffffff811182df>] ? dput+0x27/0x102
Feb 28 09:54:22 debblab kernel: [72801.913993]  [<ffffffff8111e27e>] ? mntput_no_expire+0x2d/0x137
Feb 28 09:54:22 debblab kernel: [72801.914005]  [<ffffffffa0239308>] ? extent_writepages+0x4a/0x61 [btrfs]
Feb 28 09:54:22 debblab kernel: [72801.914017]  [<ffffffffa02261bc>] ? btrfs_update_inode_item+0xde/0xde [btrfs]
Feb 28 09:54:22 debblab kernel: [72801.914019]  [<ffffffff81377db2>] ? _cond_resched+0x6/0x1b
Feb 28 09:54:22 debblab kernel: [72801.914021]  [<ffffffff810c296a>] ? __filemap_fdatawrite_range+0x4d/0x52
Feb 28 09:54:22 debblab kernel: [72801.914024]  [<ffffffff810c2993>] ? filemap_write_and_wait_range+0x24/0x49
Feb 28 09:54:22 debblab kernel: [72801.914035]  [<ffffffffa022f17a>] ? btrfs_sync_file+0x47/0x1e6 [btrfs]
Feb 28 09:54:22 debblab kernel: [72801.914038]  [<ffffffff8112aa03>] ? do_fsync+0x2b/0x50
Feb 28 09:54:22 debblab kernel: [72801.914040]  [<ffffffff8112abed>] ? sys_fsync+0x9/0xe
Feb 28 09:54:22 debblab kernel: [72801.914043]  [<ffffffff8137dba9>] ? system_call_fastpath+0x16/0x1b

Yet another warning:

Feb 28 12:31:36 debblab kernel: [82231.224628] ------------[ cut here ]------------
Feb 28 12:31:36 debblab kernel: [82231.224661] WARNING: at /build/buildd-linux_3.7.8-1~experimental.1-amd64-3TxQRS/linux-3.7.8/fs/btrfs/tree-log.c:3716 btrfs_log_inode_parent+0x291/0x2fd [btrfs]()
Feb 28 12:31:36 debblab kernel: [82231.224662] Hardware name: S3420GP
Feb 28 12:31:36 debblab kernel: [82231.224663] Modules linked in: cpuid ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs reiserfs ext3 jbd ext2 sha256_generic cbc dm_crypt ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables parport_pc ppdev lp parport cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_stats fuse nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc bonding loop joydev snd_hda_codec_hdmi coretemp fglrx(PO) iTCO_wdt kvm_intel iTCO_vendor_support evdev kvm snd_hda_intel snd_hda_codec crc32c_intel snd_hwdep snd_pcm snd_page_alloc snd_seq i7core_edac snd_seq_device pcspkr snd_timer edac_core i2c_i801 i2c_core snd lpc_ich mfd_core soundcore acpi_cpufreq mperf processor button thermal_sys ext4 crc16 jbd2 mbcache btrfs crc32c libcrc32c zlib_deflate dm_mod raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq linear md_mod ses hid_generic usbhid hid sg enclosure sd_mod crc_t10dif microcode megaraid_sas ahci libahci ehci_h
Feb 28 12:31:36 debblab kernel: cd e1000e libata scsi_mod usbcore usb_common
Feb 28 12:31:36 debblab kernel: [82231.224716] Pid: 2487, comm: nfsd Tainted: P           O 3.7-trunk-amd64 #1 Debian 3.7.8-1~experimental.1
Feb 28 12:31:36 debblab kernel: [82231.224717] Call Trace:
Feb 28 12:31:36 debblab kernel: [82231.224723]  [<ffffffff8103ced4>] ? warn_slowpath_common+0x76/0x8a
Feb 28 12:31:36 debblab kernel: [82231.224736]  [<ffffffffa024e080>] ? btrfs_log_inode_parent+0x291/0x2fd [btrfs]
Feb 28 12:31:36 debblab kernel: [82231.224749]  [<ffffffffa024e121>] ? btrfs_log_dentry_safe+0x35/0x4e [btrfs]
Feb 28 12:31:36 debblab kernel: [82231.224761]  [<ffffffffa022f284>] ? btrfs_sync_file+0x151/0x1e6 [btrfs]
Feb 28 12:31:36 debblab kernel: [82231.224774]  [<ffffffffa023058a>] ? btrfs_file_aio_write+0x373/0x3c4 [btrfs]
Feb 28 12:31:36 debblab kernel: [82231.224777]  [<ffffffff812cdeb8>] ? sch_direct_xmit+0x91/0x165
Feb 28 12:31:36 debblab kernel: [82231.224781]  [<ffffffff810436d3>] ? _local_bh_enable_ip.isra.11+0x1b/0x88
Feb 28 12:31:36 debblab kernel: [82231.224794]  [<ffffffffa0230217>] ? __btrfs_buffered_write+0x2e8/0x2e8 [btrfs]
Feb 28 12:31:36 debblab kernel: [82231.224797]  [<ffffffff81108952>] ? do_sync_readv_writev+0x57/0x94
Feb 28 12:31:36 debblab kernel: [82231.224800]  [<ffffffff81108b9b>] ? do_readv_writev+0x94/0x108
Feb 28 12:31:36 debblab kernel: [82231.224807]  [<ffffffffa099d252>] ? nfsd_vfs_write.isra.8+0xc3/0x20e [nfsd]
Feb 28 12:31:36 debblab kernel: [82231.224810]  [<ffffffff8105d08d>] ? groups_alloc+0x32/0xb1
Feb 28 12:31:36 debblab kernel: [82231.224817]  [<ffffffffa09ad2e5>] ? renew_client_locked+0x76/0x7f [nfsd]
Feb 28 12:31:36 debblab kernel: [82231.224824]  [<ffffffffa09ad306>] ? renew_client+0x18/0x25 [nfsd]
Feb 28 12:31:36 debblab kernel: [82231.224831]  [<ffffffffa09ad35a>] ? find_confirmed_client+0x47/0x5c [nfsd]
Feb 28 12:31:36 debblab kernel: [82231.224837]  [<ffffffffa099e9f9>] ? nfsd_write+0x7f/0xf0 [nfsd]
Feb 28 12:31:36 debblab kernel: [82231.224840]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Feb 28 12:31:36 debblab kernel: [82231.224846]  [<ffffffffa09a695b>] ? nfsd4_write+0xcb/0xf3 [nfsd]
Feb 28 12:31:36 debblab kernel: [82231.224853]  [<ffffffffa09a6518>] ? nfsd4_proc_compound+0x224/0x3b2 [nfsd]
Feb 28 12:31:36 debblab kernel: [82231.224858]  [<ffffffffa099a7b2>] ? nfsd_dispatch+0x93/0x148 [nfsd]
Feb 28 12:31:36 debblab kernel: [82231.224867]  [<ffffffffa044a3c7>] ? svc_process_common+0x289/0x439 [sunrpc]
Feb 28 12:31:36 debblab kernel: [82231.224872]  [<ffffffffa099a076>] ? nfsd_destroy.constprop.2+0x3c/0x3c [nfsd]
Feb 28 12:31:36 debblab kernel: [82231.224879]  [<ffffffffa044af4e>] ? svc_process+0x111/0x12d [sunrpc]
Feb 28 12:31:36 debblab kernel: [82231.224883]  [<ffffffffa099a120>] ? nfsd+0xaa/0xfe [nfsd]
Feb 28 12:31:36 debblab kernel: [82231.224887]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Feb 28 12:31:36 debblab kernel: [82231.224889]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 28 12:31:36 debblab kernel: [82231.224892]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Feb 28 12:31:36 debblab kernel: [82231.224894]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 28 12:31:36 debblab kernel: [82231.224896] ---[ end trace 6780edec6268a510 ]---
Feb 28 12:33:05 debblab kernel: [82320.245759] ------------[ cut here ]------------

More warnings:

Feb 28 12:33:05 debblab kernel: [82320.245791] WARNING: at /build/buildd-linux_3.7.8-1~experimental.1-amd64-3TxQRS/linux-3.7.8/fs/btrfs/tree-log.c:3716 btrfs_log_inode_parent+0x291/0x2fd [btrfs]()
Feb 28 12:33:05 debblab kernel: [82320.245793] Hardware name: S3420GP
Feb 28 12:33:05 debblab kernel: [82320.245794] Modules linked in: cpuid ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs reiserfs ext3 jbd ext2 sha256_generic cbc dm_crypt ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables parport_pc ppdev lp parport cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_stats fuse nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc bonding loop joydev snd_hda_codec_hdmi coretemp fglrx(PO) iTCO_wdt kvm_intel iTCO_vendor_support evdev kvm snd_hda_intel snd_hda_codec crc32c_intel snd_hwdep snd_pcm snd_page_alloc snd_seq i7core_edac snd_seq_device pcspkr snd_timer edac_core i2c_i801 i2c_core snd lpc_ich mfd_core soundcore acpi_cpufreq mperf processor button thermal_sys ext4 crc16 jbd2 mbcache btrfs crc32c libcrc32c zlib_deflate dm_mod raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq linear md_mod ses hid_generic usbhid hid sg enclosure sd_mod crc_t10dif microcode megaraid_sas ahci libahci ehci_h
Feb 28 12:33:05 debblab kernel: cd e1000e libata scsi_mod usbcore usb_common
Feb 28 12:33:05 debblab kernel: [82320.245847] Pid: 2436, comm: nfsd Tainted: P        W  O 3.7-trunk-amd64 #1 Debian 3.7.8-1~experimental.1
Feb 28 12:33:05 debblab kernel: [82320.245849] Call Trace:
Feb 28 12:33:05 debblab kernel: [82320.245854]  [<ffffffff8103ced4>] ? warn_slowpath_common+0x76/0x8a
Feb 28 12:33:05 debblab kernel: [82320.245867]  [<ffffffffa024e080>] ? btrfs_log_inode_parent+0x291/0x2fd [btrfs]
Feb 28 12:33:05 debblab kernel: [82320.245880]  [<ffffffffa024e121>] ? btrfs_log_dentry_safe+0x35/0x4e [btrfs]
Feb 28 12:33:05 debblab kernel: [82320.245893]  [<ffffffffa022f284>] ? btrfs_sync_file+0x151/0x1e6 [btrfs]
Feb 28 12:33:05 debblab kernel: [82320.245905]  [<ffffffffa023058a>] ? btrfs_file_aio_write+0x373/0x3c4 [btrfs]
Feb 28 12:33:05 debblab kernel: [82320.245910]  [<ffffffff812cdeb8>] ? sch_direct_xmit+0x91/0x165
Feb 28 12:33:05 debblab kernel: [82320.245914]  [<ffffffff810436d3>] ? _local_bh_enable_ip.isra.11+0x1b/0x88
Feb 28 12:33:05 debblab kernel: [82320.245927]  [<ffffffffa0230217>] ? __btrfs_buffered_write+0x2e8/0x2e8 [btrfs]
Feb 28 12:33:05 debblab kernel: [82320.245930]  [<ffffffff81108952>] ? do_sync_readv_writev+0x57/0x94
Feb 28 12:33:05 debblab kernel: [82320.245934]  [<ffffffff81108b9b>] ? do_readv_writev+0x94/0x108
Feb 28 12:33:05 debblab kernel: [82320.245942]  [<ffffffffa0450a42>] ? seconds_since_boot+0x11/0x1a [sunrpc]
Feb 28 12:33:05 debblab kernel: [82320.245949]  [<ffffffffa099d252>] ? nfsd_vfs_write.isra.8+0xc3/0x20e [nfsd]
Feb 28 12:33:05 debblab kernel: [82320.245953]  [<ffffffff8105d08d>] ? groups_alloc+0x32/0xb1
Feb 28 12:33:05 debblab kernel: [82320.245960]  [<ffffffffa09ad2e5>] ? renew_client_locked+0x76/0x7f [nfsd]
Feb 28 12:33:05 debblab kernel: [82320.245967]  [<ffffffffa09ad306>] ? renew_client+0x18/0x25 [nfsd]
Feb 28 12:33:05 debblab kernel: [82320.245974]  [<ffffffffa09ad35a>] ? find_confirmed_client+0x47/0x5c [nfsd]
Feb 28 12:33:05 debblab kernel: [82320.245980]  [<ffffffffa099e9f9>] ? nfsd_write+0x7f/0xf0 [nfsd]
Feb 28 12:33:05 debblab kernel: [82320.245983]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Feb 28 12:33:05 debblab kernel: [82320.245989]  [<ffffffffa09a695b>] ? nfsd4_write+0xcb/0xf3 [nfsd]
Feb 28 12:33:05 debblab kernel: [82320.245996]  [<ffffffffa09a6518>] ? nfsd4_proc_compound+0x224/0x3b2 [nfsd]
Feb 28 12:33:05 debblab kernel: [82320.246001]  [<ffffffffa099a7b2>] ? nfsd_dispatch+0x93/0x148 [nfsd]
Feb 28 12:33:05 debblab kernel: [82320.246008]  [<ffffffffa044a3c7>] ? svc_process_common+0x289/0x439 [sunrpc]
Feb 28 12:33:05 debblab kernel: [82320.246013]  [<ffffffffa099a076>] ? nfsd_destroy.constprop.2+0x3c/0x3c [nfsd]
Feb 28 12:33:05 debblab kernel: [82320.246020]  [<ffffffffa044af4e>] ? svc_process+0x111/0x12d [sunrpc]
Feb 28 12:33:05 debblab kernel: [82320.246024]  [<ffffffffa099a120>] ? nfsd+0xaa/0xfe [nfsd]
Feb 28 12:33:05 debblab kernel: [82320.246027]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Feb 28 12:33:05 debblab kernel: [82320.246030]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 28 12:33:05 debblab kernel: [82320.246033]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Feb 28 12:33:05 debblab kernel: [82320.246035]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Feb 28 12:33:05 debblab kernel: [82320.246037] ---[ end trace 6780edec6268a511 ]---


Mar  4 05:02:13 debblab kernel: [400706.851020] btrfs-transacti D ffff88045fcd3b80     0  6332      2 0x00000000
Mar  4 05:02:13 debblab kernel: [400706.851027]  ffff88044b988800 0000000000000046 ffff88007522fba0 ffff88044e121880
Mar  4 05:02:13 debblab kernel: [400706.851033]  0000000000013b80 ffff880391c27fd8 ffff880391c27fd8 ffff88044b988800
Mar  4 05:02:13 debblab kernel: [400706.851038]  ffffffff81013789 ffff88045fcd3b80 ffff88044b988800 ffff880391c27d20
Mar  4 05:02:13 debblab kernel: [400706.851044] Call Trace:
Mar  4 05:02:13 debblab kernel: [400706.851056]  [<ffffffff81013789>] ? read_tsc+0x5/0x14
Mar  4 05:02:13 debblab kernel: [400706.851062]  [<ffffffff8112bdfd>] ? do_thaw_one+0x6f/0x6f
Mar  4 05:02:13 debblab kernel: [400706.851071]  [<ffffffff81378020>] ? io_schedule+0x56/0x6d
Mar  4 05:02:13 debblab kernel: [400706.851075]  [<ffffffff8112be03>] ? sleep_on_buffer+0x6/0xa
Mar  4 05:02:13 debblab kernel: [400706.851080]  [<ffffffff81376f97>] ? __wait_on_bit+0x3e/0x75
Mar  4 05:02:13 debblab kernel: [400706.851086]  [<ffffffff8137703d>] ? out_of_line_wait_on_bit+0x6f/0x78
Mar  4 05:02:13 debblab kernel: [400706.851090]  [<ffffffff8112bdfd>] ? do_thaw_one+0x6f/0x6f
Mar  4 05:02:13 debblab kernel: [400706.851098]  [<ffffffff81057ac1>] ? autoremove_wake_function+0x2a/0x2a
Mar  4 05:02:13 debblab kernel: [400706.851137]  [<ffffffffa021ed3c>] ? write_all_supers+0x730/0x80f [btrfs]
Mar  4 05:02:13 debblab kernel: [400706.851150]  [<ffffffffa02234e0>] ? btrfs_commit_transaction+0x6a5/0x93a [btrfs]
Mar  4 05:02:13 debblab kernel: [400706.851153]  [<ffffffff81057a97>] ? abort_exclusive_wait+0x79/0x79
Mar  4 05:02:13 debblab kernel: [400706.851165]  [<ffffffffa0223db4>] ? start_transaction+0x32e/0x3cb [btrfs]
Mar  4 05:02:13 debblab kernel: [400706.851171]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Mar  4 05:02:13 debblab kernel: [400706.851181]  [<ffffffffa021ceff>] ? transaction_kthread+0xe0/0x183 [btrfs]
Mar  4 05:02:13 debblab kernel: [400706.851192]  [<ffffffffa021ce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Mar  4 05:02:13 debblab kernel: [400706.851202]  [<ffffffffa021ce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Mar  4 05:02:13 debblab kernel: [400706.851204]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Mar  4 05:02:13 debblab kernel: [400706.851207]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Mar  4 05:02:13 debblab kernel: [400706.851209]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Mar  4 05:02:13 debblab kernel: [400706.851212]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c


Mar  5 05:30:10 debblab kernel: [488739.849592] btrfs-transacti D ffff88045fc13b80     0  6332      2 0x00000000
Mar  5 05:30:10 debblab kernel: [488739.849595]  ffff88044b988800 0000000000000046 ffff8804115c4858 ffffffff816133f0
Mar  5 05:30:10 debblab kernel: [488739.849598]  0000000000013b80 ffff880391c27fd8 ffff880391c27fd8 ffff88044b988800
Mar  5 05:30:10 debblab kernel: [488739.849601]  ffffffff81013789 ffff88045fc13b80 ffff88044b988800 ffff880391c27d20
Mar  5 05:30:10 debblab kernel: [488739.849603] Call Trace:
Mar  5 05:30:10 debblab kernel: [488739.849610]  [<ffffffff81013789>] ? read_tsc+0x5/0x14
Mar  5 05:30:10 debblab kernel: [488739.849617]  [<ffffffff8112bdfd>] ? do_thaw_one+0x6f/0x6f
Mar  5 05:30:10 debblab kernel: [488739.849621]  [<ffffffff81378020>] ? io_schedule+0x56/0x6d
Mar  5 05:30:10 debblab kernel: [488739.849623]  [<ffffffff8112be03>] ? sleep_on_buffer+0x6/0xa
Mar  5 05:30:10 debblab kernel: [488739.849625]  [<ffffffff81376f97>] ? __wait_on_bit+0x3e/0x75
Mar  5 05:30:10 debblab kernel: [488739.849628]  [<ffffffff8137703d>] ? out_of_line_wait_on_bit+0x6f/0x78
Mar  5 05:30:10 debblab kernel: [488739.849630]  [<ffffffff8112bdfd>] ? do_thaw_one+0x6f/0x6f
Mar  5 05:30:10 debblab kernel: [488739.849634]  [<ffffffff81057ac1>] ? autoremove_wake_function+0x2a/0x2a
Mar  5 05:30:10 debblab kernel: [488739.849660]  [<ffffffffa021ed3c>] ? write_all_supers+0x730/0x80f [btrfs]
Mar  5 05:30:10 debblab kernel: [488739.849672]  [<ffffffffa02234e0>] ? btrfs_commit_transaction+0x6a5/0x93a [btrfs]
Mar  5 05:30:10 debblab kernel: [488739.849674]  [<ffffffff81057a97>] ? abort_exclusive_wait+0x79/0x79
Mar  5 05:30:10 debblab kernel: [488739.849686]  [<ffffffffa0223db4>] ? start_transaction+0x32e/0x3cb [btrfs]
Mar  5 05:30:10 debblab kernel: [488739.849689]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Mar  5 05:30:10 debblab kernel: [488739.849700]  [<ffffffffa021ceff>] ? transaction_kthread+0xe0/0x183 [btrfs]
Mar  5 05:30:10 debblab kernel: [488739.849710]  [<ffffffffa021ce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Mar  5 05:30:10 debblab kernel: [488739.849721]  [<ffffffffa021ce1f>] ? try_to_freeze+0x2e/0x2e [btrfs]
Mar  5 05:30:10 debblab kernel: [488739.849724]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Mar  5 05:30:10 debblab kernel: [488739.849726]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Mar  5 05:30:10 debblab kernel: [488739.849729]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Mar  5 05:30:10 debblab kernel: [488739.849731]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c


Mar  8 12:01:32 debblab kernel: [771281.100361] ------------[ cut here ]------------
Mar  8 12:01:32 debblab kernel: [771281.100392] WARNING: at /build/buildd-linux_3.7.8-1~experimental.1-amd64-3TxQRS/linux-3.7.8/fs/btrfs/tree-log.c:3716 btrfs_log_inode_parent+0x291/0x2fd [btrfs]()
Mar  8 12:01:32 debblab kernel: [771281.100403] Hardware name: S3420GP
Mar  8 12:01:32 debblab kernel: [771281.100404] Modules linked in: cpuid ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs reiserfs ext3 jbd ext2 sha256_generic cbc dm_crypt ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables parport_pc ppdev lp parport cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_stats fuse nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc bonding loop joydev snd_hda_codec_hdmi coretemp fglrx(PO) iTCO_wdt kvm_intel iTCO_vendor_support evdev kvm snd_hda_intel snd_hda_codec crc32c_intel snd_hwdep snd_pcm snd_page_alloc snd_seq i7core_edac snd_seq_device pcspkr snd_timer edac_core i2c_i801 i2c_core snd lpc_ich mfd_core soundcore acpi_cpufreq mperf processor button thermal_sys ext4 crc16 jbd2 mbcache btrfs crc32c libcrc32c zlib_deflate dm_mod raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq linear md_mod ses hid_generic usbhid hid sg enclosure sd_mod crc_t10dif microcode megaraid_sas ahci libahci ehci_
Mar  8 12:01:32 debblab kernel: hcd e1000e libata scsi_mod usbcore usb_common
Mar  8 12:01:32 debblab kernel: [771281.100458] Pid: 2470, comm: nfsd Tainted: P        W  O 3.7-trunk-amd64 #1 Debian 3.7.8-1~experimental.1
Mar  8 12:01:32 debblab kernel: [771281.100459] Call Trace:
Mar  8 12:01:32 debblab kernel: [771281.100464]  [<ffffffff8103ced4>] ? warn_slowpath_common+0x76/0x8a
Mar  8 12:01:32 debblab kernel: [771281.100478]  [<ffffffffa024e080>] ? btrfs_log_inode_parent+0x291/0x2fd [btrfs]
Mar  8 12:01:32 debblab kernel: [771281.100491]  [<ffffffffa024e121>] ? btrfs_log_dentry_safe+0x35/0x4e [btrfs]
Mar  8 12:01:32 debblab kernel: [771281.100503]  [<ffffffffa022f284>] ? btrfs_sync_file+0x151/0x1e6 [btrfs]
Mar  8 12:01:32 debblab kernel: [771281.100516]  [<ffffffffa023058a>] ? btrfs_file_aio_write+0x373/0x3c4 [btrfs]
Mar  8 12:01:32 debblab kernel: [771281.100519]  [<ffffffff812cdeb8>] ? sch_direct_xmit+0x91/0x165
Mar  8 12:01:32 debblab kernel: [771281.100523]  [<ffffffff810436d3>] ? _local_bh_enable_ip.isra.11+0x1b/0x88
Mar  8 12:01:32 debblab kernel: [771281.100536]  [<ffffffffa0230217>] ? __btrfs_buffered_write+0x2e8/0x2e8 [btrfs]
Mar  8 12:01:32 debblab kernel: [771281.100539]  [<ffffffff81108952>] ? do_sync_readv_writev+0x57/0x94
Mar  8 12:01:32 debblab kernel: [771281.100542]  [<ffffffff81108b9b>] ? do_readv_writev+0x94/0x108
Mar  8 12:01:32 debblab kernel: [771281.100550]  [<ffffffffa0450a42>] ? seconds_since_boot+0x11/0x1a [sunrpc]
Mar  8 12:01:32 debblab kernel: [771281.100557]  [<ffffffffa099d252>] ? nfsd_vfs_write.isra.8+0xc3/0x20e [nfsd]
Mar  8 12:01:32 debblab kernel: [771281.100568]  [<ffffffff8105d08d>] ? groups_alloc+0x32/0xb1
Mar  8 12:01:32 debblab kernel: [771281.100576]  [<ffffffffa09ad2e5>] ? renew_client_locked+0x76/0x7f [nfsd]
Mar  8 12:01:32 debblab kernel: [771281.100583]  [<ffffffffa09ad306>] ? renew_client+0x18/0x25 [nfsd]
Mar  8 12:01:32 debblab kernel: [771281.100590]  [<ffffffffa09ad35a>] ? find_confirmed_client+0x47/0x5c [nfsd]
Mar  8 12:01:32 debblab kernel: [771281.100596]  [<ffffffffa099e9f9>] ? nfsd_write+0x7f/0xf0 [nfsd]
Mar  8 12:01:32 debblab kernel: [771281.100599]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Mar  8 12:01:32 debblab kernel: [771281.100606]  [<ffffffffa09a695b>] ? nfsd4_write+0xcb/0xf3 [nfsd]
Mar  8 12:01:32 debblab kernel: [771281.100612]  [<ffffffffa09a6518>] ? nfsd4_proc_compound+0x224/0x3b2 [nfsd]
Mar  8 12:01:32 debblab kernel: [771281.100618]  [<ffffffffa099a7b2>] ? nfsd_dispatch+0x93/0x148 [nfsd]
Mar  8 12:01:32 debblab kernel: [771281.100625]  [<ffffffffa044a3c7>] ? svc_process_common+0x289/0x439 [sunrpc]
Mar  8 12:01:32 debblab kernel: [771281.100630]  [<ffffffffa099a076>] ? nfsd_destroy.constprop.2+0x3c/0x3c [nfsd]
Mar  8 12:01:32 debblab kernel: [771281.100636]  [<ffffffffa044af4e>] ? svc_process+0x111/0x12d [sunrpc]
Mar  8 12:01:32 debblab kernel: [771281.100641]  [<ffffffffa099a120>] ? nfsd+0xaa/0xfe [nfsd]
Mar  8 12:01:32 debblab kernel: [771281.100649]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Mar  8 12:01:32 debblab kernel: [771281.100652]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Mar  8 12:01:32 debblab kernel: [771281.100655]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Mar  8 12:01:32 debblab kernel: [771281.100658]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Mar  8 12:01:32 debblab kernel: [771281.100659] ---[ end trace 6780edec6268a512 ]---
Mar  8 12:02:11 debblab kernel: [771320.315734] ------------[ cut here ]------------

Crash:

Mar  8 12:02:11 debblab kernel: [771320.315741] invalid opcode: 0000 [#1] SMP 
Mar  8 12:02:11 debblab kernel: [771320.315743] Modules linked in: cpuid ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs reiserfs ext3 jbd ext2 sha256_generic cbc dm_crypt ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables parport_pc ppdev lp parport cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_stats fuse nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc bonding loop joydev snd_hda_codec_hdmi coretemp fglrx(PO) iTCO_wdt kvm_intel iTCO_vendor_support evdev kvm snd_hda_intel snd_hda_codec crc32c_intel snd_hwdep snd_pcm snd_page_alloc snd_seq i7core_edac snd_seq_device pcspkr snd_timer edac_core i2c_i801 i2c_core snd lpc_ich mfd_core soundcore acpi_cpufreq mperf processor button thermal_sys ext4 crc16 jbd2 mbcache btrfs crc32c libcrc32c zlib_deflate dm_mod raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq linear md_mod ses hid_generic usbhid hid sg enclosure sd_mod crc_t10dif microcode megaraid_sas ahci libahci ehci_
Mar  8 12:02:11 debblab kernel: hcd e1000e libata scsi_mod usbcore usb_common
Mar  8 12:02:11 debblab kernel: [771320.315851] CPU 0 
Mar  8 12:02:11 debblab kernel: [771320.315857] Pid: 2456, comm: nfsd Tainted: P        W  O 3.7-trunk-amd64 #1 Debian 3.7.8-1~experimental.1 Intel Corporation S3420GP/S3420GP
Mar  8 12:02:11 debblab kernel: [771320.315860] RIP: 0010:[<ffffffffa0208e20>]  [<ffffffffa0208e20>] btrfs_set_item_key_safe+0x75/0xd4 [btrfs]
Mar  8 12:02:11 debblab kernel: [771320.315885] RSP: 0018:ffff88044344b5f8  EFLAGS: 00010246
Mar  8 12:02:11 debblab kernel: [771320.315889] RAX: 0000000000000000 RBX: 000000000000000e RCX: 0000000000000000
Mar  8 12:02:11 debblab kernel: [771320.315892] RDX: 0000000000219000 RSI: ffff88044344b717 RDI: ffff88044344b5df
Mar  8 12:02:11 debblab kernel: [771320.315896] RBP: ffff8801f5b341f8 R08: ffff88044344b618 R09: 0000000000000008
Mar  8 12:02:11 debblab kernel: [771320.315899] R10: 0000000000001000 R11: 0000160000000000 R12: ffff88044344b717
Mar  8 12:02:11 debblab kernel: [771320.315902] R13: ffff8801ba743130 R14: ffff88044b721800 R15: ffff88044b721800
Mar  8 12:02:11 debblab kernel: [771320.315906] FS:  0000000000000000(0000) GS:ffff88045fc00000(0000) knlGS:0000000000000000
Mar  8 12:02:11 debblab kernel: [771320.315910] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Mar  8 12:02:11 debblab kernel: [771320.315913] CR2: 00007f02b0568000 CR3: 000000000160b000 CR4: 00000000000007f0
Mar  8 12:02:11 debblab kernel: [771320.315917] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Mar  8 12:02:11 debblab kernel: [771320.315920] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Mar  8 12:02:11 debblab kernel: [771320.315924] Process nfsd (pid: 2456, threadinfo ffff88044344a000, task ffff88034aa08880)
Mar  8 12:02:11 debblab kernel: [771320.315926] Stack:
Mar  8 12:02:11 debblab kernel: [771320.315928]  ffff8802f54af000 2900000000000000 6c00000000006668 0000000000219000
Mar  8 12:02:11 debblab kernel: [771320.315934]  ffff8801ba743130 000000000021b000 ffff8801f5b341f8 0000000000000000
Mar  8 12:02:11 debblab kernel: [771320.315940]  0000000000000000 ffffffffa0231196 0000000000216000 ffffffffa02085f3
Mar  8 12:02:11 debblab kernel: [771320.315945] Call Trace:
Mar  8 12:02:11 debblab kernel: [771320.315975]  [<ffffffffa0231196>] ? __btrfs_drop_extents+0x533/0x858 [btrfs]
Mar  8 12:02:11 debblab kernel: [771320.315995]  [<ffffffffa02085f3>] ? generic_bin_search.constprop.50+0xee/0x12a [btrfs]
Mar  8 12:02:11 debblab kernel: [771320.316023]  [<ffffffffa0249216>] ? btrfs_ino+0x1a/0x1a [btrfs]
Mar  8 12:02:11 debblab kernel: [771320.316051]  [<ffffffffa02489ee>] ? btrfs_tree_read_unlock+0x7b/0x8a [btrfs]
Mar  8 12:02:11 debblab kernel: [771320.316080]  [<ffffffffa024cae4>] ? btrfs_log_inode+0x57c/0x94d [btrfs]
Mar  8 12:02:11 debblab kernel: [771320.316088]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Mar  8 12:02:11 debblab kernel: [771320.316117]  [<ffffffffa024dfbb>] ? btrfs_log_inode_parent+0x1cc/0x2fd [btrfs]
Mar  8 12:02:11 debblab kernel: [771320.316145]  [<ffffffffa024e121>] ? btrfs_log_dentry_safe+0x35/0x4e [btrfs]
Mar  8 12:02:11 debblab kernel: [771320.316173]  [<ffffffffa022f284>] ? btrfs_sync_file+0x151/0x1e6 [btrfs]
Mar  8 12:02:11 debblab kernel: [771320.316201]  [<ffffffffa023058a>] ? btrfs_file_aio_write+0x373/0x3c4 [btrfs]
Mar  8 12:02:11 debblab kernel: [771320.316208]  [<ffffffff812cdeb8>] ? sch_direct_xmit+0x91/0x165
Mar  8 12:02:11 debblab kernel: [771320.316217]  [<ffffffff810436d3>] ? _local_bh_enable_ip.isra.11+0x1b/0x88
Mar  8 12:02:11 debblab kernel: [771320.316245]  [<ffffffffa0230217>] ? __btrfs_buffered_write+0x2e8/0x2e8 [btrfs]
Mar  8 12:02:11 debblab kernel: [771320.316252]  [<ffffffff81108952>] ? do_sync_readv_writev+0x57/0x94
Mar  8 12:02:11 debblab kernel: [771320.316258]  [<ffffffff81108b9b>] ? do_readv_writev+0x94/0x108
Mar  8 12:02:11 debblab kernel: [771320.316271]  [<ffffffffa099c1ff>] ? mk_fsid.part.6+0x18/0x18 [nfsd]
Mar  8 12:02:11 debblab kernel: [771320.316278]  [<ffffffff81161745>] ? exportfs_decode_fh+0xcc/0x257
Mar  8 12:02:11 debblab kernel: [771320.316294]  [<ffffffffa0450a42>] ? seconds_since_boot+0x11/0x1a [sunrpc]
Mar  8 12:02:11 debblab kernel: [771320.316306]  [<ffffffffa099d252>] ? nfsd_vfs_write.isra.8+0xc3/0x20e [nfsd]
Mar  8 12:02:11 debblab kernel: [771320.316312]  [<ffffffff8105d08d>] ? groups_alloc+0x32/0xb1
Mar  8 12:02:11 debblab kernel: [771320.316328]  [<ffffffffa09ad2e5>] ? renew_client_locked+0x76/0x7f [nfsd]
Mar  8 12:02:11 debblab kernel: [771320.316344]  [<ffffffffa09ad306>] ? renew_client+0x18/0x25 [nfsd]
Mar  8 12:02:11 debblab kernel: [771320.316359]  [<ffffffffa09ad35a>] ? find_confirmed_client+0x47/0x5c [nfsd]
Mar  8 12:02:11 debblab kernel: [771320.316372]  [<ffffffffa099e9f9>] ? nfsd_write+0x7f/0xf0 [nfsd]
Mar  8 12:02:11 debblab kernel: [771320.316377]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Mar  8 12:02:11 debblab kernel: [771320.316392]  [<ffffffffa09a695b>] ? nfsd4_write+0xcb/0xf3 [nfsd]
Mar  8 12:02:11 debblab kernel: [771320.316407]  [<ffffffffa09a6518>] ? nfsd4_proc_compound+0x224/0x3b2 [nfsd]
Mar  8 12:02:11 debblab kernel: [771320.316419]  [<ffffffffa099a7b2>] ? nfsd_dispatch+0x93/0x148 [nfsd]
Mar  8 12:02:11 debblab kernel: [771320.316435]  [<ffffffffa044a3c7>] ? svc_process_common+0x289/0x439 [sunrpc]
Mar  8 12:02:11 debblab kernel: [771320.316446]  [<ffffffffa099a076>] ? nfsd_destroy.constprop.2+0x3c/0x3c [nfsd]
Mar  8 12:02:11 debblab kernel: [771320.316461]  [<ffffffffa044af4e>] ? svc_process+0x111/0x12d [sunrpc]
Mar  8 12:02:11 debblab kernel: [771320.316471]  [<ffffffffa099a120>] ? nfsd+0xaa/0xfe [nfsd]
Mar  8 12:02:11 debblab kernel: [771320.316477]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Mar  8 12:02:11 debblab kernel: [771320.316482]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Mar  8 12:02:11 debblab kernel: [771320.316489]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Mar  8 12:02:11 debblab kernel: [771320.316494]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Mar  8 12:02:11 debblab kernel: [771320.316496] Code: 10 c5 ff ff ff c8 39 c3 73 23 8d 53 01 48 8d 74 24 0f 48 89 ef e8 97 c1 ff ff 48 8d 7c 24 0f 4c 89 e6 e8 be f6 ff ff 85 c0 7f 02 <0f> 0b 49 8b 44 24 09 48 8d 74 24 0f 89 da 48 89 ef 48 89 44 24 
Mar  8 12:02:11 debblab kernel: [771320.316559]  RSP <ffff88044344b5f8>
Mar  8 12:02:11 debblab kernel: [771320.316564] ---[ end trace 6780edec6268a513 ]---


Mar  8 12:36:43 debblab kernel: [ 1201.049002] ------------[ cut here ]------------
Mar  8 12:36:43 debblab kernel: [ 1201.049043] WARNING: at /build/buildd-linux_3.7.8-1~experimental.1-amd64-3TxQRS/linux-3.7.8/fs/btrfs/tree-log.c:3716 btrfs_log_inode_parent+0x291/0x2fd [btrfs]()
Mar  8 12:36:43 debblab kernel: [ 1201.049046] Hardware name: S3420GP
Mar  8 12:36:43 debblab kernel: [ 1201.049048] Modules linked in: sha256_generic cbc dm_crypt ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables parport_pc ppdev lp parport cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_stats fuse nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc bonding loop joydev snd_hda_codec_hdmi snd_hda_intel snd_hda_codec coretemp snd_hwdep iTCO_wdt snd_pcm iTCO_vendor_support snd_page_alloc kvm_intel snd_seq snd_seq_device fglrx(PO) snd_timer kvm evdev lpc_ich mfd_core snd soundcore i2c_i801 crc32c_intel pcspkr i2c_core i7core_edac edac_core acpi_cpufreq mperf processor button thermal_sys ext4 crc16 jbd2 mbcache btrfs crc32c libcrc32c zlib_deflate dm_mod raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq linear md_mod ses hid_generic usbhid hid sg enclosure sd_mod crc_t10dif ehci_hcd ahci libahci microcode megaraid_sas e1000e usbcore usb_common libata scsi_mod
Mar  8 12:36:43 debblab kernel: [ 1201.049137] Pid: 5581, comm: nfsd Tainted: P           O 3.7-trunk-amd64 #1 Debian 3.7.8-1~experimental.1
Mar  8 12:36:43 debblab kernel: [ 1201.049139] Call Trace:
Mar  8 12:36:43 debblab kernel: [ 1201.049147]  [<ffffffff8103ced4>] ? warn_slowpath_common+0x76/0x8a
Mar  8 12:36:43 debblab kernel: [ 1201.049173]  [<ffffffffa0226080>] ? btrfs_log_inode_parent+0x291/0x2fd [btrfs]
Mar  8 12:36:43 debblab kernel: [ 1201.049198]  [<ffffffffa0226121>] ? btrfs_log_dentry_safe+0x35/0x4e [btrfs]
Mar  8 12:36:43 debblab kernel: [ 1201.049222]  [<ffffffffa0207284>] ? btrfs_sync_file+0x151/0x1e6 [btrfs]
Mar  8 12:36:43 debblab kernel: [ 1201.049246]  [<ffffffffa020858a>] ? btrfs_file_aio_write+0x373/0x3c4 [btrfs]
Mar  8 12:36:43 debblab kernel: [ 1201.049253]  [<ffffffff812cdeb8>] ? sch_direct_xmit+0x91/0x165
Mar  8 12:36:43 debblab kernel: [ 1201.049260]  [<ffffffff810436d3>] ? _local_bh_enable_ip.isra.11+0x1b/0x88
Mar  8 12:36:43 debblab kernel: [ 1201.049285]  [<ffffffffa0208217>] ? __btrfs_buffered_write+0x2e8/0x2e8 [btrfs]
Mar  8 12:36:43 debblab kernel: [ 1201.049290]  [<ffffffff81108952>] ? do_sync_readv_writev+0x57/0x94
Mar  8 12:36:43 debblab kernel: [ 1201.049296]  [<ffffffff81108b9b>] ? do_readv_writev+0x94/0x108
Mar  8 12:36:43 debblab kernel: [ 1201.049310]  [<ffffffffa044ba42>] ? seconds_since_boot+0x11/0x1a [sunrpc]
Mar  8 12:36:43 debblab kernel: [ 1201.049321]  [<ffffffffa04a9252>] ? nfsd_vfs_write.isra.8+0xc3/0x20e [nfsd]
Mar  8 12:36:43 debblab kernel: [ 1201.049328]  [<ffffffff8105d08d>] ? groups_alloc+0x32/0xb1
Mar  8 12:36:43 debblab kernel: [ 1201.049342]  [<ffffffffa04b92e5>] ? renew_client_locked+0x76/0x7f [nfsd]
Mar  8 12:36:43 debblab kernel: [ 1201.049355]  [<ffffffffa04b9306>] ? renew_client+0x18/0x25 [nfsd]
Mar  8 12:36:43 debblab kernel: [ 1201.049369]  [<ffffffffa04b935a>] ? find_confirmed_client+0x47/0x5c [nfsd]
Mar  8 12:36:43 debblab kernel: [ 1201.049379]  [<ffffffffa04aa9f9>] ? nfsd_write+0x7f/0xf0 [nfsd]
Mar  8 12:36:43 debblab kernel: [ 1201.049384]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Mar  8 12:36:43 debblab kernel: [ 1201.049396]  [<ffffffffa04b295b>] ? nfsd4_write+0xcb/0xf3 [nfsd]
Mar  8 12:36:43 debblab kernel: [ 1201.049409]  [<ffffffffa04b2518>] ? nfsd4_proc_compound+0x224/0x3b2 [nfsd]
Mar  8 12:36:43 debblab kernel: [ 1201.049419]  [<ffffffffa04a67b2>] ? nfsd_dispatch+0x93/0x148 [nfsd]
Mar  8 12:36:43 debblab kernel: [ 1201.049432]  [<ffffffffa04453c7>] ? svc_process_common+0x289/0x439 [sunrpc]
Mar  8 12:36:43 debblab kernel: [ 1201.049441]  [<ffffffffa04a6076>] ? nfsd_destroy.constprop.2+0x3c/0x3c [nfsd]
Mar  8 12:36:43 debblab kernel: [ 1201.049454]  [<ffffffffa0445f4e>] ? svc_process+0x111/0x12d [sunrpc]
Mar  8 12:36:43 debblab kernel: [ 1201.049463]  [<ffffffffa04a6120>] ? nfsd+0xaa/0xfe [nfsd]
Mar  8 12:36:43 debblab kernel: [ 1201.049468]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Mar  8 12:36:43 debblab kernel: [ 1201.049473]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Mar  8 12:36:43 debblab kernel: [ 1201.049479]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Mar  8 12:36:43 debblab kernel: [ 1201.049483]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Mar  8 12:36:43 debblab kernel: [ 1201.049486] ---[ end trace e0f3b8947f01aeba ]---
Mar  8 12:45:48 debblab kernel: [ 1745.405981] ------------[ cut here ]------------


Mar  8 12:45:48 debblab kernel: [ 1745.405981] ------------[ cut here ]------------
Mar  8 12:45:48 debblab kernel: [ 1745.406009] WARNING: at /build/buildd-linux_3.7.8-1~experimental.1-amd64-3TxQRS/linux-3.7.8/fs/btrfs/tree-log.c:3716 btrfs_log_inode_parent+0x291/0x2fd [btrfs]()
Mar  8 12:45:48 debblab kernel: [ 1745.406010] Hardware name: S3420GP
Mar  8 12:45:48 debblab kernel: [ 1745.406012] Modules linked in: sha256_generic cbc dm_crypt ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables parport_pc ppdev lp parport cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_stats fuse nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc bonding loop joydev snd_hda_codec_hdmi snd_hda_intel snd_hda_codec coretemp snd_hwdep iTCO_wdt snd_pcm iTCO_vendor_support snd_page_alloc kvm_intel snd_seq snd_seq_device fglrx(PO) snd_timer kvm evdev lpc_ich mfd_core snd soundcore i2c_i801 crc32c_intel pcspkr i2c_core i7core_edac edac_core acpi_cpufreq mperf processor button thermal_sys ext4 crc16 jbd2 mbcache btrfs crc32c libcrc32c zlib_deflate dm_mod raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq linear md_mod ses hid_generic usbhid hid sg enclosure sd_mod crc_t10dif ehci_hcd ahci libahci microcode megaraid_sas e1000e usbcore usb_common libata scsi_mod
Mar  8 12:45:48 debblab kernel: [ 1745.406058] Pid: 5588, comm: nfsd Tainted: P        W  O 3.7-trunk-amd64 #1 Debian 3.7.8-1~experimental.1
Mar  8 12:45:48 debblab kernel: [ 1745.406059] Call Trace:
Mar  8 12:45:48 debblab kernel: [ 1745.406065]  [<ffffffff8103ced4>] ? warn_slowpath_common+0x76/0x8a
Mar  8 12:45:48 debblab kernel: [ 1745.406078]  [<ffffffffa0226080>] ? btrfs_log_inode_parent+0x291/0x2fd [btrfs]
Mar  8 12:45:48 debblab kernel: [ 1745.406090]  [<ffffffffa0226121>] ? btrfs_log_dentry_safe+0x35/0x4e [btrfs]
Mar  8 12:45:48 debblab kernel: [ 1745.406105]  [<ffffffffa0207284>] ? btrfs_sync_file+0x151/0x1e6 [btrfs]
Mar  8 12:45:48 debblab kernel: [ 1745.406116]  [<ffffffffa020858a>] ? btrfs_file_aio_write+0x373/0x3c4 [btrfs]
Mar  8 12:45:48 debblab kernel: [ 1745.406120]  [<ffffffff812cdeb8>] ? sch_direct_xmit+0x91/0x165
Mar  8 12:45:48 debblab kernel: [ 1745.406128]  [<ffffffff810436d3>] ? _local_bh_enable_ip.isra.11+0x1b/0x88
Mar  8 12:45:48 debblab kernel: [ 1745.406140]  [<ffffffffa0208217>] ? __btrfs_buffered_write+0x2e8/0x2e8 [btrfs]
Mar  8 12:45:48 debblab kernel: [ 1745.406143]  [<ffffffff81108952>] ? do_sync_readv_writev+0x57/0x94
Mar  8 12:45:48 debblab kernel: [ 1745.406146]  [<ffffffff81108b9b>] ? do_readv_writev+0x94/0x108
Mar  8 12:45:48 debblab kernel: [ 1745.406153]  [<ffffffffa04a9252>] ? nfsd_vfs_write.isra.8+0xc3/0x20e [nfsd]
Mar  8 12:45:48 debblab kernel: [ 1745.406156]  [<ffffffff8105d08d>] ? groups_alloc+0x32/0xb1
Mar  8 12:45:48 debblab kernel: [ 1745.406163]  [<ffffffffa04b92e5>] ? renew_client_locked+0x76/0x7f [nfsd]
Mar  8 12:45:48 debblab kernel: [ 1745.406170]  [<ffffffffa04b9306>] ? renew_client+0x18/0x25 [nfsd]
Mar  8 12:45:48 debblab kernel: [ 1745.406177]  [<ffffffffa04b935a>] ? find_confirmed_client+0x47/0x5c [nfsd]
Mar  8 12:45:48 debblab kernel: [ 1745.406182]  [<ffffffffa04aa9f9>] ? nfsd_write+0x7f/0xf0 [nfsd]
Mar  8 12:45:48 debblab kernel: [ 1745.406185]  [<ffffffff81061433>] ? should_resched+0x5/0x23
Mar  8 12:45:48 debblab kernel: [ 1745.406191]  [<ffffffffa04b295b>] ? nfsd4_write+0xcb/0xf3 [nfsd]
Mar  8 12:45:48 debblab kernel: [ 1745.406198]  [<ffffffffa04b2518>] ? nfsd4_proc_compound+0x224/0x3b2 [nfsd]
Mar  8 12:45:48 debblab kernel: [ 1745.406202]  [<ffffffffa04a67b2>] ? nfsd_dispatch+0x93/0x148 [nfsd]
Mar  8 12:45:48 debblab kernel: [ 1745.406210]  [<ffffffffa04453c7>] ? svc_process_common+0x289/0x439 [sunrpc]
Mar  8 12:45:48 debblab kernel: [ 1745.406214]  [<ffffffffa04a6076>] ? nfsd_destroy.constprop.2+0x3c/0x3c [nfsd]
Mar  8 12:45:48 debblab kernel: [ 1745.406221]  [<ffffffffa0445f4e>] ? svc_process+0x111/0x12d [sunrpc]
Mar  8 12:45:48 debblab kernel: [ 1745.406225]  [<ffffffffa04a6120>] ? nfsd+0xaa/0xfe [nfsd]
Mar  8 12:45:48 debblab kernel: [ 1745.406228]  [<ffffffff810571bc>] ? kthread+0x81/0x89
Mar  8 12:45:48 debblab kernel: [ 1745.406230]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Mar  8 12:45:48 debblab kernel: [ 1745.406234]  [<ffffffff8137dafc>] ? ret_from_fork+0x7c/0xb0
Mar  8 12:45:48 debblab kernel: [ 1745.406236]  [<ffffffff8105713b>] ? __kthread_parkme+0x5c/0x5c
Mar  8 12:45:48 debblab kernel: [ 1745.406237] ---[ end trace e0f3b8947f01aebb ]---


Mar 10 03:46:57 debblab kernel: [119097.031922] cp              D ffff88045fc53bc0     0  2319   2315 0x00000000
Mar 10 03:46:57 debblab kernel: [119097.031925]  ffff880118e10080 0000000000000082 ffff88006a059e28 ffff88044f0b3180
Mar 10 03:46:57 debblab kernel: [119097.031928]  0000000000013bc0 ffff88006a059fd8 ffff88006a059fd8 ffff880118e10080
Mar 10 03:46:57 debblab kernel: [119097.031930]  0000000000000246 ffff880101ecd7b0 ffff88044c2169e8 ffff88006a059dc0
Mar 10 03:46:57 debblab kernel: [119097.031933] Call Trace:
Mar 10 03:46:57 debblab kernel: [119097.031963]  [<ffffffffa0232044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 10 03:46:57 debblab kernel: [119097.031967]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 10 03:46:57 debblab kernel: [119097.031980]  [<ffffffffa023356b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 10 03:46:57 debblab kernel: [119097.031993]  [<ffffffffa023d62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 10 03:46:57 debblab kernel: [119097.031998]  [<ffffffff810fd239>] ? kmem_cache_alloc+0x8e/0xfd
Mar 10 03:46:57 debblab kernel: [119097.032001]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 10 03:46:57 debblab kernel: [119097.032004]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 10 03:46:57 debblab kernel: [119097.032006]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 10 03:46:57 debblab kernel: [119097.032010]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 10 03:48:57 debblab kernel: [119216.968016] cp              D ffff88045fc53bc0     0  2319   2315 0x00000000
Mar 10 03:48:57 debblab kernel: [119216.968023]  ffff880118e10080 0000000000000082 ffff88006a059e28 ffff88044f0b3180
Mar 10 03:48:57 debblab kernel: [119216.968029]  0000000000013bc0 ffff88006a059fd8 ffff88006a059fd8 ffff880118e10080
Mar 10 03:48:57 debblab kernel: [119216.968035]  0000000000000246 ffff880101ecd7b0 ffff88044c2169e8 ffff88006a059dc0
Mar 10 03:48:57 debblab kernel: [119216.968041] Call Trace:
Mar 10 03:48:57 debblab kernel: [119216.968074]  [<ffffffffa0232044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 10 03:48:57 debblab kernel: [119216.968078]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 10 03:48:57 debblab kernel: [119216.968093]  [<ffffffffa023356b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 10 03:48:57 debblab kernel: [119216.968105]  [<ffffffffa023d62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 10 03:48:57 debblab kernel: [119216.968109]  [<ffffffff810fd239>] ? kmem_cache_alloc+0x8e/0xfd
Mar 10 03:48:57 debblab kernel: [119216.968112]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 10 03:48:57 debblab kernel: [119216.968115]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 10 03:48:57 debblab kernel: [119216.968117]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 10 03:48:57 debblab kernel: [119216.968120]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 10 03:50:57 debblab kernel: [119336.903960] cp              D ffff88045fc53bc0     0  2319   2315 0x00000000
Mar 10 03:50:57 debblab kernel: [119336.903963]  ffff880118e10080 0000000000000082 ffff88006a059e28 ffff88044f0b3180
Mar 10 03:50:57 debblab kernel: [119336.903966]  0000000000013bc0 ffff88006a059fd8 ffff88006a059fd8 ffff880118e10080
Mar 10 03:50:57 debblab kernel: [119336.903968]  0000000000000246 ffff880101ecd7b0 ffff88044c2169e8 ffff88006a059dc0
Mar 10 03:50:57 debblab kernel: [119336.903971] Call Trace:
Mar 10 03:50:57 debblab kernel: [119336.903999]  [<ffffffffa0232044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 10 03:50:57 debblab kernel: [119336.904004]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 10 03:50:57 debblab kernel: [119336.904016]  [<ffffffffa023356b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 10 03:50:57 debblab kernel: [119336.904029]  [<ffffffffa023d62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 10 03:50:57 debblab kernel: [119336.904034]  [<ffffffff810fd239>] ? kmem_cache_alloc+0x8e/0xfd
Mar 10 03:50:57 debblab kernel: [119336.904037]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 10 03:50:57 debblab kernel: [119336.904040]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 10 03:50:57 debblab kernel: [119336.904042]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 10 03:50:57 debblab kernel: [119336.904046]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 10 03:52:57 debblab kernel: [119456.839982] cp              D ffff88045fc53bc0     0  2319   2315 0x00000000
Mar 10 03:52:57 debblab kernel: [119456.839985]  ffff880118e10080 0000000000000082 ffff88006a059e28 ffff88044f0b3180
Mar 10 03:52:57 debblab kernel: [119456.839988]  0000000000013bc0 ffff88006a059fd8 ffff88006a059fd8 ffff880118e10080
Mar 10 03:52:57 debblab kernel: [119456.839991]  0000000000000246 ffff880101ecd7b0 ffff88044c2169e8 ffff88006a059dc0
Mar 10 03:52:57 debblab kernel: [119456.839994] Call Trace:
Mar 10 03:52:57 debblab kernel: [119456.840023]  [<ffffffffa0232044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 10 03:52:57 debblab kernel: [119456.840028]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 10 03:52:57 debblab kernel: [119456.840040]  [<ffffffffa023356b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 10 03:52:57 debblab kernel: [119456.840053]  [<ffffffffa023d62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 10 03:52:57 debblab kernel: [119456.840057]  [<ffffffff810fd239>] ? kmem_cache_alloc+0x8e/0xfd
Mar 10 03:52:57 debblab kernel: [119456.840061]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 10 03:52:57 debblab kernel: [119456.840064]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 10 03:52:57 debblab kernel: [119456.840067]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 10 03:52:57 debblab kernel: [119456.840071]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 10 05:36:57 debblab kernel: [125693.512982] cp              D ffff88045fc53bc0     0  2319   2315 0x00000000
Mar 10 05:36:57 debblab kernel: [125693.512985]  ffff880118e10080 0000000000000082 ffffffff00000003 ffff88044f0b3180
Mar 10 05:36:57 debblab kernel: [125693.512988]  0000000000013bc0 ffff88006a059fd8 ffff88006a059fd8 ffff880118e10080
Mar 10 05:36:57 debblab kernel: [125693.512991]  0000000000000246 ffff880111413370 ffff88044c2169e8 ffff88006a059dc0
Mar 10 05:36:57 debblab kernel: [125693.512994] Call Trace:
Mar 10 05:36:57 debblab kernel: [125693.513024]  [<ffffffffa0232044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 10 05:36:57 debblab kernel: [125693.513028]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 10 05:36:57 debblab kernel: [125693.513041]  [<ffffffffa023356b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 10 05:36:57 debblab kernel: [125693.513054]  [<ffffffffa023d62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 10 05:36:57 debblab kernel: [125693.513066]  [<ffffffffa027efda>] ? btrfs_get_acl+0x145/0x158 [btrfs]
Mar 10 05:36:57 debblab kernel: [125693.513070]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 10 05:36:57 debblab kernel: [125693.513073]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 10 05:36:57 debblab kernel: [125693.513075]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 10 05:36:57 debblab kernel: [125693.513079]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 10 05:38:57 debblab kernel: [125813.448996] cp              D ffff88045fc53bc0     0  2319   2315 0x00000000
Mar 10 05:38:57 debblab kernel: [125813.448999]  ffff880118e10080 0000000000000082 ffffffff00000003 ffff88044f0b3180
Mar 10 05:38:57 debblab kernel: [125813.449002]  0000000000013bc0 ffff88006a059fd8 ffff88006a059fd8 ffff880118e10080
Mar 10 05:38:57 debblab kernel: [125813.449005]  0000000000000246 ffff880111413370 ffff88044c2169e8 ffff88006a059dc0
Mar 10 05:38:57 debblab kernel: [125813.449008] Call Trace:
Mar 10 05:38:57 debblab kernel: [125813.449037]  [<ffffffffa0232044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 10 05:38:57 debblab kernel: [125813.449042]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 10 05:38:57 debblab kernel: [125813.449057]  [<ffffffffa023356b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 10 05:38:57 debblab kernel: [125813.449069]  [<ffffffffa023d62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 10 05:38:57 debblab kernel: [125813.449081]  [<ffffffffa027efda>] ? btrfs_get_acl+0x145/0x158 [btrfs]
Mar 10 05:38:57 debblab kernel: [125813.449084]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 10 05:38:57 debblab kernel: [125813.449088]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 10 05:38:57 debblab kernel: [125813.449090]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 10 05:38:57 debblab kernel: [125813.449093]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 10 05:40:57 debblab kernel: [125933.385094] cp              D ffff88045fc53bc0     0  2319   2315 0x00000000
Mar 10 05:40:57 debblab kernel: [125933.385098]  ffff880118e10080 0000000000000082 ffffffff00000003 ffff88044f0b3180
Mar 10 05:40:57 debblab kernel: [125933.385101]  0000000000013bc0 ffff88006a059fd8 ffff88006a059fd8 ffff880118e10080
Mar 10 05:40:57 debblab kernel: [125933.385103]  0000000000000246 ffff880111413370 ffff88044c2169e8 ffff88006a059dc0
Mar 10 05:40:57 debblab kernel: [125933.385106] Call Trace:
Mar 10 05:40:57 debblab kernel: [125933.385138]  [<ffffffffa0232044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 10 05:40:57 debblab kernel: [125933.385142]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 10 05:40:57 debblab kernel: [125933.385154]  [<ffffffffa023356b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 10 05:40:57 debblab kernel: [125933.385167]  [<ffffffffa023d62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 10 05:40:57 debblab kernel: [125933.385179]  [<ffffffffa027efda>] ? btrfs_get_acl+0x145/0x158 [btrfs]
Mar 10 05:40:57 debblab kernel: [125933.385182]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 10 05:40:57 debblab kernel: [125933.385185]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 10 05:40:57 debblab kernel: [125933.385188]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 10 05:40:57 debblab kernel: [125933.385191]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 10 05:42:57 debblab kernel: [126053.321108] cp              D ffff88045fc53bc0     0  2319   2315 0x00000000
Mar 10 05:42:57 debblab kernel: [126053.321111]  ffff880118e10080 0000000000000082 ffffffff00000003 ffff88044f0b3180
Mar 10 05:42:57 debblab kernel: [126053.321114]  0000000000013bc0 ffff88006a059fd8 ffff88006a059fd8 ffff880118e10080
Mar 10 05:42:57 debblab kernel: [126053.321117]  0000000000000246 ffff880111413370 ffff88044c2169e8 ffff88006a059dc0
Mar 10 05:42:57 debblab kernel: [126053.321120] Call Trace:
Mar 10 05:42:57 debblab kernel: [126053.321148]  [<ffffffffa0232044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 10 05:42:57 debblab kernel: [126053.321152]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 10 05:42:57 debblab kernel: [126053.321165]  [<ffffffffa023356b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 10 05:42:57 debblab kernel: [126053.321178]  [<ffffffffa023d62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 10 05:42:57 debblab kernel: [126053.321190]  [<ffffffffa027efda>] ? btrfs_get_acl+0x145/0x158 [btrfs]
Mar 10 05:42:57 debblab kernel: [126053.321194]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 10 05:42:57 debblab kernel: [126053.321198]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 10 05:42:57 debblab kernel: [126053.321200]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 10 05:42:57 debblab kernel: [126053.321204]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 10 08:36:55 debblab kernel: [136487.758753] rm              D ffff88045fc13bc0     0  1611   2315 0x00000000
Mar 10 08:36:55 debblab kernel: [136487.758756]  ffff8803633557e0 0000000000000082 ffff88010f8d7ac0 ffffffff81614400
Mar 10 08:36:55 debblab kernel: [136487.758759]  0000000000013bc0 ffff880102bb7fd8 ffff880102bb7fd8 ffff8803633557e0
Mar 10 08:36:55 debblab kernel: [136487.758762]  0000000000000246 ffff880248a537b0 ffff88044c2169e8 ffff880102bb7d10
Mar 10 08:36:55 debblab kernel: [136487.758765] Call Trace:
Mar 10 08:36:55 debblab kernel: [136487.758793]  [<ffffffffa0232044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 10 08:36:55 debblab kernel: [136487.758797]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 10 08:36:55 debblab kernel: [136487.758810]  [<ffffffffa023356b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 10 08:36:55 debblab kernel: [136487.758822]  [<ffffffffa0233f09>] ? __unlink_start_trans+0x46/0x37f [btrfs]
Mar 10 08:36:55 debblab kernel: [136487.758835]  [<ffffffffa023c063>] ? btrfs_lookup_dentry+0xc3/0x381 [btrfs]
Mar 10 08:36:55 debblab kernel: [136487.758838]  [<ffffffff8111baae>] ? __d_alloc+0x3f/0x141
Mar 10 08:36:55 debblab kernel: [136487.758841]  [<ffffffff81046166>] ? ns_capable+0x30/0x43
Mar 10 08:36:55 debblab kernel: [136487.758843]  [<ffffffff8111ab35>] ? __d_rehash+0x19/0x4c
Mar 10 08:36:55 debblab kernel: [136487.758856]  [<ffffffffa023a11f>] ? btrfs_unlink+0x22/0x97 [btrfs]
Mar 10 08:36:55 debblab kernel: [136487.758859]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 10 08:36:55 debblab kernel: [136487.758864]  [<ffffffff813811f2>] ? _cond_resched+0x6/0x1b
Mar 10 08:36:55 debblab kernel: [136487.758867]  [<ffffffff81114f0d>] ? vfs_unlink+0x63/0xbc
Mar 10 08:36:55 debblab kernel: [136487.758869]  [<ffffffff81115048>] ? do_unlinkat+0xe2/0x18c
Mar 10 08:36:55 debblab kernel: [136487.758873]  [<ffffffff81139cea>] ? fsnotify_find_inode_mark+0x58/0x60
Mar 10 08:36:55 debblab kernel: [136487.758876]  [<ffffffff8110c12a>] ? fput+0x10/0xae
Mar 10 08:36:55 debblab kernel: [136487.758878]  [<ffffffff8100e7ff>] ? math_state_restore+0xa0/0xe2
Mar 10 08:36:55 debblab kernel: [136487.758882]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b

Linux kernel upgrade:

Mar 10 17:52:22 debblab kernel: [    0.000000] Linux version 3.8-trunk-amd64 (debian-kernel@lists.debian.org) (gcc version 4.7.2 (Debian 4.7.2-5) ) #1 SMP Debian 3.8.2-1~experimental.1

But no luck: the problems are still there:

Mar 11 04:48:04 debblab kernel: [39339.584948] cp              D ffff88045fcd3bc0     0  2492   2209 0x00000000
Mar 11 04:48:04 debblab kernel: [39339.584951]  ffff88022ce86180 0000000000000082 ffffffff0000001c ffff88044f0b5040
Mar 11 04:48:04 debblab kernel: [39339.584954]  0000000000013bc0 ffff88002317ffd8 ffff88002317ffd8 ffff88022ce86180
Mar 11 04:48:04 debblab kernel: [39339.584956]  0000000000000246 ffff88015177ba70 ffff88044c3771e8 ffff88002317fdc0
Mar 11 04:48:04 debblab kernel: [39339.584959] Call Trace:
Mar 11 04:48:04 debblab kernel: [39339.584988]  [<ffffffffa0243044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 11 04:48:04 debblab kernel: [39339.584992]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 11 04:48:04 debblab kernel: [39339.585004]  [<ffffffffa024456b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 11 04:48:04 debblab kernel: [39339.585017]  [<ffffffffa024e62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 11 04:48:04 debblab kernel: [39339.585028]  [<ffffffffa028ffda>] ? btrfs_get_acl+0x145/0x158 [btrfs]
Mar 11 04:48:04 debblab kernel: [39339.585031]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 11 04:48:04 debblab kernel: [39339.585035]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 11 04:48:04 debblab kernel: [39339.585037]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 11 04:48:04 debblab kernel: [39339.585040]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 11 05:08:22 debblab kernel: [40557.263318] CE: hpet2 increased min_delta_ns to 20113 nsec
Mar 11 06:22:04 debblab kernel: [44976.577803] cp              D ffff88045fc13bc0     0  2492   2209 0x00000000
Mar 11 06:22:04 debblab kernel: [44976.577806]  ffff88022ce86180 0000000000000082 ffffffff0000001b ffffffff81614400
Mar 11 06:22:04 debblab kernel: [44976.577809]  0000000000013bc0 ffff88002317ffd8 ffff88002317ffd8 ffff88022ce86180
Mar 11 06:22:04 debblab kernel: [44976.577812]  0000000000000246 ffff880165c18770 ffff88044c3771e8 ffff88002317fdc0
Mar 11 06:22:04 debblab kernel: [44976.577814] Call Trace:
Mar 11 06:22:04 debblab kernel: [44976.577844]  [<ffffffffa0243044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 11 06:22:04 debblab kernel: [44976.577849]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 11 06:22:04 debblab kernel: [44976.577861]  [<ffffffffa024456b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 11 06:22:04 debblab kernel: [44976.577874]  [<ffffffffa024e62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 11 06:22:04 debblab kernel: [44976.577887]  [<ffffffffa028ffda>] ? btrfs_get_acl+0x145/0x158 [btrfs]
Mar 11 06:22:04 debblab kernel: [44976.577890]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 11 06:22:04 debblab kernel: [44976.577893]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 11 06:22:04 debblab kernel: [44976.577895]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 11 06:22:04 debblab kernel: [44976.577899]  [<ffffffff81381181>] ? __schedule+0x4b2/0x4e0
Mar 11 06:22:04 debblab kernel: [44976.577902]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 11 06:24:04 debblab kernel: [45096.513850] cp              D ffff88045fc13bc0     0  2492   2209 0x00000000
Mar 11 06:24:04 debblab kernel: [45096.513853]  ffff88022ce86180 0000000000000082 ffffffff0000001b ffffffff81614400
Mar 11 06:24:04 debblab kernel: [45096.513856]  0000000000013bc0 ffff88002317ffd8 ffff88002317ffd8 ffff88022ce86180
Mar 11 06:24:04 debblab kernel: [45096.513859]  0000000000000246 ffff880165c18770 ffff88044c3771e8 ffff88002317fdc0
Mar 11 06:24:04 debblab kernel: [45096.513862] Call Trace:
Mar 11 06:24:04 debblab kernel: [45096.513891]  [<ffffffffa0243044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 11 06:24:04 debblab kernel: [45096.513896]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 11 06:24:04 debblab kernel: [45096.513909]  [<ffffffffa024456b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 11 06:24:04 debblab kernel: [45096.513922]  [<ffffffffa024e62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 11 06:24:04 debblab kernel: [45096.513933]  [<ffffffffa028ffda>] ? btrfs_get_acl+0x145/0x158 [btrfs]
Mar 11 06:24:04 debblab kernel: [45096.513937]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 11 06:24:04 debblab kernel: [45096.513941]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 11 06:24:04 debblab kernel: [45096.513944]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 11 06:24:04 debblab kernel: [45096.513947]  [<ffffffff81381181>] ? __schedule+0x4b2/0x4e0
Mar 11 06:24:04 debblab kernel: [45096.513950]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 11 06:26:04 debblab kernel: [45216.449839] cp              D ffff88045fc13bc0     0  2492   2209 0x00000000
Mar 11 06:26:04 debblab kernel: [45216.449842]  ffff88022ce86180 0000000000000082 ffffffff0000001b ffffffff81614400
Mar 11 06:26:04 debblab kernel: [45216.449845]  0000000000013bc0 ffff88002317ffd8 ffff88002317ffd8 ffff88022ce86180
Mar 11 06:26:04 debblab kernel: [45216.449848]  0000000000000246 ffff880165c18770 ffff88044c3771e8 ffff88002317fdc0
Mar 11 06:26:04 debblab kernel: [45216.449851] Call Trace:
Mar 11 06:26:04 debblab kernel: [45216.449881]  [<ffffffffa0243044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 11 06:26:04 debblab kernel: [45216.449895]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 11 06:26:04 debblab kernel: [45216.449908]  [<ffffffffa024456b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 11 06:26:04 debblab kernel: [45216.449921]  [<ffffffffa024e62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 11 06:26:04 debblab kernel: [45216.449933]  [<ffffffffa028ffda>] ? btrfs_get_acl+0x145/0x158 [btrfs]
Mar 11 06:26:04 debblab kernel: [45216.449937]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 11 06:26:04 debblab kernel: [45216.449940]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 11 06:26:04 debblab kernel: [45216.449942]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 11 06:26:04 debblab kernel: [45216.449946]  [<ffffffff81381181>] ? __schedule+0x4b2/0x4e0
Mar 11 06:26:04 debblab kernel: [45216.449949]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 11 06:28:04 debblab kernel: [45336.385860] cp              D ffff88045fc13bc0     0  2492   2209 0x00000000
Mar 11 06:28:04 debblab kernel: [45336.385864]  ffff88022ce86180 0000000000000082 ffffffff0000001b ffffffff81614400
Mar 11 06:28:04 debblab kernel: [45336.385867]  0000000000013bc0 ffff88002317ffd8 ffff88002317ffd8 ffff88022ce86180
Mar 11 06:28:04 debblab kernel: [45336.385869]  0000000000000246 ffff880165c18770 ffff88044c3771e8 ffff88002317fdc0
Mar 11 06:28:04 debblab kernel: [45336.385872] Call Trace:
Mar 11 06:28:04 debblab kernel: [45336.385901]  [<ffffffffa0243044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 11 06:28:04 debblab kernel: [45336.385905]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 11 06:28:04 debblab kernel: [45336.385918]  [<ffffffffa024456b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 11 06:28:04 debblab kernel: [45336.385931]  [<ffffffffa024e62d>] ? btrfs_link+0x6b/0x169 [btrfs]
Mar 11 06:28:04 debblab kernel: [45336.385943]  [<ffffffffa028ffda>] ? btrfs_get_acl+0x145/0x158 [btrfs]
Mar 11 06:28:04 debblab kernel: [45336.385946]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 11 06:28:04 debblab kernel: [45336.385949]  [<ffffffff81114ae1>] ? vfs_link+0xdb/0x142
Mar 11 06:28:04 debblab kernel: [45336.385952]  [<ffffffff81116d2a>] ? sys_linkat+0x172/0x1ef
Mar 11 06:28:04 debblab kernel: [45336.385955]  [<ffffffff81381181>] ? __schedule+0x4b2/0x4e0
Mar 11 06:28:04 debblab kernel: [45336.385958]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b


Mar 11 09:58:03 debblab kernel: [57929.667936] rm              D ffff88045fc13bc0     0 21244   2209 0x00000000
Mar 11 09:58:03 debblab kernel: [57929.667939]  ffff8801a5bc2140 0000000000000082 ffff8801340835b0 ffff88044e3fa140
Mar 11 09:58:03 debblab kernel: [57929.667942]  0000000000013bc0 ffff88019923bfd8 ffff88019923bfd8 ffff8801a5bc2140
Mar 11 09:58:03 debblab kernel: [57929.667945]  0000000000000246 ffff8802f1b780b0 ffff88044c3771e8 ffff88019923bd10
Mar 11 09:58:03 debblab kernel: [57929.667948] Call Trace:
Mar 11 09:58:03 debblab kernel: [57929.667977]  [<ffffffffa0243044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 11 09:58:03 debblab kernel: [57929.667981]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 11 09:58:03 debblab kernel: [57929.667994]  [<ffffffffa024456b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 11 09:58:03 debblab kernel: [57929.668006]  [<ffffffffa0244f09>] ? __unlink_start_trans+0x46/0x37f [btrfs]
Mar 11 09:58:03 debblab kernel: [57929.668019]  [<ffffffffa024d063>] ? btrfs_lookup_dentry+0xc3/0x381 [btrfs]
Mar 11 09:58:03 debblab kernel: [57929.668023]  [<ffffffff810fd239>] ? kmem_cache_alloc+0x8e/0xfd
Mar 11 09:58:03 debblab kernel: [57929.668025]  [<ffffffff81046166>] ? ns_capable+0x30/0x43
Mar 11 09:58:03 debblab kernel: [57929.668029]  [<ffffffff8111ab35>] ? __d_rehash+0x19/0x4c
Mar 11 09:58:03 debblab kernel: [57929.668042]  [<ffffffffa024b11f>] ? btrfs_unlink+0x22/0x97 [btrfs]
Mar 11 09:58:03 debblab kernel: [57929.668045]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 11 09:58:03 debblab kernel: [57929.668050]  [<ffffffff813811f2>] ? _cond_resched+0x6/0x1b
Mar 11 09:58:03 debblab kernel: [57929.668053]  [<ffffffff81114f0d>] ? vfs_unlink+0x63/0xbc
Mar 11 09:58:03 debblab kernel: [57929.668056]  [<ffffffff81115048>] ? do_unlinkat+0xe2/0x18c
Mar 11 09:58:03 debblab kernel: [57929.668059]  [<ffffffff81139cea>] ? fsnotify_find_inode_mark+0x58/0x60
Mar 11 09:58:03 debblab kernel: [57929.668062]  [<ffffffff8110c12a>] ? fput+0x10/0xae
Mar 11 09:58:03 debblab kernel: [57929.668065]  [<ffffffff8100e7ff>] ? math_state_restore+0xa0/0xe2
Mar 11 09:58:03 debblab kernel: [57929.668068]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b
Mar 11 10:00:03 debblab kernel: [58049.603979] rm              D ffff88045fc13bc0     0 21244   2209 0x00000000
Mar 11 10:00:03 debblab kernel: [58049.603982]  ffff8801a5bc2140 0000000000000082 ffff8801340835b0 ffff88044e3fa140
Mar 11 10:00:03 debblab kernel: [58049.603985]  0000000000013bc0 ffff88019923bfd8 ffff88019923bfd8 ffff8801a5bc2140
Mar 11 10:00:03 debblab kernel: [58049.603988]  0000000000000246 ffff8802f1b780b0 ffff88044c3771e8 ffff88019923bd10
Mar 11 10:00:03 debblab kernel: [58049.603991] Call Trace:
Mar 11 10:00:03 debblab kernel: [58049.604020]  [<ffffffffa0243044>] ? wait_current_trans.isra.29+0xb3/0xe7 [btrfs]
Mar 11 10:00:03 debblab kernel: [58049.604025]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 11 10:00:03 debblab kernel: [58049.604037]  [<ffffffffa024456b>] ? start_transaction+0x3d4/0x410 [btrfs]
Mar 11 10:00:03 debblab kernel: [58049.604050]  [<ffffffffa0244f09>] ? __unlink_start_trans+0x46/0x37f [btrfs]
Mar 11 10:00:03 debblab kernel: [58049.604063]  [<ffffffffa024d063>] ? btrfs_lookup_dentry+0xc3/0x381 [btrfs]
Mar 11 10:00:03 debblab kernel: [58049.604067]  [<ffffffff810fd239>] ? kmem_cache_alloc+0x8e/0xfd
Mar 11 10:00:03 debblab kernel: [58049.604070]  [<ffffffff81046166>] ? ns_capable+0x30/0x43
Mar 11 10:00:03 debblab kernel: [58049.604073]  [<ffffffff8111ab35>] ? __d_rehash+0x19/0x4c
Mar 11 10:00:03 debblab kernel: [58049.604086]  [<ffffffffa024b11f>] ? btrfs_unlink+0x22/0x97 [btrfs]
Mar 11 10:00:03 debblab kernel: [58049.604089]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 11 10:00:03 debblab kernel: [58049.604093]  [<ffffffff813811f2>] ? _cond_resched+0x6/0x1b
Mar 11 10:00:03 debblab kernel: [58049.604097]  [<ffffffff81114f0d>] ? vfs_unlink+0x63/0xbc
Mar 11 10:00:03 debblab kernel: [58049.604099]  [<ffffffff81115048>] ? do_unlinkat+0xe2/0x18c
Mar 11 10:00:03 debblab kernel: [58049.604103]  [<ffffffff81139cea>] ? fsnotify_find_inode_mark+0x58/0x60
Mar 11 10:00:03 debblab kernel: [58049.604105]  [<ffffffff8110c12a>] ? fput+0x10/0xae
Mar 11 10:00:03 debblab kernel: [58049.604108]  [<ffffffff8100e7ff>] ? math_state_restore+0xa0/0xe2
Mar 11 10:00:03 debblab kernel: [58049.604111]  [<ffffffff81386fe9>] ? system_call_fastpath+0x16/0x1b

Crash even with latest Linux kernel:

Mar 11 14:24:16 debblab kernel: [73894.285764] ------------[ cut here ]------------
Mar 11 14:24:16 debblab kernel: [73894.285793] WARNING: at /build/buildd-linux_3.8.2-1~experimental.1-amd64-9iFbgL/linux-3.8.2/fs/btrfs/inode.c:2214 btrfs_orphan_commit_root+0xce/0xe8 [btrfs]()
Mar 11 14:24:16 debblab kernel: [73894.285795] Hardware name: S3420GP
Mar 11 14:24:16 debblab kernel: [73894.285796] Modules linked in: nilfs2 sha256_generic cbc dm_crypt ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables parport_pc ppdev lp parport cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_stats pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) fuse nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc bonding loop joydev snd_hda_codec_hdmi snd_hda_intel coretemp snd_hda_codec fglrx(PO) iTCO_wdt kvm_intel iTCO_vendor_support snd_hwdep snd_pcm evdev kvm snd_page_alloc snd_seq pcspkr crc32c_intel snd_seq_device i7core_edac snd_timer edac_core i2c_i801 lpc_ich mfd_core i2c_core snd soundcore acpi_cpufreq mperf processor button thermal_sys ext4 crc16 jbd2 mbcache btrfs zlib_deflate crc32c libcrc32c dm_mod raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq linear md_mod hid_generic usbhid hid sg ses enclosure sd_mod crc_t10dif microcode ahci libahci libata megaraid_sas scsi_mod ehci_pci
Mar 11 14:24:16 debblab kernel: ehci_hcd usbcore e1000e usb_common
Mar 11 14:24:16 debblab kernel: [73894.285846] Pid: 5217, comm: btrfs-transacti Tainted: P           O 3.8-trunk-amd64 #1 Debian 3.8.2-1~experimental.1
Mar 11 14:24:16 debblab kernel: [73894.285847] Call Trace:
Mar 11 14:24:16 debblab kernel: [73894.285853]  [<ffffffff8103ce50>] ? warn_slowpath_common+0x76/0x8a
Mar 11 14:24:16 debblab kernel: [73894.285866]  [<ffffffffa02486f0>] ? btrfs_orphan_commit_root+0xce/0xe8 [btrfs]
Mar 11 14:24:16 debblab kernel: [73894.285877]  [<ffffffffa0290543>] ? commit_fs_roots.isra.25+0x96/0x142 [btrfs]
Mar 11 14:24:16 debblab kernel: [73894.285890]  [<ffffffffa0283ffd>] ? btrfs_scrub_pause+0xda/0xe9 [btrfs]
Mar 11 14:24:16 debblab kernel: [73894.285894]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 11 14:24:16 debblab kernel: [73894.285906]  [<ffffffffa0243982>] ? btrfs_commit_transaction+0x42c/0x930 [btrfs]
Mar 11 14:24:16 debblab kernel: [73894.285909]  [<ffffffff81057b7f>] ? abort_exclusive_wait+0x79/0x79
Mar 11 14:24:16 debblab kernel: [73894.285921]  [<ffffffffa024449a>] ? start_transaction+0x303/0x410 [btrfs]
Mar 11 14:24:16 debblab kernel: [73894.285923]  [<ffffffff81061412>] ? should_resched+0x5/0x23
Mar 11 14:24:16 debblab kernel: [73894.285934]  [<ffffffffa023d5b8>] ? transaction_kthread+0xe0/0x183 [btrfs]
Mar 11 14:24:16 debblab kernel: [73894.285945]  [<ffffffffa023d4d8>] ? try_to_freeze+0x2e/0x2e [btrfs]
Mar 11 14:24:16 debblab kernel: [73894.285956]  [<ffffffffa023d4d8>] ? try_to_freeze+0x2e/0x2e [btrfs]
Mar 11 14:24:16 debblab kernel: [73894.285958]  [<ffffffff810572a4>] ? kthread+0x81/0x89
Mar 11 14:24:16 debblab kernel: [73894.285961]  [<ffffffff81057223>] ? __kthread_parkme+0x5c/0x5c
Mar 11 14:24:16 debblab kernel: [73894.285964]  [<ffffffff81386f3c>] ? ret_from_fork+0x7c/0xb0
Mar 11 14:24:16 debblab kernel: [73894.285966]  [<ffffffff81057223>] ? __kthread_parkme+0x5c/0x5c
Mar 11 14:24:16 debblab kernel: [73894.285967] ---[ end trace 8cce0f177f5d0e9d ]---


Mar 11 23:39:30 debblab kernel: [107192.131117] PGD 0 
Mar 11 23:39:30 debblab kernel: [107192.131121] Oops: 0000 [#1] SMP 
Mar 11 23:39:30 debblab kernel: [107192.131125] Modules linked in: cpuid nilfs2 sha256_generic cbc dm_crypt ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables parport_pc ppdev lp parport cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_stats pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) fuse nfsd auth_rpcgss nfs_acl nfs lockd dns_resolver fscache sunrpc bonding loop joydev snd_hda_codec_hdmi snd_hda_intel coretemp snd_hda_codec fglrx(PO) iTCO_wdt kvm_intel iTCO_vendor_support snd_hwdep snd_pcm evdev kvm snd_page_alloc snd_seq pcspkr crc32c_intel snd_seq_device i7core_edac snd_timer edac_core i2c_i801 lpc_ich mfd_core i2c_core snd soundcore acpi_cpufreq mperf processor button thermal_sys ext4 crc16 jbd2 mbcache btrfs zlib_deflate crc32c libcrc32c dm_mod raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq linear md_mod hid_generic usbhid hid sg ses enclosure sd_mod crc_t10dif microcode ahci libahci libata megaraid_sas scsi_mod e
Mar 11 23:39:30 debblab kernel: hci_pci ehci_hcd usbcore e1000e usb_common
Mar 11 23:39:30 debblab kernel: [107192.131231] CPU 3 
Mar 11 23:39:30 debblab kernel: [107192.131237] Pid: 5216, comm: btrfs-cleaner Tainted: P        W  O 3.8-trunk-amd64 #1 Debian 3.8.2-1~experimental.1 Intel Corporation S3420GP/S3420GP
Mar 11 23:39:30 debblab kernel: [107192.131242] RIP: 0010:[<ffffffffa022d9e3>]  [<ffffffffa022d9e3>] block_rsv_release_bytes+0x1f/0x10d [btrfs]
Mar 11 23:39:30 debblab kernel: [107192.131262] RSP: 0018:ffff880423945d68  EFLAGS: 00010202
Mar 11 23:39:30 debblab kernel: [107192.131266] RAX: 0000000000000000 RBX: 0000000000018000 RCX: 0000000000018000
Mar 11 23:39:30 debblab kernel: [107192.131269] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000018
Mar 11 23:39:30 debblab kernel: [107192.131272] RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000004edd5
Mar 11 23:39:30 debblab kernel: [107192.131275] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
Mar 11 23:39:30 debblab kernel: [107192.131278] R13: ffff88044c24b450 R14: ffff880442cd4000 R15: 0000000000000018
Mar 11 23:39:30 debblab kernel: [107192.131282] FS:  0000000000000000(0000) GS:ffff88045fcc0000(0000) knlGS:0000000000000000
Mar 11 23:39:30 debblab kernel: [107192.131286] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Mar 11 23:39:30 debblab kernel: [107192.131289] CR2: 0000000000000010 CR3: 000000000160c000 CR4: 00000000000007e0
Mar 11 23:39:30 debblab kernel: [107192.131292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Mar 11 23:39:30 debblab kernel: [107192.131295] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Mar 11 23:39:30 debblab kernel: [107192.131299] Process btrfs-cleaner (pid: 5216, threadinfo ffff880423944000, task ffff88044d1ba180)
Mar 11 23:39:30 debblab kernel: [107192.131301] Stack:
Mar 11 23:39:30 debblab kernel: [107192.131304]  ffff88044c24b450 ffff8802531301d0 ffff88044c24b000 ffff880357a53338
Mar 11 23:39:30 debblab kernel: [107192.131310]  ffff88044c24b450 00000000ffffffff 00000000ffffffff ffffffffa02488bd
Mar 11 23:39:30 debblab kernel: [107192.131316]  0000000000000078 ffff88044c24b000 ffff8802531301d0 ffff880357a53338
Mar 11 23:39:30 debblab kernel: [107192.131322] Call Trace:
Mar 11 23:39:30 debblab kernel: [107192.131353]  [<ffffffffa02488bd>] ? btrfs_orphan_del+0x86/0xa0 [btrfs]
Mar 11 23:39:30 debblab kernel: [107192.131382]  [<ffffffffa024c600>] ? btrfs_evict_inode+0x215/0x295 [btrfs]
Mar 11 23:39:30 debblab kernel: [107192.131391]  [<ffffffff8111d9c3>] ? evict+0xa3/0x153
Mar 11 23:39:30 debblab kernel: [107192.131420]  [<ffffffffa0248606>] ? btrfs_run_delayed_iputs+0xcb/0xe7 [btrfs]
Mar 11 23:39:30 debblab kernel: [107192.131446]  [<ffffffffa023d65b>] ? transaction_kthread+0x183/0x183 [btrfs]
Mar 11 23:39:30 debblab kernel: [107192.131472]  [<ffffffffa023d69e>] ? cleaner_kthread+0x43/0xbd [btrfs]
Mar 11 23:39:30 debblab kernel: [107192.131478]  [<ffffffff810572a4>] ? kthread+0x81/0x89
Mar 11 23:39:30 debblab kernel: [107192.131484]  [<ffffffff81057223>] ? __kthread_parkme+0x5c/0x5c
Mar 11 23:39:30 debblab kernel: [107192.131490]  [<ffffffff81386f3c>] ? ret_from_fork+0x7c/0xb0
Mar 11 23:39:30 debblab kernel: [107192.131496]  [<ffffffff81057223>] ? __kthread_parkme+0x5c/0x5c
Mar 11 23:39:30 debblab kernel: [107192.131498] Code: 5b 5b 5d 41 5c 41 5d 41 5e 41 5f c3 41 57 4c 8d 7e 18 41 56 49 89 fe 4c 89 ff 41 55 41 54 49 89 d4 55 48 89 f5 53 48 89 cb 41 55 <4c> 8b 6e 10 e8 28 f9 ff ff 48 8b 45 00 48 83 fb ff 48 8b 55 08 
Mar 11 23:39:30 debblab kernel: [107192.131563]  RSP <ffff880423945d68>
Mar 11 23:39:30 debblab kernel: [107192.131566] CR2: 0000000000000010
Mar 11 23:39:30 debblab kernel: [107192.131570] ---[ end trace 8cce0f177f5d0e9e ]---

Although Btrfs was stable during benchmark we experienced several crashes on concurrent access during Btrfs trial. Operating system continued to work but access to Btrfs partition stopped and no applications accessing it could be terminated, neither it was possible to unmount or browse Btrfs partition after crash.

Conclusion

Btrfs demonstrated very poor scalability. In this test the file system is relatively small with just under 500 GiB of data but Btrfs were getting slower and slower as more files were copied to partition.

Practical use of Btrfs on large partition (> 6 TiB) is difficult due to lag and general file system slowness especially during concurrent access.

Deleting files from Btrfs is very slow. Btrfs appears to noticeably suffer from fragmentation.

Considering troubles with concurrent access and numerous kernel warnings and crashes Btrfs is not ready for serious use even with latest Linux-3.8 kernel.

On the good side, we didn't see any data corruption found on Btrfs.

Update 2013-04

Since upgrade to Linux-3.8.3 (and later to Linux-3.8.5) we experienced no Btrfs crashes whatsoever.

See also