Hi
I decided to try full defrag on my btrfs array today. Sadly the system
crashed after a few hours.
No data lost as far as I have seen after reboot and the filesystem is
mounted and seemingly ok now.
Any ideas?
Hardware:
CPU: Intel Xeon X3430
MB: Supermicro X8SI6-F
RAM: 16GB (4x4GB) Samsung ECC/Unbuffered DDR3 1333mhz CL9
(MEM-DR340L-SL01-EU13)
HDDs in btrfs RAID10: 4 x Western Digital Se 4TB 64MB 7200RPM SATA
6Gb/s (WD4000F9YZ)
HBAs: LSI SAS 9211-8i, LSI SAS 9201-16i
Software:
- Kernel v3.11.5. Debian standard config for 3.2 + olddefconfig
- Debian Wheezy 7.2 64-bit
- btrfs-progs v0.20-rc1
- Command in screen shell (screen -l -S defrag):
---
sudo find /btrfs/storage-vol0 -xdev \( -type f -o -type d \) -exec
btrfs filesystem defragment -- {} +
----
btrfs fi df /btrfs/storage-vol0/
-----
Data, RAID10: total=6.73TB, used=6.22TB
Data: total=8.00MB, used=0.00
System, RAID10: total=16.00MB, used=744.00KB
System: total=4.00MB, used=0.00
Metadata, RAID10: total=10.00GB, used=8.76GB
Metadata: total=8.00MB, used=0.00
-----
btrfs fi show --all-devices
-----
Label: none uuid: b64daec7-6c14-4996-94b3-80c6abfa26ce
Total devices 4 FS bytes used 6.22TB
devid 2 size 3.64TB used 3.37TB path /dev/sdm
devid 4 size 3.64TB used 3.37TB path /dev/sdo
devid 1 size 3.64TB used 3.37TB path /dev/sdl
devid 3 size 3.64TB used 3.37TB path /dev/sdn
-----
cat /etc/fstab | grep btrfs
-----
UUID=b64daec7-6c14-4996-94b3-80c6abfa26ce /btrfs
btrfs defaults,compress=lzo 0 2
UUID=b64daec7-6c14-4996-94b3-80c6abfa26ce /storage/storage-vol0
btrfs defaults,subvol=storage-vol0 0 2
-----
btrfs subvolume list /storage/storage-vol0/
-----
ID 259 gen 63363 top level 5 path storage-vol0
ID 4162 gen 63356 top level 5 path backups/storage-vol0_2013-10-18_182648
ID 4163 gen 63356 top level 5 path backups/storage-vol0_2013-10-18_183302
ID 4164 gen 63356 top level 5 path backups/storage-vol0_2013-10-18_213301
ID 4165 gen 63356 top level 5 path backups/storage-vol0_2013-10-19_003301
ID 4166 gen 63356 top level 5 path backups/storage-vol0_2013-10-19_033301
ID 4167 gen 63356 top level 5 path backups/storage-vol0_2013-10-19_063301
ID 4168 gen 63356 top level 5 path backups/storage-vol0_2013-10-19_093301
ID 4169 gen 63356 top level 5 path backups/storage-vol0_2013-10-19_115516
ID 4170 gen 63356 top level 5 path backups/storage-vol0_2013-10-19_115534
ID 4171 gen 63356 top level 5 path backups/storage-vol0_2013-10-19_123301
ID 4172 gen 63356 top level 5 path backups/storage-vol0_2013-10-19_153301
ID 4173 gen 63356 top level 5 path backups/storage-vol0_2013-10-19_183301
ID 4174 gen 63356 top level 5 path backups/storage-vol0_2013-10-19_213301
ID 4175 gen 63356 top level 5 path backups/storage-vol0_2013-10-20_003301
ID 4176 gen 63356 top level 5 path backups/storage-vol0_2013-10-20_033301
ID 4177 gen 63356 top level 5 path backups/storage-vol0_2013-10-20_063301
ID 4178 gen 63356 top level 5 path backups/storage-vol0_2013-10-20_093301
ID 4179 gen 63356 top level 5 path backups/storage-vol0_2013-10-20_123301
ID 4180 gen 63356 top level 5 path backups/storage-vol0_2013-10-20_153301
ID 4181 gen 63356 top level 5 path backups/storage-vol0_2013-10-20_183301
ID 4182 gen 63356 top level 5 path backups/storage-vol0_2013-10-20_213301
ID 4183 gen 63356 top level 5 path backups/storage-vol0_2013-10-21_003301
ID 4184 gen 63356 top level 5 path backups/storage-vol0_2013-10-21_033301
ID 4185 gen 63356 top level 5 path backups/storage-vol0_2013-10-21_063301
ID 4186 gen 63356 top level 5 path backups/storage-vol0_2013-10-21_093301
ID 4187 gen 63356 top level 5 path backups/storage-vol0_2013-10-21_123301
ID 4188 gen 63356 top level 5 path backups/storage-vol0_2013-10-21_153301
----
Error message in /var/log/syslog
----
Oct 21 13:20:54 merkur kernel: [150476.396320] INFO: task
kworker/u16:0:10146 blocked for more than 120 seconds.
Oct 21 13:20:54 merkur kernel: [150476.396346] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Oct 21 13:20:54 merkur kernel: [150476.396364] kworker/u16:0 D
ffff88043fc92ec0 0 10146 2 0x00000000
Oct 21 13:20:54 merkur kernel: [150476.396375] Workqueue: writeback
bdi_writeback_workfn (flush-btrfs-1)
Oct 21 13:20:54 merkur kernel: [150476.396378] ffff880224535180
0000000000000046 ffff88042f0c5180 0000000000000000
Oct 21 13:20:54 merkur kernel: [150476.396383] 0000000000012ec0
ffff8800618f1fd8 ffff8800618f1fd8 ffff880224535180
Oct 21 13:20:54 merkur kernel: [150476.396387] 0000000000000246
ffff88010e6bdd78 ffff8804218b79e8 ffff8800618f1740
Oct 21 13:20:54 merkur kernel: [150476.396392] Call Trace:
Oct 21 13:20:54 merkur kernel: [150476.396430] [<ffffffffa0181bb1>] ?
wait_current_trans.isra.28+0xbc/0x117 [btrfs]
Oct 21 13:20:54 merkur kernel: [150476.396436] [<ffffffff8104fd15>] ?
wake_up_atomic_t+0x22/0x22
Oct 21 13:20:54 merkur kernel: [150476.396458] [<ffffffffa01834df>] ?
start_transaction+0x1d3/0x46d [btrfs]
Oct 21 13:20:54 merkur kernel: [150476.396481] [<ffffffffa01886b5>] ?
run_delalloc_nocow+0xa2/0x7aa [btrfs]
Oct 21 13:20:54 merkur kernel: [150476.396505] [<ffffffffa0197f62>] ?
__set_extent_bit+0x329/0x36d [btrfs]
Oct 21 13:20:54 merkur kernel: [150476.396529] [<ffffffffa0188ee6>] ?
run_delalloc_range+0x64/0x333 [btrfs]
Oct 21 13:20:54 merkur kernel: [150476.396553] [<ffffffffa0197a24>] ?
free_extent_state+0x12/0x21 [btrfs]
Oct 21 13:20:54 merkur kernel: [150476.396576] [<ffffffffa019a779>] ?
__extent_writepage+0x1e5/0x62a [btrfs]
Oct 21 13:20:54 merkur kernel: [150476.396592] [<ffffffffa0007444>] ?
scsi_request_fn+0x411/0x4e8 [scsi_mod]
Oct 21 13:20:54 merkur kernel: [150476.396598] [<ffffffff810be424>] ?
find_get_pages_tag+0x66/0x121
Oct 21 13:20:54 merkur kernel: [150476.396622] [<ffffffffa019ad08>] ?
extent_write_cache_pages.isra.23.constprop.45+0x14a/0x255 [btrfs]
Oct 21 13:20:54 merkur kernel: [150476.396645] [<ffffffffa018461f>] ?
btrfs_submit_bio_hook+0x14f/0x14f [btrfs]
Oct 21 13:20:54 merkur kernel: [150476.396669] [<ffffffffa019b04f>] ?
extent_writepages+0x49/0x60 [btrfs]
Oct 21 13:20:54 merkur kernel: [150476.396692] [<ffffffffa01865cf>] ?
btrfs_submit_direct+0x3c8/0x3c8 [btrfs]
Oct 21 13:20:54 merkur kernel: [150476.396697] [<ffffffff811202b0>] ?
__writeback_single_inode+0x6d/0x1e8
Oct 21 13:20:54 merkur kernel: [150476.396701] [<ffffffff81120af4>] ?
writeback_sb_inodes+0x1f0/0x322
Oct 21 13:20:54 merkur kernel: [150476.396705] [<ffffffff81120c8f>] ?
__writeback_inodes_wb+0x69/0xab
Oct 21 13:20:54 merkur kernel: [150476.396709] [<ffffffff81120e07>] ?
wb_writeback+0x136/0x292
Oct 21 13:20:54 merkur kernel: [150476.396714] [<ffffffff8104c295>] ?
set_worker_desc+0x61/0x6c
Oct 21 13:20:54 merkur kernel: [150476.396718] [<ffffffff81121784>] ?
bdi_writeback_workfn+0xc1/0x29f
Oct 21 13:20:54 merkur kernel: [150476.396722] [<ffffffff81057304>] ?
mmdrop+0xd/0x1c
Oct 21 13:20:54 merkur kernel: [150476.396726] [<ffffffff81057ef7>] ?
finish_task_switch+0x7e/0xa8
Oct 21 13:20:54 merkur kernel: [150476.396731] [<ffffffff8104a540>] ?
process_one_work+0x191/0x294
Oct 21 13:20:54 merkur kernel: [150476.396735] [<ffffffff8104a9f2>] ?
worker_thread+0x121/0x1e7
Oct 21 13:20:54 merkur kernel: [150476.396740] [<ffffffff8104a8d1>] ?
rescuer_thread+0x269/0x269
Oct 21 13:20:54 merkur kernel: [150476.396744] [<ffffffff8104f375>] ?
kthread+0x81/0x89
Oct 21 13:20:54 merkur kernel: [150476.396748] [<ffffffff8104f2f4>] ?
__kthread_parkme+0x5d/0x5d
Oct 21 13:20:54 merkur kernel: [150476.396753] [<ffffffff81371f2c>] ?
ret_from_fork+0x7c/0xb0
Oct 21 13:20:54 merkur kernel: [150476.396757] [<ffffffff8104f2f4>] ?
__kthread_parkme+0x5d/0x5d
----
Mvh
Hans-Kristian Bakke
Mob: 91 76 17 38
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