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[dm-devel] Fix "dm kcopyd: Fix bug causing workqueue stalls" causes dead lock



Hello,
 We have drbd partition on top of lvm partition. when node having
secondary drbd partition is coming up, large amount of data will be
synced between primary to secondary drbd partitions.

During this time, we see the drbd Sync(Resync) stops at some point.
After 120 seconds we see hung-task-timeout warnings in the logs.(see
at the end of this email)

If i increase the cow_count semaphore value from 2048 to 8192 or
remove the below patch, drbd sync works seamlessly.

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/patch/?id=721b1d98fb517ae99ab3b757021cf81db41e67be

I am not familiar with dm code, from hung task back traces what i
understand is, when thread is trying to queue work to kcopyd, holding
"&_origins_lock" and blocked on cow_count lock,
jobs from kcopyd is trying to queue work to same kcopyd and blocked on
"&_origins_lock" and dead lock.

Below is the hung task back traces.
Sep 24 12:08:48.974658 err CFPU-1 kernel: [  279.991760] INFO: task
kworker/1:1:170 blocked for more than 120 seconds.
Sep 24 12:08:48.974658 err CFPU-1 kernel: [  279.998569]
Tainted: P           O    4.4.184-octeon-distro.git-v2.96-4-rc-wnd #1
Sep 24 12:08:48.974658 err CFPU-1 kernel: [  280.006593] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 24 12:08:48.974658 info CFPU-1 kernel: [  280.014435] kworker/1:1
   D ffffffff80e1db78     0   170      2 0x00100000
Sep 24 12:08:48.974658 info CFPU-1 kernel: [  280.014482] Workqueue:
kcopyd do_work [dm_mod]
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014487] Stack :
0000000000000000 0000000000000001 0003000300000000 80000007fde8bac8
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014487]
80000007fe759b00 0000000000000002 ffffffffc0285294 80000007f8d1ca00
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014487]
ffffffffc027eda8 0000000000000001 ffffffff80b30000 0000000000000100
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014487]
8000000784c098c8 ffffffff80e1db78 80000007fe759b00 ffffffff80e204b8
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014487]
8000000788ef79c0 800000078505ba70 80000007fe759b00 00000001852b4620
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014487]
ffffffffc0280000 80000007852b4620 80000007eebf5758 ffffffffc027edec
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014487]
0000000000000000 80000007852b4620 80000007835d8e80 ffffffffc027f38c
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014487]
8000000787ac0580 0000000000000001 80000007f8d1ca60 8000000785aeb080
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014487]
0000000000000000 0000000000000000 0000000000000200 ffffffffc0282488
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014487]
0000000000000200 80000007f8d1ca00 ffffffffc0280000 ffffffffc027db90
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014487]   ...
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014558] Call Trace:
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014570]
[<ffffffff80e1d4a8>] __schedule+0x3c0/0xa58
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014580]
[<ffffffff80e1db78>] schedule+0x38/0x98
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014590]
[<ffffffff80e204b8>] __down_read+0xa8/0xf0
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014609]
[<ffffffffc027edec>] do_origin.isra.13+0x44/0x110 [dm_snapshot]
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014625]
[<ffffffffc027f38c>] pending_complete+0x1ac/0x378 [dm_snapshot]
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014642]
[<ffffffffc0282488>] persistent_commit_exception+0x140/0x218
[dm_snapshot]
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014659]
[<ffffffffc027db90>] copy_callback+0x108/0x1a0 [dm_snapshot]
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014688]
[<ffffffffc01eb6a4>] run_complete_job+0x8c/0x148 [dm_mod]
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014724]
[<ffffffffc01eaae8>] process_jobs+0xc8/0x1e0 [dm_mod]
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014759]
[<ffffffffc01eb1e0>] do_work+0xb8/0x110 [dm_mod]
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014783]
[<ffffffff808b18e0>] process_one_work+0x190/0x480
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014791]
[<ffffffff808b1d18>] worker_thread+0x148/0x580
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014801]
[<ffffffff808b813c>] kthread+0xdc/0xf8
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014811]
[<ffffffff8086bf28>] ret_from_kernel_thread+0x14/0x1c
Sep 24 12:08:48.974658 warn CFPU-1 kernel: [  280.014817]
Sep 24 12:08:48.974658 err CFPU-1 kernel: [  280.015046] INFO: task
drbd_r_r1:7772 blocked for more than 120 seconds.
Sep 24 12:08:48.974658 err CFPU-1 kernel: [  280.021766]
Tainted: P           O    4.4.184-octeon-distro.git-v2.96-4-rc-wnd #1
Sep 24 12:08:48.974658 err CFPU-1 kernel: [  280.029781] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 24 12:08:48.982578 info CFPU-1 kernel: [  280.037637] drbd_r_r1
   D ffffffff80e1db78     0  7772      2 0x00100002
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037648] Stack :
00000000000207e8 ffffffff80b35530 8000000788e77860 8000000788e77860
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037648]
7fffffffffffffff 80000007f8d1cb28 8000000788e0a880 0000000000000002
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037648]
ffffffff80e20000 80000007f9306480 00000000000207e8 ffffffff808dfe58
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037648]
80000007eebf5168 ffffffff80e1db78 0000000002411200 ffffffff80e208d8
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037648]
80000007eab5b440 ffffffff8097b25c 00000000000207a0 ffffffff808dfe58
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037648]
80000007f8d1ca00 ffffffff809ce014 80000007f9306000 0000000002011200
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037648]
7fffffffffffffff 80000007f8d1cb28 8000000788e0a880 0000000000000002
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037648]
ffffffff80e20000 ffffffff80e1f8d8 80000007f8d1cb30 80000007f8d1cb30
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037648]
8000000788e0a880 00ffffff808db9e8 0000000000000000 80000007f8d1cb28
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037648]
80000007f9306480 ffffffffc02834d0 ffffffff808e0000 ffffffff808dfba4
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037648]   ...
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037774] Call Trace:
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037797]
[<ffffffff80e1d4a8>] __schedule+0x3c0/0xa58
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037849]
[<ffffffff80e1db78>] schedule+0x38/0x98
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037865]
[<ffffffff80e208d8>] schedule_timeout+0x240/0x2a0
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037874]
[<ffffffff80e1f8d8>] __down+0x90/0xd8
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037884]
[<ffffffff808dfba4>] down+0x54/0x70
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037901]
[<ffffffffc027da48>] start_copy+0x98/0xd8 [dm_snapshot]
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037934]
[<ffffffffc027e7d4>] __origin_write+0x184/0x2c0 [dm_snapshot]
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.037968]
[<ffffffffc027ee4c>] do_origin.isra.13+0xa4/0x110 [dm_snapshot]
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.038016]
[<ffffffffc01dc2c0>] __map_bio+0xb0/0x258 [dm_mod]
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.038071]
[<ffffffffc01deb94>] __split_and_process_bio+0x274/0x488 [dm_mod]
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.038126]
[<ffffffffc01dee3c>] dm_make_request+0x94/0x128 [dm_mod]
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.038174]
[<ffffffff80b3347c>] generic_make_request+0x114/0x290
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.038238]
[<ffffffffc0511090>] drbd_submit_peer_request+0x258/0x618 [drbd]
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.038337]
[<ffffffffc05121f8>] receive_RSDataReply+0x3b8/0x770 [drbd]
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.038426]
[<ffffffffc0515b30>] drbd_receiver+0x210/0x420 [drbd]
Sep 24 12:08:48.983234 warn CFPU-1 kernel: [  280.038526]
[<ffffffffc0523a3c>] drbd_thread_setup+0x74/0x1a8 [drbd]
Sep 24 12:08:48.985184 warn CFPU-1 kernel: [  280.038588]
[<ffffffff808b813c>] kthread+0xdc/0xf8
Sep 24 12:08:48.985184 warn CFPU-1 kernel: [  280.038604]
[<ffffffff8086bf28>] ret_from_kernel_thread+0x14/0x1c
Sep 24 12:08:48.985184 warn CFPU-1 kernel: [  280.038612]
Sep 24 12:08:48.985184 err CFPU-1 kernel: [  280.038629] INFO: task
drbd_r_r5:7910 blocked for more than 120 seconds.
Sep 24 12:08:48.990218 err CFPU-1 kernel: [  280.045351]
Tainted: P           O    4.4.184-octeon-distro.git-v2.96-4-rc-wnd #1
Sep 24 12:08:48.998215 err CFPU-1 kernel: [  280.053372] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 24 12:08:49.006141 info CFPU-1 kernel: [  280.061248] drbd_r_r5
   D ffffffff80e1db78     0  7910      2 0x00100002
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061257] Stack :
0000000000000001 ffffffff80b35530 8000000788ef7950 8000000788ef7950
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061257]
8000000787936c00 0000000000000002 ffffffffc0285294 00000000000049ba
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061257]
0000000000000001 00000000000049ba 0000000000000001 ffffffff80b2aa90
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061257]
0000000000000001 ffffffff80e1db78 8000000787936c00 ffffffff80e204b8
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061257]
800000078785b9c0 80000007fde8bb30 8000000787936c00 0000000100000000
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061257]
ffffffffc0280000 80000007eff43920 8000000788ca0198 ffffffffc027edec
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061257]
80000007eff43900 c000000001f5b080 80000007eff43920 ffffffffc01dc2c0
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061257]
80000007eb29bd80 0000000000000000 0000000002400000 80000007eff42900
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061257]
00000000000049ba ffffffff80b2abec 8000000788ef7a50 8000000788ef7a50
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061257]
ffffffffc01dbad8 c000000001f5b080 c000000001f5b080 80000007eff43900
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061257]   ...
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061375] Call Trace:
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061392]
[<ffffffff80e1d4a8>] __schedule+0x3c0/0xa58
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061435]
[<ffffffff80e1db78>] schedule+0x38/0x98
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061445]
[<ffffffff80e204b8>] __down_read+0xa8/0xf0
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061463]
[<ffffffffc027edec>] do_origin.isra.13+0x44/0x110 [dm_snapshot]
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061509]
[<ffffffffc01dc2c0>] __map_bio+0xb0/0x258 [dm_mod]
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061563]
[<ffffffffc01deb94>] __split_and_process_bio+0x274/0x488 [dm_mod]
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061598]
[<ffffffffc01dee3c>] dm_make_request+0x94/0x128 [dm_mod]
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061624]
[<ffffffff80b3347c>] generic_make_request+0x114/0x290
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061674]
[<ffffffffc0511090>] drbd_submit_peer_request+0x258/0x618 [drbd]
Sep 24 12:08:49.006513 warn CFPU-1 kernel: [  280.061739]
[<ffffffffc0512c78>] receive_Data+0x6c8/0x1368 [drbd]
Sep 24 12:08:49.007987 warn CFPU-1 kernel: [  280.061816]
[<ffffffffc0515b30>] drbd_receiver+0x210/0x420 [drbd]
Sep 24 12:08:49.007987 warn CFPU-1 kernel: [  280.061882]
[<ffffffffc0523a3c>] drbd_thread_setup+0x74/0x1a8 [drbd]
Sep 24 12:08:49.007987 warn CFPU-1 kernel: [  280.061922]
[<ffffffff808b813c>] kthread+0xdc/0xf8
Sep 24 12:08:49.007987 warn CFPU-1 kernel: [  280.061931]
[<ffffffff8086bf28>] ret_from_kernel_thread+0x14/0x1c
Sep 24 12:08:49.007987 warn CFPU-1 kernel: [  280.061937]
Sep 24 12:08:49.007987 err CFPU-1 kernel: [  280.061948] INFO: task
drbd_r_r6:7991 blocked for more than 120 seconds.
Sep 24 12:08:49.013584 err CFPU-1 kernel: [  280.068669]
Tainted: P           O    4.4.184-octeon-distro.git-v2.96-4-rc-wnd #1
Sep 24 12:08:49.021541 err CFPU-1 kernel: [  280.076683] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 24 12:08:49.029370 info CFPU-1 kernel: [  280.084523] drbd_r_r6
   D ffffffff80e1db78     0  7991      2 0x00100002
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084532] Stack :
0000000000000001 ffffffff80b35530 800000078785b950 800000078785b950
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084532]
8000000787b79b00 0000000000000002 ffffffffc0285294 000000000000049a
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084532]
0000000000000001 000000000000049a 0000000000000001 ffffffff80b2aa90
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084532]
0000000000000001 ffffffff80e1db78 8000000787b79b00 ffffffff80e204b8
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084532]
800000078465b940 8000000788ef79c0 8000000787b79b00 0000000100000000
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084532]
ffffffffc0280000 80000007e90d6c20 80000007878cf2d8 ffffffffc027edec
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084532]
80000007e90d6c00 c000000001fcc080 80000007e90d6c20 ffffffffc01dc2c0
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084532]
80000007f93fd900 0000000000000000 0000000002400000 80000007e90d6a00
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084532]
000000000000049a ffffffff80b2abec 800000078785ba50 800000078785ba50
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084532]
ffffffffc01dbad8 c000000001fcc080 c000000001fcc080 80000007e90d6c00
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084532]   ...
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084610] Call Trace:
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084621]
[<ffffffff80e1d4a8>] __schedule+0x3c0/0xa58
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084631]
[<ffffffff80e1db78>] schedule+0x38/0x98
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084641]
[<ffffffff80e204b8>] __down_read+0xa8/0xf0
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084659]
[<ffffffffc027edec>] do_origin.isra.13+0x44/0x110 [dm_snapshot]
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084696]
[<ffffffffc01dc2c0>] __map_bio+0xb0/0x258 [dm_mod]
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084729]
[<ffffffffc01deb94>] __split_and_process_bio+0x274/0x488 [dm_mod]
Sep 24 12:08:49.029567 warn CFPU-1 kernel: [  280.084777]
[<ffffffffc01dee3c>] dm_make_request+0x94/0x128 [dm_mod]
Sep 24 12:08:49.031000 warn CFPU-1 kernel: [  280.084810]
[<ffffffff80b3347c>] generic_make_request+0x114/0x290
Sep 24 12:08:49.031000 warn CFPU-1 kernel: [  280.084863]
[<ffffffffc0511090>] drbd_submit_peer_request+0x258/0x618 [drbd]
Sep 24 12:08:49.031000 warn CFPU-1 kernel: [  280.084928]
[<ffffffffc0512c78>] receive_Data+0x6c8/0x1368 [drbd]
Sep 24 12:08:49.031000 warn CFPU-1 kernel: [  280.084992]
[<ffffffffc0515b30>] drbd_receiver+0x210/0x420 [drbd]
Sep 24 12:08:49.031000 warn CFPU-1 kernel: [  280.085057]
[<ffffffffc0523a3c>] drbd_thread_setup+0x74/0x1a8 [drbd]
Sep 24 12:08:49.031000 warn CFPU-1 kernel: [  280.085097]
[<ffffffff808b813c>] kthread+0xdc/0xf8
Sep 24 12:08:49.031000 warn CFPU-1 kernel: [  280.085106]
[<ffffffff8086bf28>] ret_from_kernel_thread+0x14/0x1c
Sep 24 12:08:49.031000 warn CFPU-1 kernel: [  280.085112]
Sep 24 12:08:49.031000 err CFPU-1 kernel: [  280.085121] INFO: task
drbd_r_r7:8046 blocked for more than 120 seconds.
Sep 24 12:08:49.036834 err CFPU-1 kernel: [  280.091854]
Tainted: P           O    4.4.184-octeon-distro.git-v2.96-4-rc-wnd #1
Sep 24 12:08:49.044747 err CFPU-1 kernel: [  280.099876] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 24 12:08:49.056612 info CFPU-1 kernel: [  280.107739] drbd_r_r7
   D ffffffff80e1db78     0  8046      2 0x00100000
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107749] Stack :
0000000000000000 0000000000000010 ffffffff811b3a80 0000000000000000
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107749]
7fffffffffffffff 7fffffffffffffff 0000000000000000 0000000000000002
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107749]
8000000788fcfa98 0000000000000000 ffffffffc053baa8 ffffffff80be4360
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107749]
ffffffffc0550000 ffffffff80e1db78 ffffffff81070660 ffffffff80e208d8
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107749]
8000000797a43600 ffffffff808c4878 80000007ff2f4100 0000000000000000
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107749]
80000007f93fdb40 0000000000000000 80000007ff007000 ffffffff81070660
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107749]
8000000788fcfa90 7fffffffffffffff 0000000000000000 0000000000000002
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107749]
8000000788fcfa98 ffffffff80e1e8a0 0000000100000000 8000000797a42880
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107749]
ffffffff808c4b60 8000000788fcfaa0 8000000788fcfaa0 ffffffffc053baa8
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107749]
ffffffff80be4360 ffffffff81cb4540 ffffffff81cb0000 80000007f93fdb40
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107749]   ...
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107821] Call Trace:
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107833]
[<ffffffff80e1d4a8>] __schedule+0x3c0/0xa58
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107842]
[<ffffffff80e1db78>] schedule+0x38/0x98
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107850]
[<ffffffff80e208d8>] schedule_timeout+0x240/0x2a0
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107859]
[<ffffffff80e1e8a0>] wait_for_common+0xd8/0x1b0
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107873]
[<ffffffff808acc20>] call_usermodehelper_exec+0x110/0x188
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107932]
[<ffffffffc053da3c>] drbd_khelper+0x1c4/0x310 [drbd]
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.107998]
[<ffffffffc0500a14>] drbd_start_resync+0x534/0x968 [drbd]
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.108060]
[<ffffffffc05037dc>] receive_sync_uuid+0x2d4/0x5a0 [drbd]
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.108124]
[<ffffffffc0515b30>] drbd_receiver+0x210/0x420 [drbd]
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.108189]
[<ffffffffc0523a3c>] drbd_thread_setup+0x74/0x1a8 [drbd]
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.108229]
[<ffffffff808b813c>] kthread+0xdc/0xf8
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.108239]
[<ffffffff8086bf28>] ret_from_kernel_thread+0x14/0x1c
Sep 24 12:08:49.056612 warn CFPU-1 kernel: [  280.108245]
Sep 24 12:08:49.056612 err CFPU-1 kernel: [  280.108471] INFO: task
drbd_r_r8:8120 blocked for more than 120 seconds.
Sep 24 12:08:49.060085 err CFPU-1 kernel: [  280.115194]
Tainted: P           O    4.4.184-octeon-distro.git-v2.96-4-rc-wnd #1
Sep 24 12:08:49.075924 err CFPU-1 kernel: [  280.123218] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 24 12:08:49.075924 info CFPU-1 kernel: [  280.131070] drbd_r_r8
   D ffffffff80e1db78     0  8120      2 0x00100002
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131083] Stack :
0000000000000000 0000000000000010 ffffffff811b3a80 0000000000000000
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131083]
7fffffffffffffff 7fffffffffffffff 0000000000000000 0000000000000002
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131083]
80000007851d3a98 0000000000000000 ffffffffc053baa8 ffffffff80be4360
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131083]
ffffffffc0550000 ffffffff80e1db78 ffffffff81070660 ffffffff80e208d8
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131083]
80000007f96f6c00 ffffffff808c4878 80000007ff2f4100 0000000000000000
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131083]
80000007ee99f360 0000000000000000 80000007ff007000 ffffffff81070660
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131083]
80000007851d3a90 7fffffffffffffff 0000000000000000 0000000000000002
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131083]
80000007851d3a98 ffffffff80e1e8a0 0000000100000000 8000000784ba3600
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131083]
ffffffff808c4b60 80000007851d3aa0 80000007851d3aa0 ffffffffc053baa8
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131083]
ffffffff80be4360 ffffffff81cb4540 ffffffff81cb0000 80000007ee99f360
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131083]   ...
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131162] Call Trace:
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131174]
[<ffffffff80e1d4a8>] __schedule+0x3c0/0xa58
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131183]
[<ffffffff80e1db78>] schedule+0x38/0x98
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131195]
[<ffffffff80e208d8>] schedule_timeout+0x240/0x2a0
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131204]
[<ffffffff80e1e8a0>] wait_for_common+0xd8/0x1b0
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131216]
[<ffffffff808acc20>] call_usermodehelper_exec+0x110/0x188
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131274]
[<ffffffffc053da3c>] drbd_khelper+0x1c4/0x310 [drbd]
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131341]
[<ffffffffc0500a14>] drbd_start_resync+0x534/0x968 [drbd]
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131403]
[<ffffffffc05037dc>] receive_sync_uuid+0x2d4/0x5a0 [drbd]
Sep 24 12:08:49.076256 warn CFPU-1 kernel: [  280.131482]
[<ffffffffc0515b30>] drbd_receiver+0x210/0x420 [drbd]
Sep 24 12:08:49.077857 warn CFPU-1 kernel: [  280.131557]
[<ffffffffc0523a3c>] drbd_thread_setup+0x74/0x1a8 [drbd]
Sep 24 12:08:49.077857 warn CFPU-1 kernel: [  280.131597]
[<ffffffff808b813c>] kthread+0xdc/0xf8
Sep 24 12:08:49.077857 warn CFPU-1 kernel: [  280.131606]
[<ffffffff8086bf28>] ret_from_kernel_thread+0x14/0x1c
Sep 24 12:08:49.077857 warn CFPU-1 kernel: [  280.131612]
Sep 24 12:08:49.077857 err CFPU-1 kernel: [  280.131641] INFO: task
drbd_r_r9:8173 blocked for more than 120 seconds.
Sep 24 12:08:49.091245 err CFPU-1 kernel: [  280.138358]
Tainted: P           O    4.4.184-octeon-distro.git-v2.96-4-rc-wnd #1
Sep 24 12:08:49.091245 err CFPU-1 kernel: [  280.146373] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 24 12:08:49.099067 info CFPU-1 kernel: [  280.154219] drbd_r_r9
   D ffffffff80e1db78     0  8173      2 0x00100002
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154229] Stack :
0000000000000000 0000000000000010 ffffffff811b3a80 0000000000000000
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154229]
7fffffffffffffff 7fffffffffffffff 0000000000000000 0000000000000002
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154229]
8000000783c9fa98 0000000000000000 ffffffffc053baa8 ffffffff80be4360
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154229]
ffffffffc0550000 ffffffff80e1db78 ffffffff81070660 ffffffff80e208d8
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154229]
8000000797a45100 ffffffff808c4878 80000007ff2f4100 0000000000000000
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154229]
8000000788ca9d20 0000000000000000 80000007ff007000 ffffffff81070660
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154229]
8000000783c9fa90 7fffffffffffffff 0000000000000000 0000000000000002
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154229]
8000000783c9fa98 ffffffff80e1e8a0 0000000100000000 80000007843d4380
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154229]
ffffffff808c4b60 8000000783c9faa0 8000000783c9faa0 ffffffffc053baa8
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154229]
ffffffff80be4360 ffffffff81cb4540 ffffffff81cb0000 8000000788ca9d20
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154229]   ...
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154305] Call Trace:
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154315]
[<ffffffff80e1d4a8>] __schedule+0x3c0/0xa58
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154325]
[<ffffffff80e1db78>] schedule+0x38/0x98
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154333]
[<ffffffff80e208d8>] schedule_timeout+0x240/0x2a0
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154342]
[<ffffffff80e1e8a0>] wait_for_common+0xd8/0x1b0
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154354]
[<ffffffff808acc20>] call_usermodehelper_exec+0x110/0x188
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154410]
[<ffffffffc053da3c>] drbd_khelper+0x1c4/0x310 [drbd]
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154475]
[<ffffffffc0500a14>] drbd_start_resync+0x534/0x968 [drbd]
Sep 24 12:08:49.099314 warn CFPU-1 kernel: [  280.154540]
[<ffffffffc05037dc>] receive_sync_uuid+0x2d4/0x5a0 [drbd]
Sep 24 12:08:49.100714 warn CFPU-1 kernel: [  280.154612]
[<ffffffffc0515b30>] drbd_receiver+0x210/0x420 [drbd]
Sep 24 12:08:49.100714 warn CFPU-1 kernel: [  280.154678]
[<ffffffffc0523a3c>] drbd_thread_setup+0x74/0x1a8 [drbd]
Sep 24 12:08:49.100714 warn CFPU-1 kernel: [  280.154717]
[<ffffffff808b813c>] kthread+0xdc/0xf8
Sep 24 12:08:49.100714 warn CFPU-1 kernel: [  280.154726]
[<ffffffff8086bf28>] ret_from_kernel_thread+0x14/0x1c
Sep 24 12:08:49.100714 warn CFPU-1 kernel: [  280.154732]
Sep 24 12:08:49.100714 err CFPU-1 kernel: [  280.154742] INFO: task
drbd_r_r10:8254 blocked for more than 120 seconds.
Sep 24 12:08:49.106539 err CFPU-1 kernel: [  280.161554]
Tainted: P           O    4.4.184-octeon-distro.git-v2.96-4-rc-wnd #1
Sep 24 12:08:49.114430 err CFPU-1 kernel: [  280.169569] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 24 12:08:49.129749 info CFPU-1 kernel: [  280.177434] drbd_r_r10
   D ffffffff80e1db78     0  8254      2 0x00100002
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177445] Stack :
0000000000000000 0000000000000010 ffffffff811b3a80 0000000000000000
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177445]
7fffffffffffffff 7fffffffffffffff 0000000000000000 0000000000000002
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177445]
80000007846efa98 0000000000000000 ffffffffc053baa8 ffffffff80be4360
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177445]
ffffffffc0550000 ffffffff80e1db78 ffffffff81070660 ffffffff80e208d8
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177445]
8000000784893600 ffffffff808c4878 80000007ff2f4100 0000000000000000
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177445]
80000007e9498180 0000000000000000 80000007ff007000 ffffffff81070660
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177445]
80000007846efa90 7fffffffffffffff 0000000000000000 0000000000000002
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177445]
80000007846efa98 ffffffff80e1e8a0 0000000100000000 8000000783cf8d80
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177445]
ffffffff808c4b60 80000007846efaa0 80000007846efaa0 ffffffffc053baa8
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177445]
ffffffff80be4360 ffffffff81cb4540 ffffffff81cb0000 80000007e9498180
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177445]   ...
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177517] Call Trace:
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177529]
[<ffffffff80e1d4a8>] __schedule+0x3c0/0xa58
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177539]
[<ffffffff80e1db78>] schedule+0x38/0x98
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177547]
[<ffffffff80e208d8>] schedule_timeout+0x240/0x2a0
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177556]
[<ffffffff80e1e8a0>] wait_for_common+0xd8/0x1b0
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177569]
[<ffffffff808acc20>] call_usermodehelper_exec+0x110/0x188
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177631]
[<ffffffffc053da3c>] drbd_khelper+0x1c4/0x310 [drbd]
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177697]
[<ffffffffc0500a14>] drbd_start_resync+0x534/0x968 [drbd]
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177760]
[<ffffffffc05037dc>] receive_sync_uuid+0x2d4/0x5a0 [drbd]
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177823]
[<ffffffffc0515b30>] drbd_receiver+0x210/0x420 [drbd]
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177888]
[<ffffffffc0523a3c>] drbd_thread_setup+0x74/0x1a8 [drbd]
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177928]
[<ffffffff808b813c>] kthread+0xdc/0xf8
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177938]
[<ffffffff8086bf28>] ret_from_kernel_thread+0x14/0x1c
Sep 24 12:08:49.129749 warn CFPU-1 kernel: [  280.177944]
Sep 24 12:08:49.129749 err CFPU-1 kernel: [  280.177960] INFO: task
drbd_r_r11:8328 blocked for more than 120 seconds.
Sep 24 12:08:49.129749 err CFPU-1 kernel: [  280.184775]
Tainted: P           O    4.4.184-octeon-distro.git-v2.96-4-rc-wnd #1
Sep 24 12:08:49.137674 err CFPU-1 kernel: [  280.192793] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 24 12:08:49.152797 info CFPU-1 kernel: [  280.200644] drbd_r_r11
   D ffffffff80e1db78     0  8328      2 0x00100002
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200654] Stack :
0000000000000000 0000000000000010 ffffffff811b3a80 0000000000000000
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200654]
7fffffffffffffff 7fffffffffffffff 0000000000000000 0000000000000002
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200654]
8000000783c5fa98 0000000000000000 ffffffffc053baa8 ffffffff80be4360
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200654]
ffffffffc0550000 ffffffff80e1db78 ffffffff81070660 ffffffff80e208d8
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200654]
8000000787935100 ffffffff808c4878 80000007ff2f4100 0000000000000000
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200654]
80000007eebd25a0 0000000000000000 80000007ff007000 ffffffff81070660
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200654]
8000000783c5fa90 7fffffffffffffff 0000000000000000 0000000000000002
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200654]
8000000783c5fa98 ffffffff80e1e8a0 0000000100000000 800000078371de80
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200654]
ffffffff808c4b60 8000000783c5faa0 8000000783c5faa0 ffffffffc053baa8
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200654]
ffffffff80be4360 ffffffff81cb4540 ffffffff81cb0000 80000007eebd25a0
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200654]   ...
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200726] Call Trace:
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200739]
[<ffffffff80e1d4a8>] __schedule+0x3c0/0xa58
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200749]
[<ffffffff80e1db78>] schedule+0x38/0x98
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200757]
[<ffffffff80e208d8>] schedule_timeout+0x240/0x2a0
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200766]
[<ffffffff80e1e8a0>] wait_for_common+0xd8/0x1b0
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200778]
[<ffffffff808acc20>] call_usermodehelper_exec+0x110/0x188
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200840]
[<ffffffffc053da3c>] drbd_khelper+0x1c4/0x310 [drbd]
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200906]
[<ffffffffc0500a14>] drbd_start_resync+0x534/0x968 [drbd]
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.200969]
[<ffffffffc05037dc>] receive_sync_uuid+0x2d4/0x5a0 [drbd]
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.201032]
[<ffffffffc0515b30>] drbd_receiver+0x210/0x420 [drbd]
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.201097]
[<ffffffffc0523a3c>] drbd_thread_setup+0x74/0x1a8 [drbd]
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.201137]
[<ffffffff808b813c>] kthread+0xdc/0xf8
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.201147]
[<ffffffff8086bf28>] ret_from_kernel_thread+0x14/0x1c
Sep 24 12:08:49.152797 warn CFPU-1 kernel: [  280.201153]
Sep 24 12:08:49.152797 err CFPU-1 kernel: [  280.201183] INFO: task
lvcreate:8585 blocked for more than 120 seconds.
Sep 24 12:08:49.152797 err CFPU-1 kernel: [  280.207823]
Tainted: P           O    4.4.184-octeon-distro.git-v2.96-4-rc-wnd #1
Sep 24 12:08:49.160715 err CFPU-1 kernel: [  280.215860] "echo 0 >
/proc/sys/kernel/hung_task_timeout_secs" disables this message.
Sep 24 12:08:49.168570 info CFPU-1 kernel: [  280.223704] lvcreate
   D ffffffff80e1db78     0  8585   8582 0x00100000
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223719] Stack :
ffffffff809ce420 ffffffffc027e170 80000007ea05c720 ffffffff809ce014
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223719]
ffffffffc0285294 ffffffffc0285290 8000000797bdb600 0000000000000002
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223719]
ffffffffc02834d0 ffffffffc0280000 ffffffff809ce420 ffffffffc027e170
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223719]
80000007f9275d80 ffffffff80e1db78 ffffffffc0285294 ffffffff80e20584
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223719]
80000007fde8bb30 ffffffffc0285298 8000000797bdb600 0000000000000000
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223719]
c00000000205a080 0000000000000000 c00000000205a080 80000007ea05c600
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223719]
80000007fec10300 ffffffffc027fd20 8000000780cb0150 ffffffffc01e2e9c
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223719]
00000008c0284b30 00000002c0284b30 80000007ea05c620 ffffffffc0280000
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223719]
c00000000205a080 80000007ea05de00 0000000000000000 8000000780cb0150
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223719]
8000000780cb0160 0000000001d4c000 0000000000000000 8000000780cb0000
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223719]   ...
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223796] Call Trace:
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223805]
[<ffffffff80e1d4a8>] __schedule+0x3c0/0xa58
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223814]
[<ffffffff80e1db78>] schedule+0x38/0x98
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223824]
[<ffffffff80e20584>] __down_write_nested+0x84/0xe8
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223843]
[<ffffffffc027fd20>] snapshot_ctr+0x4d0/0x868 [dm_snapshot]
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223886]
[<ffffffffc01e31d4>] dm_table_add_target+0x164/0x418 [dm_mod]
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223921]
[<ffffffffc01e7bdc>] table_load+0x194/0x478 [dm_mod]
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.223956]
[<ffffffffc01e8e1c>] ctl_ioctl+0x424/0x678 [dm_mod]
Sep 24 12:08:49.168796 warn CFPU-1 kernel: [  280.224006]
[<ffffffffc01e90a0>] dm_ctl_ioctl+0x30/0x40 [dm_mod]
Sep 24 12:08:49.170177 warn CFPU-1 kernel: [  280.224040]
[<ffffffff809f29cc>] do_vfs_ioctl+0x38c/0x5f8
Sep 24 12:08:49.170177 warn CFPU-1 kernel: [  280.224049]
[<ffffffff809f2c98>] SyS_ioctl+0x60/0xc8
Sep 24 12:08:49.170177 warn CFPU-1 kernel: [  280.224059]
[<ffffffff80879b70>] syscall_common+0x34/0x58
Sep 24 12:08:49.170177 warn CFPU-1 kernel: [  280.224065]

-- 
Guruswamy Basavaiah


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