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Constant "SPL: Showing stack for process" while scrubbing #292

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tuomari opened this issue Sep 16, 2013 · 2 comments
Closed

Constant "SPL: Showing stack for process" while scrubbing #292

tuomari opened this issue Sep 16, 2013 · 2 comments
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Bug
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0.6.3

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@tuomari
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tuomari commented Sep 16, 2013

dmesg shows this every 8 seconds or so while scrubbing. This stops when scrubbing is stopped.
The system seems stable and there seem to be no other side-effects than flooding of dmesg

Kernel: 3.10.12
ZFS and SPL latest from git compiled in to kernel

Sep 15 21:25:20 genetti kernel: [ 1.889473] SPL: Loaded module v0.6.2-1
Sep 15 21:25:20 genetti kernel: [ 1.889993] SPLAT: Loaded module v0.6.2-1
Sep 15 21:25:20 genetti kernel: [ 1.965584] ZFS: Loaded module v0.6.2-6_g34d5a5f, ZFS pool version 5000, ZFS filesystem version 5

Sep 16 02:58:08 genetti kernel: [19989.954175] SPL: Fixing allocation for task txg_sync (1470) which used GFP flags 0xffb21b04 with PF_NOFS set
Sep 16 02:58:08 genetti kernel: [19989.954237] SPL: Skipped 45 previous similar messages
Sep 16 02:58:08 genetti kernel: [19989.954265] SPL: Showing stack for process 1470
Sep 16 02:58:08 genetti kernel: [19989.954295] CPU: 7 PID: 1470 Comm: txg_sync Not tainted 3.10.12-kvm-ovs-zfs-iudex #1
Sep 16 02:58:08 genetti kernel: [19989.954343] Hardware name: Supermicro X9DR3-F/X9DR3-F, BIOS 2.0a 03/27/2013
Sep 16 02:58:08 genetti kernel: [19989.954375] ffff881fff851e20 ffff881fffb21a48 ffffffff816bb17c ffff881fffb21a58
Sep 16 02:58:08 genetti kernel: [19989.954436] ffffffff81173072 ffff881fffb21a98 ffffffff816ba32c ffffffff81a4b798
Sep 16 02:58:08 genetti kernel: [19989.954506] ffff881fff852150 00000000000005be ffff881fffb21b04 0000000000000018
Sep 16 02:58:08 genetti kernel: [19989.954581] Call Trace:
Sep 16 02:58:08 genetti kernel: [19989.954613] [] dump_stack+0x19/0x1b
Sep 16 02:58:08 genetti kernel: [19989.954646] [] spl_debug_dumpstack+0x22/0x40
Sep 16 02:58:08 genetti kernel: [19989.954678] [] sanitize_flags.part.10+0x68/0x77
Sep 16 02:58:08 genetti kernel: [19989.954710] [] kmem_alloc_debug+0x387/0x3b0
Sep 16 02:58:08 genetti kernel: [19989.954743] [] ? mutex_lock_nested+0x27e/0x360
Sep 16 02:58:08 genetti kernel: [19989.954777] [] ? rrw_enter_read+0x58/0x1b0
Sep 16 02:58:08 genetti kernel: [19989.954807] [] rrw_enter_read+0x111/0x1b0
Sep 16 02:58:08 genetti kernel: [19989.954838] [] rrw_enter+0x18/0x20
Sep 16 02:58:08 genetti kernel: [19989.954870] [] dsl_pool_config_enter+0x18/0x20
Sep 16 02:58:08 genetti kernel: [19989.954901] [] dsl_scan_sync+0x10d/0xb30
Sep 16 02:58:08 genetti kernel: [19989.954934] [] ? trace_hardirqs_on+0xd/0x10
Sep 16 02:58:08 genetti kernel: [19989.954965] [] spa_sync+0x4ad/0xb60
Sep 16 02:58:08 genetti kernel: [19989.954996] [] ? ktime_get_ts+0x47/0xe0
Sep 16 02:58:08 genetti kernel: [19989.955029] [] txg_sync_thread+0x32e/0x600
Sep 16 02:58:08 genetti kernel: [19989.955060] [] ? kmem_free_debug+0x46/0x140
Sep 16 02:58:08 genetti kernel: [19989.955092] [] ? txg_quiesce_thread+0x4e0/0x4e0
Sep 16 02:58:08 genetti kernel: [19989.955124] [] thread_generic_wrapper+0x73/0x90
Sep 16 02:58:08 genetti kernel: [19989.955155] [] ? __thread_create+0x340/0x340
Sep 16 02:58:08 genetti kernel: [19989.955188] [] kthread+0xe5/0xf0
Sep 16 02:58:08 genetti kernel: [19989.955219] [] ? finish_task_switch+0x3a/0x110
Sep 16 02:58:08 genetti kernel: [19989.955251] [] ? kthread_create_on_node+0x160/0x160
Sep 16 02:58:08 genetti kernel: [19989.955286] [] ret_from_fork+0x7c/0xb0
Sep 16 02:58:08 genetti kernel: [19989.955315] [] ? kthread_create_on_node+0x160/0x160
Sep 16 02:58:10 genetti kernel: [19991.904784] SPL: Showing stack for process 1470
Sep 16 02:58:10 genetti kernel: [19991.904822] CPU: 21 PID: 1470 Comm: txg_sync Not tainted 3.10.12-kvm-ovs-zfs-iudex #1
Sep 16 02:58:10 genetti kernel: [19991.904869] Hardware name: Supermicro X9DR3-F/X9DR3-F, BIOS 2.0a 03/27/2013
Sep 16 02:58:10 genetti kernel: [19991.904902] ffff881fff851e20 ffff881fffb21a48 ffffffff816bb17c ffff881fffb21a58
Sep 16 02:58:10 genetti kernel: [19991.904961] ffffffff81173072 ffff881fffb21a98 ffffffff816ba32c ffffffff81a4b798
Sep 16 02:58:10 genetti kernel: [19991.905018] ffff881fff852150 00000000000005be ffff881fffb21b04 0000000000000018
Sep 16 02:58:10 genetti kernel: [19991.905076] Call Trace:
Sep 16 02:58:10 genetti kernel: [19991.905109] [] dump_stack+0x19/0x1b
Sep 16 02:58:10 genetti kernel: [19991.905142] [] spl_debug_dumpstack+0x22/0x40
Sep 16 02:58:10 genetti kernel: [19991.905174] [] sanitize_flags.part.10+0x68/0x77
Sep 16 02:58:10 genetti kernel: [19991.905206] [] kmem_alloc_debug+0x387/0x3b0
Sep 16 02:58:10 genetti kernel: [19991.905240] [] ? mutex_lock_nested+0x27e/0x360
Sep 16 02:58:10 genetti kernel: [19991.905274] [] ? rrw_enter_read+0x58/0x1b0
Sep 16 02:58:10 genetti kernel: [19991.905305] [] rrw_enter_read+0x111/0x1b0
Sep 16 02:58:10 genetti kernel: [19991.905335] [] rrw_enter+0x18/0x20
Sep 16 02:58:10 genetti kernel: [19991.905368] [] dsl_pool_config_enter+0x18/0x20
Sep 16 02:58:10 genetti kernel: [19991.905399] [] dsl_scan_sync+0x10d/0xb30
Sep 16 02:58:10 genetti kernel: [19991.905432] [] ? trace_hardirqs_on+0xd/0x10
Sep 16 02:58:10 genetti kernel: [19991.905464] [] spa_sync+0x4ad/0xb60
Sep 16 02:58:10 genetti kernel: [19991.905495] [] ? _raw_spin_unlock_irqrestore+0x57/0x70
Sep 16 02:58:10 genetti kernel: [19991.905532] [] ? try_to_wake_up+0x1cd/0x2f0
Sep 16 02:58:10 genetti kernel: [19991.905564] [] ? ktime_get_ts+0x47/0xe0
Sep 16 02:58:10 genetti kernel: [19991.905596] [] txg_sync_thread+0x32e/0x600
Sep 16 02:58:10 genetti kernel: [19991.905627] [] ? kmem_free_debug+0x46/0x140
Sep 16 02:58:10 genetti kernel: [19991.905659] [] ? txg_quiesce_thread+0x4e0/0x4e0
Sep 16 02:58:10 genetti kernel: [19991.905690] [] thread_generic_wrapper+0x73/0x90
Sep 16 02:58:10 genetti kernel: [19991.905722] [] ? __thread_create+0x340/0x340
Sep 16 02:58:10 genetti kernel: [19991.905754] [] kthread+0xe5/0xf0
Sep 16 02:58:10 genetti kernel: [19991.905783] [] ? finish_task_switch+0x3a/0x110
Sep 16 02:58:10 genetti kernel: [19991.905815] [] ? kthread_create_on_node+0x160/0x160
Sep 16 02:58:10 genetti kernel: [19991.905849] [] ret_from_fork+0x7c/0xb0
Sep 16 02:58:10 genetti kernel: [19991.905878] [] ? kthread_create_on_node+0x160/0x160
Sep 16 02:58:17 genetti kernel: [19998.721263] SPL: Showing stack for process 1470
Sep 16 02:58:17 genetti kernel: [19998.721301] CPU: 23 PID: 1470 Comm: txg_sync Not tainted 3.10.12-kvm-ovs-zfs-iudex #1
Sep 16 02:58:17 genetti kernel: [19998.721348] Hardware name: Supermicro X9DR3-F/X9DR3-F, BIOS 2.0a 03/27/2013
Sep 16 02:58:17 genetti kernel: [19998.721380] ffff881fff851e20 ffff881fffb21a48 ffffffff816bb17c ffff881fffb21a58
Sep 16 02:58:17 genetti kernel: [19998.721439] ffffffff81173072 ffff881fffb21a98 ffffffff816ba32c ffffffff81a4b798
Sep 16 02:58:17 genetti kernel: [19998.721496] ffff881fff852150 00000000000005be ffff881fffb21b04 0000000000000018
Sep 16 02:58:17 genetti kernel: [19998.721553] Call Trace:
Sep 16 02:58:17 genetti kernel: [19998.721586] [] dump_stack+0x19/0x1b
Sep 16 02:58:17 genetti kernel: [19998.721619] [] spl_debug_dumpstack+0x22/0x40
Sep 16 02:58:17 genetti kernel: [19998.721651] [] sanitize_flags.part.10+0x68/0x77
Sep 16 02:58:17 genetti kernel: [19998.721683] [] kmem_alloc_debug+0x387/0x3b0
Sep 16 02:58:17 genetti kernel: [19998.721718] [] ? mutex_lock_nested+0x27e/0x360
Sep 16 02:58:17 genetti kernel: [19998.721755] [] ? rrw_enter_read+0x58/0x1b0
Sep 16 02:58:17 genetti kernel: [19998.721790] [] rrw_enter_read+0x111/0x1b0
Sep 16 02:58:17 genetti kernel: [19998.721824] [] rrw_enter+0x18/0x20
Sep 16 02:58:17 genetti kernel: [19998.721861] [] dsl_pool_config_enter+0x18/0x20
Sep 16 02:58:17 genetti kernel: [19998.721898] [] dsl_scan_sync+0x10d/0xb30
Sep 16 02:58:17 genetti kernel: [19998.721936] [] ? trace_hardirqs_on+0xd/0x10
Sep 16 02:58:17 genetti kernel: [19998.721970] [] spa_sync+0x4ad/0xb60
Sep 16 02:58:17 genetti kernel: [19998.722003] [] ? ktime_get_ts+0x47/0xe0
Sep 16 02:58:17 genetti kernel: [19998.722035] [] txg_sync_thread+0x32e/0x600
Sep 16 02:58:17 genetti kernel: [19998.722066] [] ? kmem_free_debug+0x46/0x140
Sep 16 02:58:17 genetti kernel: [19998.722097] [] ? txg_quiesce_thread+0x4e0/0x4e0
Sep 16 02:58:17 genetti kernel: [19998.722128] [] thread_generic_wrapper+0x73/0x90
Sep 16 02:58:17 genetti kernel: [19998.722159] [] ? __thread_create+0x340/0x340
Sep 16 02:58:17 genetti kernel: [19998.722192] [] kthread+0xe5/0xf0
Sep 16 02:58:17 genetti kernel: [19998.722222] [] ? finish_task_switch+0x3a/0x110
Sep 16 02:58:17 genetti kernel: [19998.722254] [] ? kthread_create_on_node+0x160/0x160
Sep 16 02:58:17 genetti kernel: [19998.722288] [] ret_from_fork+0x7c/0xb0
Sep 16 02:58:17 genetti kernel: [19998.722317] [] ? kthread_create_on_node+0x160/0x160
Sep 16 02:58:24 genetti kernel: [20005.601759] SPL: Showing stack for process 1470
Sep 16 02:58:24 genetti kernel: [20005.601792] CPU: 15 PID: 1470 Comm: txg_sync Not tainted 3.10.12-kvm-ovs-zfs-iudex #1
Sep 16 02:58:24 genetti kernel: [20005.601837] Hardware name: Supermicro X9DR3-F/X9DR3-F, BIOS 2.0a 03/27/2013
Sep 16 02:58:24 genetti kernel: [20005.601867] ffff881fff851e20 ffff881fffb21a48 ffffffff816bb17c ffff881fffb21a58
Sep 16 02:58:24 genetti kernel: [20005.601921] ffffffff81173072 ffff881fffb21a98 ffffffff816ba32c ffffffff81a4b798
Sep 16 02:58:24 genetti kernel: [20005.601973] ffff881fff852150 00000000000005be ffff881fffb21b04 0000000000000018
Sep 16 02:58:24 genetti kernel: [20005.602026] Call Trace:
Sep 16 02:58:24 genetti kernel: [20005.602056] [] dump_stack+0x19/0x1b
Sep 16 02:58:24 genetti kernel: [20005.602087] [] spl_debug_dumpstack+0x22/0x40
Sep 16 02:58:24 genetti kernel: [20005.602117] [] sanitize_flags.part.10+0x68/0x77
Sep 16 02:58:24 genetti kernel: [20005.602147] [] kmem_alloc_debug+0x387/0x3b0
Sep 16 02:58:24 genetti kernel: [20005.602179] [] ? mutex_lock_nested+0x27e/0x360
Sep 16 02:58:24 genetti kernel: [20005.602210] [] ? rrw_enter_read+0x58/0x1b0
Sep 16 02:58:24 genetti kernel: [20005.602240] [] rrw_enter_read+0x111/0x1b0
Sep 16 02:58:24 genetti kernel: [20005.602268] [] rrw_enter+0x18/0x20
Sep 16 02:58:24 genetti kernel: [20005.602300] [] dsl_pool_config_enter+0x18/0x20
Sep 16 02:58:24 genetti kernel: [20005.602329] [] dsl_scan_sync+0x10d/0xb30
Sep 16 02:58:24 genetti kernel: [20005.602361] [] ? trace_hardirqs_on+0xd/0x10
Sep 16 02:58:24 genetti kernel: [20005.602391] [] spa_sync+0x4ad/0xb60
Sep 16 02:58:24 genetti kernel: [20005.602421] [] ? ktime_get_ts+0x47/0xe0
Sep 16 02:58:24 genetti kernel: [20005.602453] [] txg_sync_thread+0x32e/0x600
Sep 16 02:58:24 genetti kernel: [20005.602484] [] ? kmem_free_debug+0x46/0x140
Sep 16 02:58:24 genetti kernel: [20005.602517] [] ? txg_quiesce_thread+0x4e0/0x4e0
Sep 16 02:58:24 genetti kernel: [20005.602550] [] thread_generic_wrapper+0x73/0x90
Sep 16 02:58:24 genetti kernel: [20005.602584] [] ? __thread_create+0x340/0x340
Sep 16 02:58:24 genetti kernel: [20005.602617] [] kthread+0xe5/0xf0
Sep 16 02:58:24 genetti kernel: [20005.602646] [] ? finish_task_switch+0x3a/0x110
Sep 16 02:58:24 genetti kernel: [20005.602676] [] ? kthread_create_on_node+0x160/0x160
Sep 16 02:58:24 genetti kernel: [20005.602708] [] ret_from_fork+0x7c/0xb0
Sep 16 02:58:24 genetti kernel: [20005.602736] [] ? kthread_create_on_node+0x160/0x160
@tuomari
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tuomari commented Sep 16, 2013

Could be related to: #290
I have not yet had time to test the patch.

@behlendorf
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These warning were resolved in master.

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