Public bug reported:
I/O for multiple programs, like `thunderbird`, `firefox`, etc., hangs
for minutes, `dmesg` contains
[ 9184.451606] INFO: task txg_sync:11471 blocked for more than 120 seconds.
[ 9184.451610] Tainted: P OE 4.8.0-32-generic #34-Ubuntu
[ 9184.451611] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 9184.451612] txg_sync D ffffa240ab3a7aa8 0 11471 2
0x00000000
[ 9184.451616] ffffa240ab3a7aa8 00ffffffbb6ade1f ffffa24095148000
ffffa240e5ca5580
[ 9184.451618] 0000000000000046 ffffa240ab3a8000 ffffa240ff359200
7fffffffffffffff
[ 9184.451620] ffffa23d36cf9050 0000000000000001 ffffa240ab3a7ac0
ffffffffbbe96b15
[ 9184.451621] Call Trace:
[ 9184.451627] [<ffffffffbbe96b15>] schedule+0x35/0x80
[ 9184.451628] [<ffffffffbbe9a2ca>] schedule_timeout+0x22a/0x3f0
[ 9184.451631] [<ffffffffbb62c77e>] ? __switch_to+0x2ce/0x6c0
[ 9184.451633] [<ffffffffbb6c156c>] ? pick_next_task_fair+0x48c/0x4c0
[ 9184.451635] [<ffffffffbb6fc511>] ? ktime_get+0x41/0xb0
[ 9184.451636] [<ffffffffbbe96304>] io_schedule_timeout+0xa4/0x110
[ 9184.451644] [<ffffffffc0acee12>] cv_wait_common+0xb2/0x130 [spl]
[ 9184.451646] [<ffffffffbb6c7150>] ? wake_atomic_t_function+0x60/0x60
[ 9184.451650] [<ffffffffc0aceee8>] __cv_wait_io+0x18/0x20 [spl]
[ 9184.451689] [<ffffffffc0ebfcdd>] zio_wait+0xfd/0x1d0 [zfs]
[ 9184.451716] [<ffffffffc0e4b2c8>] dsl_pool_sync+0xb8/0x480 [zfs]
[ 9184.451745] [<ffffffffc0e6650f>] spa_sync+0x37f/0xb30 [zfs]
[ 9184.451747] [<ffffffffbb6aecd2>] ? default_wake_function+0x12/0x20
[ 9184.451779] [<ffffffffc0e77195>] txg_sync_thread+0x3a5/0x600 [zfs]
[ 9184.451807] [<ffffffffc0e76df0>] ? txg_delay+0x160/0x160 [zfs]
[ 9184.451811] [<ffffffffc0ac9fb1>] thread_generic_wrapper+0x71/0x80 [spl]
[ 9184.451815] [<ffffffffc0ac9f40>] ? __thread_exit+0x20/0x20 [spl]
[ 9184.451817] [<ffffffffbb6a3e58>] kthread+0xd8/0xf0
[ 9184.451819] [<ffffffffbbe9b4df>] ret_from_fork+0x1f/0x40
[ 9184.451821] [<ffffffffbb6a3d80>] ? kthread_create_on_node+0x1e0/0x1e0
[ 9184.451849] INFO: task mozStorage #2:21607 blocked for more than 120
seconds.
[ 9184.451851] Tainted: P OE 4.8.0-32-generic #34-Ubuntu
[ 9184.451852] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 9184.451853] mozStorage #2 D ffffa23fe8a5bd38 0 21607 19750
0x00000004
[ 9184.451855] ffffa23fe8a5bd38 00ffa240ee8feb40 ffffa240ecf72ac0
ffffa2403803b900
[ 9184.451857] ffffffffbc2c02f7 ffffa23fe8a5c000 ffffa240aa940828
ffffa240aa940800
[ 9184.451858] ffffa240aa940980 0000000000000000 ffffa23fe8a5bd50
ffffffffbbe96b15
[ 9184.451860] Call Trace:
[ 9184.451861] [<ffffffffbbe96b15>] schedule+0x35/0x80
[ 9184.451866] [<ffffffffc0acee70>] cv_wait_common+0x110/0x130 [spl]
[ 9184.451868] [<ffffffffbb6c7150>] ? wake_atomic_t_function+0x60/0x60
[ 9184.451872] [<ffffffffc0aceea5>] __cv_wait+0x15/0x20 [spl]
[ 9184.451904] [<ffffffffc0eb9759>] zil_commit.part.11+0x79/0x7a0 [zfs]
[ 9184.451909] [<ffffffffc0acf9f6>] ? tsd_hash_search.isra.0+0x46/0xa0
[spl]
[ 9184.451913] [<ffffffffc0ad0214>] ? tsd_set+0x2b4/0x500 [spl]
[ 9184.451914] [<ffffffffbbe98a82>] ? mutex_lock+0x12/0x30
[ 9184.451945] [<ffffffffc0eb9e97>] zil_commit+0x17/0x20 [zfs]
[ 9184.451975] [<ffffffffc0eaf2aa>] zfs_fsync+0x7a/0xf0 [zfs]
[ 9184.452005] [<ffffffffc0ec5878>] zpl_fsync+0x68/0xa0 [zfs]
[ 9184.452008] [<ffffffffbb868b9b>] vfs_fsync_range+0x4b/0xb0
[ 9184.452010] [<ffffffffbb868c5d>] do_fsync+0x3d/0x70
[ 9184.452011] [<ffffffffbb868ef0>] SyS_fsync+0x10/0x20
[ 9184.452013] [<ffffffffbbe9b2b6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[ 9184.452023] INFO: task bitcoin-msghand:663 blocked for more than 120
seconds.
[ 9184.452024] Tainted: P OE 4.8.0-32-generic #34-Ubuntu
[ 9184.452025] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 9184.452026] bitcoin-msghand D ffffa23eeb23bd38 0 663 26994
0x00000000
[ 9184.452028] ffffa23eeb23bd38 00ffa23eab434000 ffffa240ecf70000
ffffa24095148000
[ 9184.452030] ffffa23eeb23bd20 ffffa23eeb23c000 ffffa240aa940828
ffffa240aa940800
[ 9184.452031] ffffa240aa940980 0000000000000000 ffffa23eeb23bd50
ffffffffbbe96b15
[ 9184.452033] Call Trace:
[ 9184.452034] [<ffffffffbbe96b15>] schedule+0x35/0x80
[ 9184.452039] [<ffffffffc0acee70>] cv_wait_common+0x110/0x130 [spl]
[ 9184.452041] [<ffffffffbb6c7150>] ? wake_atomic_t_function+0x60/0x60
[ 9184.452044] [<ffffffffc0aceea5>] __cv_wait+0x15/0x20 [spl]
[ 9184.452074] [<ffffffffc0eb9759>] zil_commit.part.11+0x79/0x7a0 [zfs]
[ 9184.452079] [<ffffffffc0acf9f6>] ? tsd_hash_search.isra.0+0x46/0xa0
[spl]
[ 9184.452083] [<ffffffffc0ad0214>] ? tsd_set+0x2b4/0x500 [spl]
[ 9184.452084] [<ffffffffbbe98a82>] ? mutex_lock+0x12/0x30
[ 9184.452113] [<ffffffffc0eb9e97>] zil_commit+0x17/0x20 [zfs]
[ 9184.452141] [<ffffffffc0eaf2aa>] zfs_fsync+0x7a/0xf0 [zfs]
[ 9184.452168] [<ffffffffc0ec5878>] zpl_fsync+0x68/0xa0 [zfs]
[ 9184.452170] [<ffffffffbb868b9b>] vfs_fsync_range+0x4b/0xb0
[ 9184.452172] [<ffffffffbb868c5d>] do_fsync+0x3d/0x70
[ 9184.452173] [<ffffffffbb868f13>] SyS_fdatasync+0x13/0x20
[ 9184.452174] [<ffffffffbbe9b2b6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[ 9305.221219] INFO: task txg_sync:11471 blocked for more than 120 seconds.
[ 9305.221223] Tainted: P OE 4.8.0-32-generic #34-Ubuntu
[ 9305.221224] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 9305.221225] txg_sync D ffffa240ab3a7aa8 0 11471 2
0x00000000
[ 9305.221229] ffffa240ab3a7aa8 00ffffffbb6ade1f ffffa24095148000
ffffa240e5ca5580
[ 9305.221230] 0000000000000046 ffffa240ab3a8000 ffffa240ff359200
7fffffffffffffff
[ 9305.221232] ffffa23d36cf9050 0000000000000001 ffffa240ab3a7ac0
ffffffffbbe96b15
[ 9305.221234] Call Trace:
[ 9305.221239] [<ffffffffbbe96b15>] schedule+0x35/0x80
[ 9305.221241] [<ffffffffbbe9a2ca>] schedule_timeout+0x22a/0x3f0
[ 9305.221243] [<ffffffffbb62c77e>] ? __switch_to+0x2ce/0x6c0
[ 9305.221245] [<ffffffffbb6c156c>] ? pick_next_task_fair+0x48c/0x4c0
[ 9305.221247] [<ffffffffbb6fc511>] ? ktime_get+0x41/0xb0
[ 9305.221249] [<ffffffffbbe96304>] io_schedule_timeout+0xa4/0x110
[ 9305.221256] [<ffffffffc0acee12>] cv_wait_common+0xb2/0x130 [spl]
[ 9305.221258] [<ffffffffbb6c7150>] ? wake_atomic_t_function+0x60/0x60
[ 9305.221262] [<ffffffffc0aceee8>] __cv_wait_io+0x18/0x20 [spl]
[ 9305.221301] [<ffffffffc0ebfcdd>] zio_wait+0xfd/0x1d0 [zfs]
[ 9305.221328] [<ffffffffc0e4b2c8>] dsl_pool_sync+0xb8/0x480 [zfs]
[ 9305.221357] [<ffffffffc0e6650f>] spa_sync+0x37f/0xb30 [zfs]
[ 9305.221359] [<ffffffffbb6aecd2>] ? default_wake_function+0x12/0x20
[ 9305.221389] [<ffffffffc0e77195>] txg_sync_thread+0x3a5/0x600 [zfs]
[ 9305.221417] [<ffffffffc0e76df0>] ? txg_delay+0x160/0x160 [zfs]
[ 9305.221421] [<ffffffffc0ac9fb1>] thread_generic_wrapper+0x71/0x80 [spl]
[ 9305.221424] [<ffffffffc0ac9f40>] ? __thread_exit+0x20/0x20 [spl]
[ 9305.221426] [<ffffffffbb6a3e58>] kthread+0xd8/0xf0
[ 9305.221428] [<ffffffffbbe9b4df>] ret_from_fork+0x1f/0x40
[ 9305.221430] [<ffffffffbb6a3d80>] ? kthread_create_on_node+0x1e0/0x1e0
[ 9305.221458] INFO: task mozStorage #2:21607 blocked for more than 120
seconds.
[ 9305.221459] Tainted: P OE 4.8.0-32-generic #34-Ubuntu
[ 9305.221460] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 9305.221461] mozStorage #2 D ffffa23fe8a5bd38 0 21607 19750
0x00000004
[ 9305.221463] ffffa23fe8a5bd38 00ffa240ee8feb40 ffffa240ecf72ac0
ffffa2403803b900
[ 9305.221465] ffffffffbc2c02f7 ffffa23fe8a5c000 ffffa240aa940828
ffffa240aa940800
[ 9305.221466] ffffa240aa940980 0000000000000000 ffffa23fe8a5bd50
ffffffffbbe96b15
[ 9305.221468] Call Trace:
[ 9305.221469] [<ffffffffbbe96b15>] schedule+0x35/0x80
[ 9305.221474] [<ffffffffc0acee70>] cv_wait_common+0x110/0x130 [spl]
[ 9305.221475] [<ffffffffbb6c7150>] ? wake_atomic_t_function+0x60/0x60
[ 9305.221479] [<ffffffffc0aceea5>] __cv_wait+0x15/0x20 [spl]
[ 9305.221510] [<ffffffffc0eb9759>] zil_commit.part.11+0x79/0x7a0 [zfs]
[ 9305.221515] [<ffffffffc0acf9f6>] ? tsd_hash_search.isra.0+0x46/0xa0
[spl]
[ 9305.221519] [<ffffffffc0ad0214>] ? tsd_set+0x2b4/0x500 [spl]
[ 9305.221520] [<ffffffffbbe98a82>] ? mutex_lock+0x12/0x30
[ 9305.221551] [<ffffffffc0eb9e97>] zil_commit+0x17/0x20 [zfs]
[ 9305.221582] [<ffffffffc0eaf2aa>] zfs_fsync+0x7a/0xf0 [zfs]
[ 9305.221611] [<ffffffffc0ec5878>] zpl_fsync+0x68/0xa0 [zfs]
[ 9305.221614] [<ffffffffbb868b9b>] vfs_fsync_range+0x4b/0xb0
[ 9305.221616] [<ffffffffbb868c5d>] do_fsync+0x3d/0x70
[ 9305.221618] [<ffffffffbb868ef0>] SyS_fsync+0x10/0x20
[ 9305.221619] [<ffffffffbbe9b2b6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
[ 9305.221621] INFO: task mozStorage #8:5507 blocked for more than 120
seconds.
[ 9305.221622] Tainted: P OE 4.8.0-32-generic #34-Ubuntu
[ 9305.221623] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[ 9305.221624] mozStorage #8 D ffffa23f1573fc18 0 5507 19750
0x00000004
[ 9305.221625] ffffa23f1573fc18 00000179907cd000 ffffa240ecf72ac0
ffffa23f944b9c80
[ 9305.221627] ffffa240ec957188 ffffa23f15740000 ffffa240ff319200
7fffffffffffffff
[ 9305.221629] ffffa23d0ac9a5e0 0000000000000001 ffffa23f1573fc30
ffffffffbbe96b15
[ 9305.221630] Call Trace:
[ 9305.221631] [<ffffffffbbe96b15>] schedule+0x35/0x80
[ 9305.221633] [<ffffffffbbe9a2ca>] schedule_timeout+0x22a/0x3f0
[ 9305.221662] [<ffffffffc0ebdb50>] ? zio_taskq_member.isra.6+0x90/0x90
[zfs]
[ 9305.221666] [<ffffffffc0aca9ae>] ? taskq_dispatch_ent+0x4e/0x120 [spl]
[ 9305.221668] [<ffffffffbb6fc511>] ? ktime_get+0x41/0xb0
[ 9305.221669] [<ffffffffbbe96304>] io_schedule_timeout+0xa4/0x110
[ 9305.221673] [<ffffffffc0acee12>] cv_wait_common+0xb2/0x130 [spl]
[ 9305.221674] [<ffffffffbb6c7150>] ? wake_atomic_t_function+0x60/0x60
[ 9305.221678] [<ffffffffc0aceee8>] __cv_wait_io+0x18/0x20 [spl]
[ 9305.221706] [<ffffffffc0ebfcdd>] zio_wait+0xfd/0x1d0 [zfs]
[ 9305.221736] [<ffffffffc0eb9aa6>] zil_commit.part.11+0x3c6/0x7a0 [zfs]
[ 9305.221740] [<ffffffffc0acf9f6>] ? tsd_hash_search.isra.0+0x46/0xa0
[spl]
[ 9305.221768] [<ffffffffc0eb9e97>] zil_commit+0x17/0x20 [zfs]
[ 9305.221798] [<ffffffffc0eaf2aa>] zfs_fsync+0x7a/0xf0 [zfs]
[ 9305.221829] [<ffffffffc0ec5878>] zpl_fsync+0x68/0xa0 [zfs]
[ 9305.221833] [<ffffffffbb868b9b>] vfs_fsync_range+0x4b/0xb0
[ 9305.221834] [<ffffffffbb868c5d>] do_fsync+0x3d/0x70
[ 9305.221836] [<ffffffffbb868ef0>] SyS_fsync+0x10/0x20
[ 9305.221838] [<ffffffffbbe9b2b6>] entry_SYSCALL_64_fastpath+0x1e/0xa8
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: zfs-dkms 0.6.5.8-0ubuntu4.1
ProcVersionSignature: Ubuntu 4.8.0-32.34-generic 4.8.11
Uname: Linux 4.8.0-32-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Jan 6 10:19:22 2017
InstallationDate: Installed on 2015-12-12 (390 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
SourcePackage: zfs-linux
UpgradeStatus: Upgraded to yakkety on 2016-10-17 (80 days ago)
** Affects: zfs-linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug yakkety
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https://bugs.launchpad.net/bugs/1654517
Title:
ZFS I/O hangs for minutes
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