* btrfsctl -d race with df -h causes hang?
@ 2009-11-19 23:05 John Dong
2009-11-19 23:10 ` John Dong
0 siblings, 1 reply; 7+ messages in thread
From: John Dong @ 2009-11-19 23:05 UTC (permalink / raw)
To: linux-btrfs
While attempting to do a full filesystem defrag and checking output of df -h, I've been able to fairly consistently generate a hang:
i.e. find / -type f -print0 | xargs -0i btrfsctl -d '{}'
and in another terminal, did "watch df -h"
Before long, everything hangs, iowait is near 100%, and no IO happens. I'm unable to get anything out of the kernel logs postmortem, dmesg also hangs.
FWIW, I was mounted -o compress.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: btrfsctl -d race with df -h causes hang?
2009-11-19 23:05 btrfsctl -d race with df -h causes hang? John Dong
@ 2009-11-19 23:10 ` John Dong
2009-11-19 23:18 ` John Dong
0 siblings, 1 reply; 7+ messages in thread
From: John Dong @ 2009-11-19 23:10 UTC (permalink / raw)
To: John Dong; +Cc: linux-btrfs
I forgot to mention, this is using Ubuntu Karmic's 2.6.31 kernel, with btrfs modules built from the btrfs-unstable.git latest head.
On Nov 19, 2009, at 6:05 PM, John Dong wrote:
> While attempting to do a full filesystem defrag and checking output of df -h, I've been able to fairly consistently generate a hang:
>
>
> i.e. find / -type f -print0 | xargs -0i btrfsctl -d '{}'
>
> and in another terminal, did "watch df -h"
>
> Before long, everything hangs, iowait is near 100%, and no IO happens. I'm unable to get anything out of the kernel logs postmortem, dmesg also hangs.
>
>
> FWIW, I was mounted -o compress.--
> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: btrfsctl -d race with df -h causes hang?
2009-11-19 23:10 ` John Dong
@ 2009-11-19 23:18 ` John Dong
2009-11-20 15:35 ` Chris Mason
0 siblings, 1 reply; 7+ messages in thread
From: John Dong @ 2009-11-19 23:18 UTC (permalink / raw)
To: John Dong; +Cc: linux-btrfs
Managed to get some kernel logs this time. Some sort of deadlock?
Nov 19 18:16:54 hideout kernel: [ 721.780120] INFO: task python:2318 blocked for more than 120 seconds.
Nov 19 18:16:54 hideout kernel: [ 721.780127] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 19 18:16:54 hideout kernel: [ 721.780130] python D 00000000ffffffff 0 2318 2177 0x00000000
Nov 19 18:16:54 hideout kernel: [ 721.780134] ffff8800370114b8 0000000000000082 ffff880037011468 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780138] ffff88003734c7c0 0000000000015880 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780141] 0000000000015880 ffff88003734c7c0 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780145] Call Trace:
Nov 19 18:16:54 hideout kernel: [ 721.780158] [<ffffffff810da710>] ? sync_page+0x0/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780165] [<ffffffff81527458>] io_schedule+0x28/0x40
Nov 19 18:16:54 hideout kernel: [ 721.780167] [<ffffffff810da74d>] sync_page+0x3d/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780170] [<ffffffff81527a42>] __wait_on_bit_lock+0x52/0xb0
Nov 19 18:16:54 hideout kernel: [ 721.780173] [<ffffffff810da6f2>] __lock_page+0x62/0x70
Nov 19 18:16:54 hideout kernel: [ 721.780179] [<ffffffff81078b70>] ? wake_bit_function+0x0/0x40
Nov 19 18:16:54 hideout kernel: [ 721.780182] [<ffffffff810db6c2>] ? unlock_page+0x22/0x30
Nov 19 18:16:54 hideout kernel: [ 721.780222] [<ffffffffa00cdebe>] T.904+0x25e/0x360 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780233] [<ffffffffa008f35c>] ? generic_bin_search+0x19c/0x210 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780246] [<ffffffffa00ce0d2>] extent_writepages+0x42/0x60 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780259] [<ffffffffa00b6180>] ? btrfs_get_extent+0x0/0x8c0 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780271] [<ffffffffa00d9a98>] ? btrfs_set_lock_blocking+0x18/0x20 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780284] [<ffffffffa00b0ad2>] btrfs_writepages+0x22/0x30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780287] [<ffffffff810e3918>] do_writepages+0x28/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780293] [<ffffffff8113edec>] writeback_single_inode+0x1bc/0x450
Nov 19 18:16:54 hideout kernel: [ 721.780297] [<ffffffff815293a9>] ? _spin_lock+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.780308] [<ffffffffa0099a5d>] ? btrfs_delalloc_reserve_space+0x5d/0x90 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780311] [<ffffffff8113f5c8>] generic_sync_sb_inodes+0x418/0x530
Nov 19 18:16:54 hideout kernel: [ 721.780315] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.780318] [<ffffffff8113f7f3>] writeback_inodes+0x63/0x110
Nov 19 18:16:54 hideout kernel: [ 721.780321] [<ffffffff810e2ee8>] balance_dirty_pages+0x1c8/0x340
Nov 19 18:16:54 hideout kernel: [ 721.780324] [<ffffffff810e30ac>] balance_dirty_pages_ratelimited_nr+0x4c/0x60
Nov 19 18:16:54 hideout kernel: [ 721.780337] [<ffffffffa00ba3d4>] btrfs_file_write+0x5f4/0x820 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780341] [<ffffffff8111ede8>] vfs_write+0xb8/0x1a0
Nov 19 18:16:54 hideout kernel: [ 721.780347] [<ffffffff811fb4b8>] ecryptfs_write_lower+0x78/0xf0
Nov 19 18:16:54 hideout kernel: [ 721.780350] [<ffffffff811fb04b>] ecryptfs_write_inode_size_to_header+0x6b/0xf0
Nov 19 18:16:54 hideout kernel: [ 721.780352] [<ffffffff811fb0e8>] ecryptfs_write_inode_size_to_metadata+0x18/0x30
Nov 19 18:16:54 hideout kernel: [ 721.780355] [<ffffffff811fb1ed>] ecryptfs_write_end+0xed/0x260
Nov 19 18:16:54 hideout kernel: [ 721.780358] [<ffffffff810da1e5>] generic_perform_write+0x125/0x1d0
Nov 19 18:16:54 hideout kernel: [ 721.780361] [<ffffffff810dafa3>] generic_file_buffered_write+0x83/0x140
Nov 19 18:16:54 hideout kernel: [ 721.780364] [<ffffffff810dc920>] __generic_file_aio_write_nolock+0x240/0x470
Nov 19 18:16:54 hideout kernel: [ 721.780367] [<ffffffff810ecef9>] ? shmem_truncate_range+0x489/0x810
Nov 19 18:16:54 hideout kernel: [ 721.780370] [<ffffffff810dcc70>] generic_file_aio_write+0x70/0xf0
Nov 19 18:16:54 hideout kernel: [ 721.780372] [<ffffffff810ed2a0>] ? shmem_delete_inode+0x0/0x100
Nov 19 18:16:54 hideout kernel: [ 721.780375] [<ffffffff8111eb02>] do_sync_write+0xf2/0x130
Nov 19 18:16:54 hideout kernel: [ 721.780379] [<ffffffff8104a809>] ? __wake_up_sync_key+0x59/0x70
Nov 19 18:16:54 hideout kernel: [ 721.780382] [<ffffffff81078b30>] ? autoremove_wake_function+0x0/0x40
Nov 19 18:16:54 hideout kernel: [ 721.780393] [<ffffffff81220521>] ? security_file_permission+0x11/0x20
Nov 19 18:16:54 hideout kernel: [ 721.780396] [<ffffffff8111ede8>] vfs_write+0xb8/0x1a0
Nov 19 18:16:54 hideout kernel: [ 721.780399] [<ffffffff8111f89c>] sys_write+0x4c/0x80
Nov 19 18:16:54 hideout kernel: [ 721.780402] [<ffffffff81012002>] system_call_fastpath+0x16/0x1b
Nov 19 18:16:54 hideout kernel: [ 721.780408] INFO: task python:23415 blocked for more than 120 seconds.
Nov 19 18:16:54 hideout kernel: [ 721.780409] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 19 18:16:54 hideout kernel: [ 721.780411] python D 0000000000000000 0 23415 16021 0x00000000
Nov 19 18:16:54 hideout kernel: [ 721.780414] ffff880041d79598 0000000000000086 ffff88000d8e3910 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780422] ffff880048579a60 0000000000015880 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780425] 0000000000015880 ffff880048579a60 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780428] Call Trace:
Nov 19 18:16:54 hideout kernel: [ 721.780431] [<ffffffff810da710>] ? sync_page+0x0/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780433] [<ffffffff81527458>] io_schedule+0x28/0x40
Nov 19 18:16:54 hideout kernel: [ 721.780436] [<ffffffff810da74d>] sync_page+0x3d/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780438] [<ffffffff81527a42>] __wait_on_bit_lock+0x52/0xb0
Nov 19 18:16:54 hideout kernel: [ 721.780441] [<ffffffff810da6f2>] __lock_page+0x62/0x70
Nov 19 18:16:54 hideout kernel: [ 721.780443] [<ffffffff81078b70>] ? wake_bit_function+0x0/0x40
Nov 19 18:16:54 hideout kernel: [ 721.780446] [<ffffffff810db6c2>] ? unlock_page+0x22/0x30
Nov 19 18:16:54 hideout kernel: [ 721.780459] [<ffffffffa00cdebe>] T.904+0x25e/0x360 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780472] [<ffffffffa00ce0d2>] extent_writepages+0x42/0x60 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780484] [<ffffffffa00b6180>] ? btrfs_get_extent+0x0/0x8c0 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780497] [<ffffffffa00b0ad2>] btrfs_writepages+0x22/0x30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780500] [<ffffffff810e3918>] do_writepages+0x28/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780502] [<ffffffff8113edec>] writeback_single_inode+0x1bc/0x450
Nov 19 18:16:54 hideout kernel: [ 721.780505] [<ffffffff811144d1>] ? __slab_free+0x91/0x120
Nov 19 18:16:54 hideout kernel: [ 721.780515] [<ffffffffa0099a5d>] ? btrfs_delalloc_reserve_space+0x5d/0x90 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780518] [<ffffffff8113f5c8>] generic_sync_sb_inodes+0x418/0x530
Nov 19 18:16:54 hideout kernel: [ 721.780522] [<ffffffff812762ce>] ? prop_fraction_single+0x4e/0x80
Nov 19 18:16:54 hideout kernel: [ 721.780525] [<ffffffff8113f7f3>] writeback_inodes+0x63/0x110
Nov 19 18:16:54 hideout kernel: [ 721.780528] [<ffffffff810e2ee8>] balance_dirty_pages+0x1c8/0x340
Nov 19 18:16:54 hideout kernel: [ 721.780531] [<ffffffff815293a9>] ? _spin_lock+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.780534] [<ffffffff810e30ac>] balance_dirty_pages_ratelimited_nr+0x4c/0x60
Nov 19 18:16:54 hideout kernel: [ 721.780537] [<ffffffff810f4443>] __do_fault+0x253/0x4e0
Nov 19 18:16:54 hideout kernel: [ 721.780539] [<ffffffff810f89d7>] handle_mm_fault+0x1a7/0x3c0
Nov 19 18:16:54 hideout kernel: [ 721.780542] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.780545] [<ffffffff8152bf4a>] do_page_fault+0x16a/0x370
Nov 19 18:16:54 hideout kernel: [ 721.780548] [<ffffffff815298c5>] page_fault+0x25/0x30
Nov 19 18:16:54 hideout kernel: [ 721.780551] [<ffffffff810d9e4f>] ? file_read_actor+0x3f/0x180
Nov 19 18:16:54 hideout kernel: [ 721.780553] [<ffffffff810d9f6d>] ? file_read_actor+0x15d/0x180
Nov 19 18:16:54 hideout kernel: [ 721.780556] [<ffffffff810db923>] T.768+0x253/0x440
Nov 19 18:16:54 hideout kernel: [ 721.780558] [<ffffffff810dbbc6>] generic_file_aio_read+0xb6/0x1d0
Nov 19 18:16:54 hideout kernel: [ 721.780561] [<ffffffff8111ec32>] do_sync_read+0xf2/0x130
Nov 19 18:16:54 hideout kernel: [ 721.780565] [<ffffffff8112c5ba>] ? do_filp_open+0x2ca/0xac0
Nov 19 18:16:54 hideout kernel: [ 721.780567] [<ffffffff815293a9>] ? _spin_lock+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.780570] [<ffffffff81078b30>] ? autoremove_wake_function+0x0/0x40
Nov 19 18:16:54 hideout kernel: [ 721.780573] [<ffffffff8112306f>] ? cp_new_stat+0xdf/0xf0
Nov 19 18:16:54 hideout kernel: [ 721.780576] [<ffffffff81220521>] ? security_file_permission+0x11/0x20
Nov 19 18:16:54 hideout kernel: [ 721.780579] [<ffffffff8111f215>] vfs_read+0xb5/0x1a0
Nov 19 18:16:54 hideout kernel: [ 721.780581] [<ffffffff8111f81c>] sys_read+0x4c/0x80
Nov 19 18:16:54 hideout kernel: [ 721.780584] [<ffffffff81012002>] system_call_fastpath+0x16/0x1b
Nov 19 18:16:54 hideout kernel: [ 721.780587] INFO: task pdflush:24402 blocked for more than 120 seconds.
Nov 19 18:16:54 hideout kernel: [ 721.780588] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 19 18:16:54 hideout kernel: [ 721.780590] pdflush D 00000000ffffffff 0 24402 2 0x00000000
Nov 19 18:16:54 hideout kernel: [ 721.780593] ffff8800210dba00 0000000000000046 0000000000000000 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780596] ffff880033545e70 0000000000015880 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780600] 0000000000015880 ffff880033545e70 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780603] Call Trace:
Nov 19 18:16:54 hideout kernel: [ 721.780605] [<ffffffff810da710>] ? sync_page+0x0/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780608] [<ffffffff81527458>] io_schedule+0x28/0x40
Nov 19 18:16:54 hideout kernel: [ 721.780610] [<ffffffff810da74d>] sync_page+0x3d/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780613] [<ffffffff81527a42>] __wait_on_bit_lock+0x52/0xb0
Nov 19 18:16:54 hideout kernel: [ 721.780615] [<ffffffff810da6f2>] __lock_page+0x62/0x70
Nov 19 18:16:54 hideout kernel: [ 721.780618] [<ffffffff81078b70>] ? wake_bit_function+0x0/0x40
Nov 19 18:16:54 hideout kernel: [ 721.780620] [<ffffffff810db6c2>] ? unlock_page+0x22/0x30
Nov 19 18:16:54 hideout kernel: [ 721.780632] [<ffffffffa00cdebe>] T.904+0x25e/0x360 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780645] [<ffffffffa00ce0d2>] extent_writepages+0x42/0x60 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780657] [<ffffffffa00b6180>] ? btrfs_get_extent+0x0/0x8c0 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780673] [<ffffffffa00b0ad2>] btrfs_writepages+0x22/0x30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780676] [<ffffffff810e3918>] do_writepages+0x28/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780679] [<ffffffff8113edec>] writeback_single_inode+0x1bc/0x450
Nov 19 18:16:54 hideout kernel: [ 721.780682] [<ffffffff81135166>] ? generic_forget_inode+0x1b6/0x240
Nov 19 18:16:54 hideout kernel: [ 721.780685] [<ffffffff811353a0>] ? generic_drop_inode+0x10/0x30
Nov 19 18:16:54 hideout kernel: [ 721.780687] [<ffffffff8113f5c8>] generic_sync_sb_inodes+0x418/0x530
Nov 19 18:16:54 hideout kernel: [ 721.780690] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.780693] [<ffffffff8113f7f3>] writeback_inodes+0x63/0x110
Nov 19 18:16:54 hideout kernel: [ 721.780696] [<ffffffff810e2c4e>] background_writeout+0xae/0xe0
Nov 19 18:16:54 hideout kernel: [ 721.780699] [<ffffffff810e411e>] __pdflush+0x13e/0x260
Nov 19 18:16:54 hideout kernel: [ 721.780701] [<ffffffff810e4240>] ? pdflush+0x0/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780704] [<ffffffff810e4288>] pdflush+0x48/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780706] [<ffffffff810e2ba0>] ? background_writeout+0x0/0xe0
Nov 19 18:16:54 hideout kernel: [ 721.780709] [<ffffffff810e4240>] ? pdflush+0x0/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780712] [<ffffffff81078746>] kthread+0xa6/0xb0
Nov 19 18:16:54 hideout kernel: [ 721.780715] [<ffffffff810130ea>] child_rip+0xa/0x20
Nov 19 18:16:54 hideout kernel: [ 721.780717] [<ffffffff810786a0>] ? kthread+0x0/0xb0
Nov 19 18:16:54 hideout kernel: [ 721.780719] [<ffffffff810130e0>] ? child_rip+0x0/0x20
Nov 19 18:16:54 hideout kernel: [ 721.780721] INFO: task btrfsctl:27925 blocked for more than 120 seconds.
Nov 19 18:16:54 hideout kernel: [ 721.780723] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 19 18:16:54 hideout kernel: [ 721.780725] btrfsctl D 00000000ffffffff 0 27925 13443 0x00000000
Nov 19 18:16:54 hideout kernel: [ 721.780728] ffff88000e3fb908 0000000000000086 0000000000000000 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780731] ffff88005e52de70 0000000000015880 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780734] 0000000000015880 ffff88005e52de70 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780737] Call Trace:
Nov 19 18:16:54 hideout kernel: [ 721.780740] [<ffffffff810da710>] ? sync_page+0x0/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780742] [<ffffffff81527458>] io_schedule+0x28/0x40
Nov 19 18:16:54 hideout kernel: [ 721.780745] [<ffffffff810da74d>] sync_page+0x3d/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780747] [<ffffffff81527a42>] __wait_on_bit_lock+0x52/0xb0
Nov 19 18:16:54 hideout kernel: [ 721.780749] [<ffffffff810da6f2>] __lock_page+0x62/0x70
Nov 19 18:16:54 hideout kernel: [ 721.780752] [<ffffffff81078b70>] ? wake_bit_function+0x0/0x40
Nov 19 18:16:54 hideout kernel: [ 721.780755] [<ffffffff810db6c2>] ? unlock_page+0x22/0x30
Nov 19 18:16:54 hideout kernel: [ 721.780767] [<ffffffffa00cdebe>] T.904+0x25e/0x360 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780780] [<ffffffffa00ce0d2>] extent_writepages+0x42/0x60 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780792] [<ffffffffa00b6180>] ? btrfs_get_extent+0x0/0x8c0 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780804] [<ffffffffa00b0ad2>] btrfs_writepages+0x22/0x30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780807] [<ffffffff810e3918>] do_writepages+0x28/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780810] [<ffffffff8113edec>] writeback_single_inode+0x1bc/0x450
Nov 19 18:16:54 hideout kernel: [ 721.780813] [<ffffffff81135166>] ? generic_forget_inode+0x1b6/0x240
Nov 19 18:16:54 hideout kernel: [ 721.780815] [<ffffffff811353a0>] ? generic_drop_inode+0x10/0x30
Nov 19 18:16:54 hideout kernel: [ 721.780818] [<ffffffff8113f5c8>] generic_sync_sb_inodes+0x418/0x530
Nov 19 18:16:54 hideout kernel: [ 721.780821] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.780824] [<ffffffff8113f7f3>] writeback_inodes+0x63/0x110
Nov 19 18:16:54 hideout kernel: [ 721.780827] [<ffffffff810e2ee8>] balance_dirty_pages+0x1c8/0x340
Nov 19 18:16:54 hideout kernel: [ 721.780830] [<ffffffff810e30ac>] balance_dirty_pages_ratelimited_nr+0x4c/0x60
Nov 19 18:16:54 hideout kernel: [ 721.780842] [<ffffffffa00d9942>] btrfs_ioctl+0x8f2/0xa30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780845] [<ffffffff8112ddfd>] vfs_ioctl+0x1d/0xa0
Nov 19 18:16:54 hideout kernel: [ 721.780847] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.780850] [<ffffffff8112e2e5>] file_ioctl+0x35/0x100
Nov 19 18:16:54 hideout kernel: [ 721.780853] [<ffffffff8127834a>] ? __up_read+0x9a/0xc0
Nov 19 18:16:54 hideout kernel: [ 721.780855] [<ffffffff8112e6fb>] do_vfs_ioctl+0x34b/0x370
Nov 19 18:16:54 hideout kernel: [ 721.780858] [<ffffffff8107cf29>] ? up_read+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.780861] [<ffffffff8152bf74>] ? do_page_fault+0x194/0x370
Nov 19 18:16:54 hideout kernel: [ 721.780863] [<ffffffff8112e7a1>] sys_ioctl+0x81/0xa0
Nov 19 18:16:54 hideout kernel: [ 721.780866] [<ffffffff81012002>] system_call_fastpath+0x16/0x1b
Nov 19 18:16:54 hideout kernel: [ 721.780868] INFO: task btrfsctl:27981 blocked for more than 120 seconds.
Nov 19 18:16:54 hideout kernel: [ 721.780870] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 19 18:16:54 hideout kernel: [ 721.780871] btrfsctl D 0000000000000000 0 27981 13443 0x00000000
Nov 19 18:16:54 hideout kernel: [ 721.780875] ffff88000398f908 0000000000000086 0000000000000000 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780881] ffff8800377a47c0 0000000000015880 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780884] 0000000000015880 ffff8800377a47c0 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.780887] Call Trace:
Nov 19 18:16:54 hideout kernel: [ 721.780890] [<ffffffff810da710>] ? sync_page+0x0/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780892] [<ffffffff81527458>] io_schedule+0x28/0x40
Nov 19 18:16:54 hideout kernel: [ 721.780895] [<ffffffff810da74d>] sync_page+0x3d/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780897] [<ffffffff81527a42>] __wait_on_bit_lock+0x52/0xb0
Nov 19 18:16:54 hideout kernel: [ 721.780899] [<ffffffff810da6f2>] __lock_page+0x62/0x70
Nov 19 18:16:54 hideout kernel: [ 721.780902] [<ffffffff81078b70>] ? wake_bit_function+0x0/0x40
Nov 19 18:16:54 hideout kernel: [ 721.780905] [<ffffffff810db6c2>] ? unlock_page+0x22/0x30
Nov 19 18:16:54 hideout kernel: [ 721.780917] [<ffffffffa00cdebe>] T.904+0x25e/0x360 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780930] [<ffffffffa00ce0d2>] extent_writepages+0x42/0x60 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780942] [<ffffffffa00b6180>] ? btrfs_get_extent+0x0/0x8c0 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780954] [<ffffffffa00b0ad2>] btrfs_writepages+0x22/0x30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.780958] [<ffffffff810e3918>] do_writepages+0x28/0x50
Nov 19 18:16:54 hideout kernel: [ 721.780960] [<ffffffff8113edec>] writeback_single_inode+0x1bc/0x450
Nov 19 18:16:54 hideout kernel: [ 721.780963] [<ffffffff815293a9>] ? _spin_lock+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.780969] [<ffffffff81110f06>] ? get_partial_node+0x86/0xa0
Nov 19 18:16:54 hideout kernel: [ 721.780972] [<ffffffff81114dfa>] ? __slab_alloc+0x8a/0x2d0
Nov 19 18:16:54 hideout kernel: [ 721.780975] [<ffffffff8113f5c8>] generic_sync_sb_inodes+0x418/0x530
Nov 19 18:16:54 hideout kernel: [ 721.780978] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.780980] [<ffffffff8113f7f3>] writeback_inodes+0x63/0x110
Nov 19 18:16:54 hideout kernel: [ 721.780983] [<ffffffff810e2ee8>] balance_dirty_pages+0x1c8/0x340
Nov 19 18:16:54 hideout kernel: [ 721.780986] [<ffffffff810e30ac>] balance_dirty_pages_ratelimited_nr+0x4c/0x60
Nov 19 18:16:54 hideout kernel: [ 721.780999] [<ffffffffa00d9942>] btrfs_ioctl+0x8f2/0xa30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781002] [<ffffffff8112ddfd>] vfs_ioctl+0x1d/0xa0
Nov 19 18:16:54 hideout kernel: [ 721.781004] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.781007] [<ffffffff8112e2e5>] file_ioctl+0x35/0x100
Nov 19 18:16:54 hideout kernel: [ 721.781010] [<ffffffff8127834a>] ? __up_read+0x9a/0xc0
Nov 19 18:16:54 hideout kernel: [ 721.781012] [<ffffffff8112e6fb>] do_vfs_ioctl+0x34b/0x370
Nov 19 18:16:54 hideout kernel: [ 721.781015] [<ffffffff8107cf29>] ? up_read+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.781017] [<ffffffff8152bf74>] ? do_page_fault+0x194/0x370
Nov 19 18:16:54 hideout kernel: [ 721.781019] [<ffffffff8112e7a1>] sys_ioctl+0x81/0xa0
Nov 19 18:16:54 hideout kernel: [ 721.781022] [<ffffffff81012002>] system_call_fastpath+0x16/0x1b
Nov 19 18:16:54 hideout kernel: [ 721.781025] INFO: task btrfsctl:27982 blocked for more than 120 seconds.
Nov 19 18:16:54 hideout kernel: [ 721.781026] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 19 18:16:54 hideout kernel: [ 721.781028] btrfsctl D 00000000ffffffff 0 27982 13443 0x00000000
Nov 19 18:16:54 hideout kernel: [ 721.781031] ffff880003991908 0000000000000082 ffff88005ef9bf40 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.781035] ffff880029d447c0 0000000000015880 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.781038] 0000000000015880 ffff880029d447c0 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.781041] Call Trace:
Nov 19 18:16:54 hideout kernel: [ 721.781043] [<ffffffff810da710>] ? sync_page+0x0/0x50
Nov 19 18:16:54 hideout kernel: [ 721.781046] [<ffffffff81527458>] io_schedule+0x28/0x40
Nov 19 18:16:54 hideout kernel: [ 721.781048] [<ffffffff810da74d>] sync_page+0x3d/0x50
Nov 19 18:16:54 hideout kernel: [ 721.781050] [<ffffffff81527a42>] __wait_on_bit_lock+0x52/0xb0
Nov 19 18:16:54 hideout kernel: [ 721.781053] [<ffffffff810da6f2>] __lock_page+0x62/0x70
Nov 19 18:16:54 hideout kernel: [ 721.781055] [<ffffffff81078b70>] ? wake_bit_function+0x0/0x40
Nov 19 18:16:54 hideout kernel: [ 721.781058] [<ffffffff810db6c2>] ? unlock_page+0x22/0x30
Nov 19 18:16:54 hideout kernel: [ 721.781070] [<ffffffffa00cdebe>] T.904+0x25e/0x360 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781083] [<ffffffffa00ce0d2>] extent_writepages+0x42/0x60 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781095] [<ffffffffa00b6180>] ? btrfs_get_extent+0x0/0x8c0 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781107] [<ffffffffa00b0ad2>] btrfs_writepages+0x22/0x30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781110] [<ffffffff810e3918>] do_writepages+0x28/0x50
Nov 19 18:16:54 hideout kernel: [ 721.781113] [<ffffffff8113edec>] writeback_single_inode+0x1bc/0x450
Nov 19 18:16:54 hideout kernel: [ 721.781116] [<ffffffff815293a9>] ? _spin_lock+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.781119] [<ffffffff81110e43>] ? add_partial+0x53/0x90
Nov 19 18:16:54 hideout kernel: [ 721.781121] [<ffffffff8113f5c8>] generic_sync_sb_inodes+0x418/0x530
Nov 19 18:16:54 hideout kernel: [ 721.781124] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.781127] [<ffffffff8113f7f3>] writeback_inodes+0x63/0x110
Nov 19 18:16:54 hideout kernel: [ 721.781133] [<ffffffff810e2ee8>] balance_dirty_pages+0x1c8/0x340
Nov 19 18:16:54 hideout kernel: [ 721.781136] [<ffffffff810e30ac>] balance_dirty_pages_ratelimited_nr+0x4c/0x60
Nov 19 18:16:54 hideout kernel: [ 721.781148] [<ffffffffa00d9942>] btrfs_ioctl+0x8f2/0xa30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781151] [<ffffffff8112ddfd>] vfs_ioctl+0x1d/0xa0
Nov 19 18:16:54 hideout kernel: [ 721.781154] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.781156] [<ffffffff8112e2e5>] file_ioctl+0x35/0x100
Nov 19 18:16:54 hideout kernel: [ 721.781159] [<ffffffff8127834a>] ? __up_read+0x9a/0xc0
Nov 19 18:16:54 hideout kernel: [ 721.781161] [<ffffffff8112e6fb>] do_vfs_ioctl+0x34b/0x370
Nov 19 18:16:54 hideout kernel: [ 721.781164] [<ffffffff8107cf29>] ? up_read+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.781167] [<ffffffff8152bf74>] ? do_page_fault+0x194/0x370
Nov 19 18:16:54 hideout kernel: [ 721.781169] [<ffffffff8112e7a1>] sys_ioctl+0x81/0xa0
Nov 19 18:16:54 hideout kernel: [ 721.781172] [<ffffffff81012002>] system_call_fastpath+0x16/0x1b
Nov 19 18:16:54 hideout kernel: [ 721.781174] INFO: task btrfsctl:27983 blocked for more than 120 seconds.
Nov 19 18:16:54 hideout kernel: [ 721.781176] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 19 18:16:54 hideout kernel: [ 721.781177] btrfsctl D 00000000ffffffff 0 27983 13443 0x00000000
Nov 19 18:16:54 hideout kernel: [ 721.781180] ffff880003809908 0000000000000086 ffff8800038098c8 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.781184] ffff880029d45e70 0000000000015880 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.781187] 0000000000015880 ffff880029d45e70 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.781190] Call Trace:
Nov 19 18:16:54 hideout kernel: [ 721.781192] [<ffffffff810da710>] ? sync_page+0x0/0x50
Nov 19 18:16:54 hideout kernel: [ 721.781195] [<ffffffff81527458>] io_schedule+0x28/0x40
Nov 19 18:16:54 hideout kernel: [ 721.781197] [<ffffffff810da74d>] sync_page+0x3d/0x50
Nov 19 18:16:54 hideout kernel: [ 721.781200] [<ffffffff81527a42>] __wait_on_bit_lock+0x52/0xb0
Nov 19 18:16:54 hideout kernel: [ 721.781202] [<ffffffff810da6f2>] __lock_page+0x62/0x70
Nov 19 18:16:54 hideout kernel: [ 721.781205] [<ffffffff81078b70>] ? wake_bit_function+0x0/0x40
Nov 19 18:16:54 hideout kernel: [ 721.781207] [<ffffffff810db6c2>] ? unlock_page+0x22/0x30
Nov 19 18:16:54 hideout kernel: [ 721.781219] [<ffffffffa00cdebe>] T.904+0x25e/0x360 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781232] [<ffffffffa00ce0d2>] extent_writepages+0x42/0x60 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781244] [<ffffffffa00b6180>] ? btrfs_get_extent+0x0/0x8c0 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781257] [<ffffffffa00b0ad2>] btrfs_writepages+0x22/0x30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781260] [<ffffffff810e3918>] do_writepages+0x28/0x50
Nov 19 18:16:54 hideout kernel: [ 721.781262] [<ffffffff8113edec>] writeback_single_inode+0x1bc/0x450
Nov 19 18:16:54 hideout kernel: [ 721.781265] [<ffffffff815270f9>] ? thread_return+0x48/0x37f
Nov 19 18:16:54 hideout kernel: [ 721.781268] [<ffffffff8113f5c8>] generic_sync_sb_inodes+0x418/0x530
Nov 19 18:16:54 hideout kernel: [ 721.781271] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.781274] [<ffffffff8113f7f3>] writeback_inodes+0x63/0x110
Nov 19 18:16:54 hideout kernel: [ 721.781276] [<ffffffff810e2ee8>] balance_dirty_pages+0x1c8/0x340
Nov 19 18:16:54 hideout kernel: [ 721.781279] [<ffffffff810e30ac>] balance_dirty_pages_ratelimited_nr+0x4c/0x60
Nov 19 18:16:54 hideout kernel: [ 721.781291] [<ffffffffa00d9942>] btrfs_ioctl+0x8f2/0xa30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781294] [<ffffffff8112ddfd>] vfs_ioctl+0x1d/0xa0
Nov 19 18:16:54 hideout kernel: [ 721.781297] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.781299] [<ffffffff8112e2e5>] file_ioctl+0x35/0x100
Nov 19 18:16:54 hideout kernel: [ 721.781302] [<ffffffff8127834a>] ? __up_read+0x9a/0xc0
Nov 19 18:16:54 hideout kernel: [ 721.781304] [<ffffffff8112e6fb>] do_vfs_ioctl+0x34b/0x370
Nov 19 18:16:54 hideout kernel: [ 721.781307] [<ffffffff8107cf29>] ? up_read+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.781310] [<ffffffff8152bf74>] ? do_page_fault+0x194/0x370
Nov 19 18:16:54 hideout kernel: [ 721.781312] [<ffffffff8112e7a1>] sys_ioctl+0x81/0xa0
Nov 19 18:16:54 hideout kernel: [ 721.781315] [<ffffffff81012002>] system_call_fastpath+0x16/0x1b
Nov 19 18:16:54 hideout kernel: [ 721.781317] INFO: task btrfsctl:27985 blocked for more than 120 seconds.
Nov 19 18:16:54 hideout kernel: [ 721.781319] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 19 18:16:54 hideout kernel: [ 721.781320] btrfsctl D 0000000000000000 0 27985 13443 0x00000000
Nov 19 18:16:54 hideout kernel: [ 721.781323] ffff880003a1d908 0000000000000086 ffff88005ef9bf40 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.781327] ffff880029d43110 0000000000015880 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.781330] 0000000000015880 ffff880029d43110 0000000000015880 0000000000015880
Nov 19 18:16:54 hideout kernel: [ 721.781333] Call Trace:
Nov 19 18:16:54 hideout kernel: [ 721.781335] [<ffffffff810da710>] ? sync_page+0x0/0x50
Nov 19 18:16:54 hideout kernel: [ 721.781338] [<ffffffff81527458>] io_schedule+0x28/0x40
Nov 19 18:16:54 hideout kernel: [ 721.781340] [<ffffffff810da74d>] sync_page+0x3d/0x50
Nov 19 18:16:54 hideout kernel: [ 721.781424] [<ffffffff81527a42>] __wait_on_bit_lock+0x52/0xb0
Nov 19 18:16:54 hideout kernel: [ 721.781427] [<ffffffff810da6f2>] __lock_page+0x62/0x70
Nov 19 18:16:54 hideout kernel: [ 721.781429] [<ffffffff81078b70>] ? wake_bit_function+0x0/0x40
Nov 19 18:16:54 hideout kernel: [ 721.781432] [<ffffffff810db6c2>] ? unlock_page+0x22/0x30
Nov 19 18:16:54 hideout kernel: [ 721.781445] [<ffffffffa00cdebe>] T.904+0x25e/0x360 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781458] [<ffffffffa00ce0d2>] extent_writepages+0x42/0x60 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781470] [<ffffffffa00b6180>] ? btrfs_get_extent+0x0/0x8c0 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781482] [<ffffffffa00b0ad2>] btrfs_writepages+0x22/0x30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781485] [<ffffffff810e3918>] do_writepages+0x28/0x50
Nov 19 18:16:54 hideout kernel: [ 721.781488] [<ffffffff8113edec>] writeback_single_inode+0x1bc/0x450
Nov 19 18:16:54 hideout kernel: [ 721.781491] [<ffffffff815270f9>] ? thread_return+0x48/0x37f
Nov 19 18:16:54 hideout kernel: [ 721.781494] [<ffffffff8113f5c8>] generic_sync_sb_inodes+0x418/0x530
Nov 19 18:16:54 hideout kernel: [ 721.781497] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.781500] [<ffffffff8113f7f3>] writeback_inodes+0x63/0x110
Nov 19 18:16:54 hideout kernel: [ 721.781502] [<ffffffff810e2ee8>] balance_dirty_pages+0x1c8/0x340
Nov 19 18:16:54 hideout kernel: [ 721.781506] [<ffffffff810e30ac>] balance_dirty_pages_ratelimited_nr+0x4c/0x60
Nov 19 18:16:54 hideout kernel: [ 721.781518] [<ffffffffa00d9942>] btrfs_ioctl+0x8f2/0xa30 [btrfs]
Nov 19 18:16:54 hideout kernel: [ 721.781520] [<ffffffff8112ddfd>] vfs_ioctl+0x1d/0xa0
Nov 19 18:16:54 hideout kernel: [ 721.781523] [<ffffffff81036419>] ? default_spin_lock_flags+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.781526] [<ffffffff8112e2e5>] file_ioctl+0x35/0x100
Nov 19 18:16:54 hideout kernel: [ 721.781528] [<ffffffff8127834a>] ? __up_read+0x9a/0xc0
Nov 19 18:16:54 hideout kernel: [ 721.781531] [<ffffffff8112e6fb>] do_vfs_ioctl+0x34b/0x370
Nov 19 18:16:54 hideout kernel: [ 721.781533] [<ffffffff8107cf29>] ? up_read+0x9/0x10
Nov 19 18:16:54 hideout kernel: [ 721.781536] [<ffffffff8152bf74>] ? do_page_fault+0x194/0x370
Nov 19 18:16:54 hideout kernel: [ 721.781538] [<ffffffff8112e7a1>] sys_ioctl+0x81/0xa0
Nov 19 18:16:54 hideout kernel: [ 721.781541] [<ffffffff81012002>] system_call_fastpath+0x16/0x1b
On Nov 19, 2009, at 6:10 PM, John Dong wrote:
> I forgot to mention, this is using Ubuntu Karmic's 2.6.31 kernel, with btrfs modules built from the btrfs-unstable.git latest head.
> On Nov 19, 2009, at 6:05 PM, John Dong wrote:
>
>> While attempting to do a full filesystem defrag and checking output of df -h, I've been able to fairly consistently generate a hang:
>>
>>
>> i.e. find / -type f -print0 | xargs -0i btrfsctl -d '{}'
>>
>> and in another terminal, did "watch df -h"
>>
>> Before long, everything hangs, iowait is near 100%, and no IO happens. I'm unable to get anything out of the kernel logs postmortem, dmesg also hangs.
>>
>>
>> FWIW, I was mounted -o compress.--
>> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: btrfsctl -d race with df -h causes hang?
2009-11-19 23:18 ` John Dong
@ 2009-11-20 15:35 ` Chris Mason
2009-11-20 15:48 ` John Dong
2009-11-22 16:42 ` John Dong
0 siblings, 2 replies; 7+ messages in thread
From: Chris Mason @ 2009-11-20 15:35 UTC (permalink / raw)
To: John Dong; +Cc: linux-btrfs
On Thu, Nov 19, 2009 at 06:18:49PM -0500, John Dong wrote:
> Managed to get some kernel logs this time. Some sort of deadlock?
Ok, if you can still access the machine could you please run sysrq-w and
sysrq-t. That will print out the stacks of the stuck procs. We've
probably got a lock inversion hiding in the df handling.
-chris
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: btrfsctl -d race with df -h causes hang?
2009-11-20 15:35 ` Chris Mason
@ 2009-11-20 15:48 ` John Dong
2009-11-22 16:42 ` John Dong
1 sibling, 0 replies; 7+ messages in thread
From: John Dong @ 2009-11-20 15:48 UTC (permalink / raw)
To: Chris Mason; +Cc: linux-btrfs
[-- Attachment #1: Type: text/plain, Size: 90 bytes --]
Hi Chris, reproduced the hang; attached are the logs from the sysrq's you suggested.
[-- Attachment #2: sysrq.txt.gz --]
[-- Type: application/x-gzip, Size: 22046 bytes --]
[-- Attachment #3: Type: text/plain, Size: 604 bytes --]
On Nov 20, 2009, at 10:35 AM, Chris Mason wrote:
> On Thu, Nov 19, 2009 at 06:18:49PM -0500, John Dong wrote:
>> Managed to get some kernel logs this time. Some sort of deadlock?
>
> Ok, if you can still access the machine could you please run sysrq-w and
> sysrq-t. That will print out the stacks of the stuck procs. We've
> probably got a lock inversion hiding in the df handling.
>
> -chris
> --
> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: btrfsctl -d race with df -h causes hang?
2009-11-20 15:35 ` Chris Mason
2009-11-20 15:48 ` John Dong
@ 2009-11-22 16:42 ` John Dong
2009-12-02 6:30 ` John Dong
1 sibling, 1 reply; 7+ messages in thread
From: John Dong @ 2009-11-22 16:42 UTC (permalink / raw)
To: Chris Mason; +Cc: linux-btrfs
On Nov 20, 2009, at 10:35 AM, Chris Mason wrote:
> We've
> probably got a lock inversion hiding in the df handling.
Hi Chris, just an update; I've been able to get the hang to happen without issuing df. It seems like the btrfsctl -d activity combined with -o compress is enough to trigger it.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: btrfsctl -d race with df -h causes hang?
2009-11-22 16:42 ` John Dong
@ 2009-12-02 6:30 ` John Dong
0 siblings, 0 replies; 7+ messages in thread
From: John Dong @ 2009-12-02 6:30 UTC (permalink / raw)
To: John Dong; +Cc: Chris Mason, linux-btrfs
Anything else I can do to help? I can definitely still consistently reproduce this behavior...
On Nov 22, 2009, at 11:42 AM, John Dong wrote:
>
> On Nov 20, 2009, at 10:35 AM, Chris Mason wrote:
>
>> We've
>> probably got a lock inversion hiding in the df handling.
>
>
> Hi Chris, just an update; I've been able to get the hang to happen without issuing df. It seems like the btrfsctl -d activity combined with -o compress is enough to trigger it.--
> To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2009-12-02 6:30 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2009-11-19 23:05 btrfsctl -d race with df -h causes hang? John Dong
2009-11-19 23:10 ` John Dong
2009-11-19 23:18 ` John Dong
2009-11-20 15:35 ` Chris Mason
2009-11-20 15:48 ` John Dong
2009-11-22 16:42 ` John Dong
2009-12-02 6:30 ` John Dong
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