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Bug #16630
closedrbd map vs rbd_watch_errcb deadlock
% Done:
0%
Source:
other
Tags:
Backport:
Regression:
No
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Crash signature (v1):
Crash signature (v2):
Description
On Fri, Jul 8, 2016 at 3:28 AM, Patrick McLean <patrickm@gaikai.com> wrote: > This is on linus git master as of 2016/07/01 > > [...] > > # grep -C 40 rbd /proc/*/stack > /proc/14109/stack-[<ffffffff8111c7c4>] __queue_work+0x144/0x420 > /proc/14109/stack-[<ffffffff8112c1c0>] default_wake_function+0x0/0x10 > /proc/14109/stack:[<ffffffffa01561ee>] > rbd_obj_method_sync.constprop.48+0x1be/0x290 [rbd] > /proc/14109/stack:[<ffffffffa0156aea>] rbd_dev_header_info+0x15a/0x930 [rbd] > /proc/14109/stack:[<ffffffffa0157450>] rbd_watch_cb+0x0/0xa0 [rbd] > /proc/14109/stack:[<ffffffffa0157586>] > rbd_dev_image_probe.part.42+0x96/0x910 [rbd] > /proc/14109/stack:[<ffffffffa015640e>] rbd_dev_image_id+0x14e/0x1b0 [rbd] > /proc/14109/stack:[<ffffffffa015828f>] do_rbd_add.isra.43+0x48f/0xbb0 [rbd] > /proc/14109/stack-[<ffffffff8123ba27>] __kmalloc+0x27/0x170 > /proc/14109/stack-[<ffffffff812b7f3a>] kernfs_fop_write+0x10a/0x190 > /proc/14109/stack-[<ffffffff8124dc63>] __vfs_write+0x23/0x120 > /proc/14109/stack-[<ffffffff8124e8f3>] vfs_write+0xb3/0x1a0 > /proc/14109/stack-[<ffffffff8124fbd2>] SyS_write+0x42/0xa0 > /proc/14109/stack-[<ffffffff81816f72>] entry_SYSCALL_64_fastpath+0x1a/0xa4 > /proc/14109/stack-[<ffffffffffffffff>] 0xffffffffffffffff > -- > /proc/29744/stack-[<ffffffff813c7c63>] call_rwsem_down_write_failed+0x13/0x20 > /proc/29744/stack:[<ffffffffa01572dd>] rbd_dev_refresh+0x1d/0xf0 [rbd] > /proc/29744/stack:[<ffffffffa0157413>] rbd_watch_errcb+0x33/0x70 [rbd] > /proc/29744/stack-[<ffffffffa0126a2e>] do_watch_error+0x2e/0x40 [libceph] > /proc/29744/stack-[<ffffffff8111d935>] process_one_work+0x145/0x3c0 > /proc/29744/stack-[<ffffffff8111dbfa>] worker_thread+0x4a/0x470 > /proc/29744/stack-[<ffffffff8111dbb0>] worker_thread+0x0/0x470 > /proc/29744/stack-[<ffffffff81122e4d>] kthread+0xbd/0xe0 > /proc/29744/stack-[<ffffffff8181717f>] ret_from_fork+0x1f/0x40 > /proc/29744/stack-[<ffffffff81122d90>] kthread+0x0/0xe0 > /proc/29744/stack-[<ffffffffffffffff>] 0xffffffffffffffff > -- > /proc/3426/stack-[<ffffffff8115ea31>] try_to_del_timer_sync+0x41/0x60 > /proc/3426/stack-[<ffffffff8115ea94>] del_timer_sync+0x44/0x50 > /proc/3426/stack-[<ffffffff8112c1c0>] default_wake_function+0x0/0x10 > /proc/3426/stack-[<ffffffff8111b35f>] flush_workqueue+0x12f/0x540 > /proc/3426/stack:[<ffffffffa015376b>] do_rbd_remove.isra.25+0xfb/0x190 [rbd] > /proc/3426/stack-[<ffffffff812b7f3a>] kernfs_fop_write+0x10a/0x190 > /proc/3426/stack-[<ffffffff8124dc63>] __vfs_write+0x23/0x120 > /proc/3426/stack-[<ffffffff8124e8f3>] vfs_write+0xb3/0x1a0 > /proc/3426/stack-[<ffffffff8124fbd2>] SyS_write+0x42/0xa0 > /proc/3426/stack-[<ffffffff81816f72>] entry_SYSCALL_64_fastpath+0x1a/0xa4 > /proc/3426/stack-[<ffffffffffffffff>] 0xffffffffffffffff > > # ps aux | egrep '(14109|29744|3426)' > root 3426 0.0 0.0 181256 10488 ? Dl Jul06 0:00 rbd > unmap /dev/rbd0 > root 14109 0.0 0.0 246704 10228 ? Sl Jul03 0:01 rbd > map --pool XXXX XXXXXXX > root 29744 0.0 0.0 0 0 ? D Jul05 0:00 [kworker/u16:2]
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