I have been running 2.6.33.9-rt31 for three days now and just noticed this
message in my dmesg:
(I can't investigate it now so I decided to share the message)
============================================
[ BUG: circular locking deadlock detected! ]
--------------------------------------------
udisks-daemon/2229 is deadlocking current task hald-addon-stor/1554
1) hald-addon-stor/1554 is trying to acquire this lock:
[ffff880075b59220] {&bdev->bd_mutex}
.. ->owner: ffff88005f7ec401
.. held by: udisks-daemon: 2229 [ffff88005f7ec400, 120]
2) udisks-daemon/2229 is blocked on this lock:
[ffffffff81aafb90] {kernel_sem.lock}
INFO: lockdep is turned off.
INFO: lockdep is turned off.
udisks-daemon/2229's [blocked] stackdump:
ffff8800762cb6d8 0000000000000046 0000000000000000 ffffffff8141fc81
0000000000000000 0000000000000046 000000000000b428 ffff88005f7ec7f0
ffff880078710b80 ffff88005f7ec400 0000000000000000 0000000000000000
Call Trace:
[<ffffffff8141fc81>] ? rt_spin_lock_slowunlock+0x23/0x7d
[<ffffffff8141eb3f>] schedule+0x13/0x23
[<ffffffff8141eded>] schedule_timeout+0x36/0xed
[<ffffffff81420bb4>] ? _raw_spin_unlock_irqrestore+0x53/0x61
[<ffffffff8141fcb1>] ? rt_spin_lock_slowunlock+0x53/0x7d
[<ffffffff81074714>] ? rt_spin_lock_fastunlock.clone.11+0x2d/0x2f
[<ffffffff8141e10c>] wait_for_common+0xb1/0x10b
[<ffffffff8103c147>] ? default_wake_function+0x0/0x16
[<ffffffff814202cb>] ? rt_spin_unlock+0x2e/0x32
[<ffffffff8141e209>] wait_for_completion+0x1d/0x1f
[<ffffffff811f98fb>] blk_execute_rq+0xd3/0x108
[<ffffffff812b5702>] scsi_execute+0xf5/0x147
[<ffffffff812b57db>] scsi_execute_req+0x87/0xb9
[<ffffffff812bfdfb>] sd_revalidate_disk+0x1e8/0x16a4
[<ffffffff81074714>] ? rt_spin_lock_fastunlock.clone.11+0x2d/0x2f
[<ffffffff814202cb>] ? rt_spin_unlock+0x2e/0x32
[<ffffffff81125371>] ? __invalidate_device+0x48/0x53
[<ffffffff81120000>] ? submit_bh+0x10b/0x11a
[<ffffffff811254f9>] check_disk_change+0x52/0x5d
[<ffffffff812be48f>] sd_open+0xf9/0x1a8
[<ffffffff811262fa>] __blkdev_get+0xde/0x39d
[<ffffffff811265cb>] ? blkdev_open+0x0/0xbf
[<ffffffff811265c9>] blkdev_get+0x10/0x12
[<ffffffff8112664e>] blkdev_open+0x83/0xbf
[<ffffffff810fccc1>] __dentry_open+0x22a/0x373
[<ffffffff811e15f4>] ? devcgroup_inode_permission+0xf0/0x11d
[<ffffffff811c6598>] ? security_inode_permission+0x21/0x23
[<ffffffff810fdc83>] nameidata_to_filp+0x3f/0x50
[<ffffffff81109f0b>] do_filp_open+0x591/0xade
[<ffffffff8106ea1c>] ? lock_acquire+0xd2/0xe1
[<ffffffff8141fc81>] ? rt_spin_lock_slowunlock+0x23/0x7d
[<ffffffff81420bb4>] ? _raw_spin_unlock_irqrestore+0x53/0x61
[<ffffffff81074714>] ? rt_spin_lock_fastunlock.clone.11+0x2d/0x2f
[<ffffffff814202cb>] ? rt_spin_unlock+0x2e/0x32
[<ffffffff81113d13>] ? alloc_fd+0x10b/0x11d
[<ffffffff810fdcf8>] do_sys_open+0x64/0x119
[<ffffffff810fddcd>] sys_open+0x20/0x22
[<ffffffff81002db2>] system_call_fastpath+0x16/0x1b
hald-addon-stor/1554's [current] stackdump:
Pid: 1554, comm: hald-addon-stor Not tainted 2.6.33.9-rt31 #8
Call Trace:
[<ffffffff81074d4a>] debug_rt_mutex_print_deadlock+0x17f/0x1a6
[<ffffffff81074bfa>] ? debug_rt_mutex_print_deadlock+0x2f/0x1a6
[<ffffffff8141f64f>] __rt_mutex_slowlock.clone.10+0x86/0xc8
[<ffffffff8141f80f>] rt_mutex_slowlock+0x17e/0x23a
[<ffffffff811262a6>] ? __blkdev_get+0x8a/0x39d
[<ffffffff8141f93c>] rt_mutex_lock+0x35/0x3a
[<ffffffff8142033c>] _mutex_lock_nested+0x3a/0x41
[<ffffffff811262a6>] ? __blkdev_get+0x8a/0x39d
[<ffffffff811262a6>] __blkdev_get+0x8a/0x39d
[<ffffffff811265cb>] ? blkdev_open+0x0/0xbf
[<ffffffff811265c9>] blkdev_get+0x10/0x12
[<ffffffff8112664e>] blkdev_open+0x83/0xbf
[<ffffffff810fccc1>] __dentry_open+0x22a/0x373
[<ffffffff811e15f4>] ? devcgroup_inode_permission+0xf0/0x11d
[<ffffffff811c6598>] ? security_inode_permission+0x21/0x23
[<ffffffff810fdc83>] nameidata_to_filp+0x3f/0x50
[<ffffffff81109f0b>] do_filp_open+0x591/0xade
[<ffffffff8106ea1c>] ? lock_acquire+0xd2/0xe1
[<ffffffff8141fc81>] ? rt_spin_lock_slowunlock+0x23/0x7d
[<ffffffff81420bb4>] ? _raw_spin_unlock_irqrestore+0x53/0x61
[<ffffffff81074714>] ? rt_spin_lock_fastunlock.clone.11+0x2d/0x2f
[<ffffffff814202cb>] ? rt_spin_unlock+0x2e/0x32
[<ffffffff81113d13>] ? alloc_fd+0x10b/0x11d
[<ffffffff810fdcf8>] do_sys_open+0x64/0x119
[<ffffffff810fddcd>] sys_open+0x20/0x22
[<ffffffff81002db2>] system_call_fastpath+0x16/0x1b
INFO: lockdep is turned off.
[ turning off deadlock detection.Please report this trace. ]
Cheers,
Luis
--
[ Luis Claudio R. Goncalves Bass - Gospel - RT ]
[ Fingerprint: 4FDD B8C4 3C59 34BD 8BE9 2696 7203 D980 A448 C8F8 ]
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