Messages in this thread | | | Date | Wed, 16 Apr 2008 22:45:00 +0200 (CEST) | From | Mikulas Patocka <> | Subject | Re: APM lockups since 2.6.25 |
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> So it didn't help, I just got this (2.6.25-rc8): > > (I have turned lockdep on few days ago, and it seems to try to release a > lock that's not held ... and then reacquire that lock again and deadlock)
BTW. the first one message happened immediatelly after APM resume, the second message 2 minutes later.
APMD didn't set time after resume, it's completely locked up.
Mikulas
> ===================================== > [ BUG: bad unlock balance detected! ] > ------------------------------------- > kapmd/1643 is trying to release lock (pm_sleep_rwsem) at: > [<c01e3a75>] device_resume+0x129/0x12e > but there are no more locks to release! > > other info that might help us debug this: > no locks held by kapmd/1643. > > stack backtrace: > Pid: 1643, comm: kapmd Not tainted 2.6.25-rc8 #5 > [<c012f877>] print_unlock_inbalance_bug+0xd7/0xe1 > [<c0241465>] ? _spin_unlock_irqrestore+0x36/0x58 > [<c012e6d5>] ? trace_hardirqs_on+0xdf/0x100 > [<c012e560>] ? mark_held_locks+0x4e/0x66 > [<c024002c>] ? mutex_lock_nested+0x1f3/0x217 > [<c012e6d5>] ? trace_hardirqs_on+0xdf/0x100 > [<c01e3a75>] ? device_resume+0x129/0x12e > [<c012fa36>] lock_release+0x90/0x132 > [<c0127f6c>] up_write+0x16/0x2a > [<c01e3a75>] device_resume+0x129/0x12e > [<c884e251>] apm+0x457/0x523 [apm] > [<c01110a1>] ? default_wake_function+0x0/0xd > [<c884ddfa>] ? apm+0x0/0x523 [apm] > [<c0124cd5>] kthread+0x39/0x5e > [<c0124c9c>] ? kthread+0x0/0x5e > [<c0102fdf>] kernel_thread_helper+0x7/0x10 > ======================= > INFO: task apmd:1813 blocked for more than 120 seconds. > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > apmd D c6cb0260 2320 1813 1 > c7b06ea8 00000046 c6cb0000 c6cb0260 c003f081 0000a086 c6d13980 > c6cb0260 > c02e724c c02e724c ffffffff c79f1b60 c02e7248 c7b06ed0 c0240e71 > c7b06ed8 > c02e724c c02e7268 c6cb0000 c7b06eec c02e7248 c79f1b60 00000000 > c7b06eec > Call Trace: > [<c0240e71>] rwsem_down_failed_common+0x122/0x140 > [<c0240eaa>] rwsem_down_write_failed+0x1b/0x23 > [<c0240f2a>] call_rwsem_down_write_failed+0x6/0x8 > [<c0240502>] ? down_write+0x3b/0x43 > [<c01e3a9f>] ? device_suspend+0x25/0x1ac > [<c01e3a9f>] device_suspend+0x25/0x1ac > [<c884d624>] suspend+0x66/0x12e [apm] > [<c884d95a>] do_ioctl+0xd3/0x14b [apm] > [<c0161588>] vfs_ioctl+0x50/0x69 > [<c01617e6>] do_vfs_ioctl+0x245/0x258 > [<c0161825>] sys_ioctl+0x2c/0x47 > [<c0102cd2>] syscall_call+0x7/0xb > ======================= > INFO: lockdep is turned off. > > Mikulas >
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