[lkml]   [2009]   [Feb]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [Bug #12612] hard lockup when interrupting cdda2wav
On Wed, Feb 04, 2009 at 11:58:51AM +0100, Rafael J. Wysocki wrote:
> This message has been generated automatically as a part of a report
> of regressions introduced between 2.6.27 and 2.6.28.
> The following bug entry is on the current list of known regressions
> introduced between 2.6.27 and 2.6.28. Please verify if it still should
> be listed and let me know (either way).
> Bug-Entry :
> Subject : hard lockup when interrupting cdda2wav
> Submitter : Matthias Reichl <>
> Date : 2009-01-28 16:41 (8 days old)
> References :
> Handled-By : FUJITA Tomonori <>

This bug is still present in

so long,


[ INFO: possible recursive locking detected ] #1
swapper/0 is trying to acquire lock:
(&q->__queue_lock){.+..}, at: [<ffffffff8040e5f5>] blk_put_request+0x25/0x60

but task is already holding lock:
(&q->__queue_lock){.+..}, at: [<ffffffff8040e4da>] blk_end_io+0x5a/0xa0

other info that might help us debug this:
1 lock held by swapper/0:
#0: (&q->__queue_lock){.+..}, at: [<ffffffff8040e4da>] blk_end_io+0x5a/0xa0

stack backtrace:
Pid: 0, comm: swapper Not tainted #1
Call Trace:
<IRQ> [<ffffffff8026cc87>] __lock_acquire+0x1797/0x1930
[<ffffffff806abd7b>] error_exit+0x29/0xa9
[<ffffffff80521e20>] sg_rq_end_io+0x0/0x2e0
[<ffffffff8026ceba>] lock_acquire+0x9a/0xe0
[<ffffffff8040e5f5>] blk_put_request+0x25/0x60
[<ffffffff806ab763>] _spin_lock_irqsave+0x43/0x90
[<ffffffff8040e5f5>] blk_put_request+0x25/0x60
[<ffffffff8040e5f5>] blk_put_request+0x25/0x60
[<ffffffff80520974>] sg_finish_rem_req+0xa4/0x100
[<ffffffff80522098>] sg_rq_end_io+0x278/0x2e0
[<ffffffff8040e281>] end_that_request_last+0x61/0x260
[<ffffffff8040e4e8>] blk_end_io+0x68/0xa0
[<ffffffff80508061>] scsi_end_request+0x41/0xd0
[<ffffffff80508750>] scsi_io_completion+0x130/0x470
[<ffffffff804133e5>] blk_done_softirq+0x75/0x90
[<ffffffff802488ab>] __do_softirq+0x9b/0x180
[<ffffffff80213df3>] native_sched_clock+0x13/0x70
[<ffffffff8020d6ec>] call_softirq+0x1c/0x30
[<ffffffff8020f175>] do_softirq+0x65/0xa0
[<ffffffff80248345>] irq_exit+0xa5/0xb0
[<ffffffff8020f467>] do_IRQ+0x107/0x1d0
[<ffffffff8020c7fb>] ret_from_intr+0x0/0xf
<EOI> [<ffffffff80214ba6>] mwait_idle+0x56/0x60
[<ffffffff80214b9d>] mwait_idle+0x4d/0x60
[<ffffffff8020b353>] cpu_idle+0x63/0xc0

 \ /
  Last update: 2009-02-05 14:21    [W:0.284 / U:0.256 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site