linux-kernel - Re: i915 X lockup

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Date:	Fri, 27 Feb 2009 11:12:25 +0100
From:	Jiri Slaby <jirislaby@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Jiri Slaby <jirislaby@...il.com>, airlied@...ux.ie,
	eric@...olt.net, keithp@...thp.com,
	dri-devel@...ts.sourceforge.net,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>
Subject: Re: i915 X lockup

On 27.2.2009 11:01, Peter Zijlstra wrote:
> would be good to have sysrq-w output

There was nothing but events. So this is rather an intel driver 
userspace bug?

SysRq : Show Blocked State
   task                        PC stack   pid father
events/1      D 0000000000000000     0    11      2
  ffff8801cb231da0 0000000000000046 ffff8801cb231d00 ffffffff80231ef8
  0000003800000010 0000000000010180 ffff880028053840 ffff880028057180
  ffff8801cb20c790 ffff8801cb20ca38 00000001ca3f90e8 00000000ffff7a0e
Call Trace:
  [<ffffffff80231ef8>] ? dequeue_entity+0x18/0x1a0
  [<ffffffff80230b50>] ? dequeue_task+0xb0/0xf0
  [<ffffffff805fca2a>] __mutex_lock_slowpath+0xea/0x170
  [<ffffffff803f60a0>] ? i915_gem_retire_work_handler+0x0/0x90
  [<ffffffff805fc6f6>] mutex_lock+0x26/0x50
  [<ffffffff803f60d8>] i915_gem_retire_work_handler+0x38/0x90
  [<ffffffff80250792>] worker_thread+0x172/0x250
  [<ffffffff80254da0>] ? autoremove_wake_function+0x0/0x40
  [<ffffffff80250620>] ? worker_thread+0x0/0x250
  [<ffffffff802549be>] kthread+0x9e/0xb0
  [<ffffffff8020d3da>] child_rip+0xa/0x20
  [<ffffffff80254920>] ? kthread+0x0/0xb0
  [<ffffffff8020d3d0>] ? child_rip+0x0/0x20
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