linux-kernel - Re: WARNING: at kernel/workqueue.c [was: mmotm 2011-01-06-15-41 uploaded]

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Date:	Tue, 11 Jan 2011 15:32:44 +0100
From:	Tejun Heo <tj@...nel.org>
To:	Tony Luck <tony.luck@...il.com>
Cc:	Minchan Kim <minchan.kim@...il.com>,
	Jiri Slaby <jirislaby@...il.com>, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org, mm-commits@...r.kernel.org,
	linux-next@...r.kernel.org
Subject: Re: WARNING: at kernel/workqueue.c [was: mmotm 2011-01-06-15-41
 uploaded]

On Mon, Jan 10, 2011 at 03:36:09PM -0800, Tony Luck wrote:
> > Here it is, too.
> > mmotm-01-06
> 
> Also in today's linux-next (tag: next-20110110) on ia64:
> 
> 
> ------------[ cut here ]------------
> WARNING: at kernel/workqueue.c:1202 worker_enter_idle+0x3f0/0x4a0()
> Hardware name: server rx2620
> Modules linked in:
> 
> Call Trace:
>  [<a000000100014cb0>] show_stack+0x50/0xa0
>                                 sp=e0000040600d7c30 bsp=e0000040600d0dd0
>  [<a000000100bcaa20>] dump_stack+0x30/0x50
>                                 sp=e0000040600d7e00 bsp=e0000040600d0db8
>  [<a000000100082260>] warn_slowpath_common+0xc0/0x100
>                                 sp=e0000040600d7e00 bsp=e0000040600d0d78
>  [<a0000001000822e0>] warn_slowpath_null+0x40/0x60
>                                 sp=e0000040600d7e00 bsp=e0000040600d0d50
>  [<a0000001000b0830>] worker_enter_idle+0x3f0/0x4a0
>                                 sp=e0000040600d7e00 bsp=e0000040600d0d28
>  [<a0000001000b2c80>] worker_thread+0x8c0/0x980
>                                 sp=e0000040600d7e00 bsp=e0000040600d0c28
>  [<a0000001000c08c0>] kthread+0x120/0x160
>                                 sp=e0000040600d7e00 bsp=e0000040600d0be8
>  [<a000000100012ef0>] kernel_thread_helper+0x30/0x60
>                                 sp=e0000040600d7e30 bsp=e0000040600d0bc0
>  [<a00000010000a0c0>] start_kernel_thread+0x20/0x40
>                                 sp=e0000040600d7e30 bsp=e0000040600d0bc0
> ---[ end trace 7e2fb881ec0622f8 ]---

Ah, of course, it's commit 21ec12364bb78b72ad36b94269c64b3ee31b038f
(workqueue: remove noop condition check in worker_clr_flags()).  The
condition it removes is not a noop.  Reverting it.

Thank you.

-- 
tejun
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