From: Lai Jiangshan <laijs@cn.fujitsu.com>
To: Valdis.Kletnieks@vt.edu
Cc: Andrew Morton <akpm@linux-foundation.org>,
jkosina@suse.cz, gregkh@suse.de, linux-kernel@vger.kernel.org,
Oleg Nesterov <oleg@tv-sign.ru>,
Oliver Neukum <oliver@neukum.org>
Subject: Re: 29-rc-mmotm - HID/USB wedge w/ WARNING: at kernel/workqueue.c:371
Date: Wed, 18 Mar 2009 10:29:40 +0800 [thread overview]
Message-ID: <49C05C94.7030104@cn.fujitsu.com> (raw)
In-Reply-To: <37742.1237327272@turing-police.cc.vt.edu>
Valdis.Kletnieks@vt.edu wrote:
> On Tue, 17 Mar 2009 13:54:24 PDT, Andrew Morton said:
>
>> It's an error in workqueue-avoid-recursion-in-run_workqueue.patch, methinks.
>
> Thanks for the diagnosis - I got as far as realizing that any backtrace that
> included flush_cpu_workqueue() and worker_thread() had a problem and got
> stuck there.
>
It's dangerous when we allow recursion in run_workqueue().
If it's hard for you avoid flush_scheduled_work() in
keventd's work fuction by other fix, you can create
another workqueue to handle your works, IMO.
Thanks
Lai jiangshan
next prev parent reply other threads:[~2009-03-18 2:31 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-17 6:33 29-rc-mmotm - HID/USB wedge w/ WARNING: at kernel/workqueue.c:371 Valdis.Kletnieks
2009-03-17 14:58 ` Alan Cox
2009-03-17 15:07 ` Oliver Neukum
2009-03-17 16:55 ` Valdis.Kletnieks
2009-03-17 20:53 ` Greg KH
2009-03-17 23:48 ` Valdis.Kletnieks
2009-03-17 20:54 ` Andrew Morton
2009-03-17 22:01 ` Valdis.Kletnieks
2009-03-18 2:29 ` Lai Jiangshan [this message]
2009-03-18 2:50 ` Andrew Morton
2009-03-18 3:26 ` Lai Jiangshan
2009-03-18 7:48 ` Oliver Neukum
2009-03-20 13:42 ` Valdis.Kletnieks
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