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From: Valdis.Kletnieks@vt.edu
To: Andrew Morton <akpm@linux-foundation.org>
Cc: jkosina@suse.cz, gregkh@suse.de, linux-kernel@vger.kernel.org,
	Lai Jiangshan <laijs@cn.fujitsu.com>,
	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: Tue, 17 Mar 2009 18:01:12 -0400	[thread overview]
Message-ID: <37742.1237327272@turing-police.cc.vt.edu> (raw)
In-Reply-To: Your message of "Tue, 17 Mar 2009 13:54:24 PDT." <20090317135424.9151c4f8.akpm@linux-foundation.org>

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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.

I'm going to throw some printk's into the usb_reset_device() area and related
code, and see if I can figure out why a cooling pad was able to trigger it (was
seeing a hit every 90 mins or so at home, have been up over 7 hours straight
in the office).

I'll let somebody who understands the code better figure out what should be
happening once we get into that reset situation.

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  reply	other threads:[~2009-03-17 22:02 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 [this message]
2009-03-18  2:29     ` Lai Jiangshan
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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