linux-kernel - Re: workqueue panic in 3.4 kernel

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Message-ID: <20130312052426.GV14556@mtj.dyndns.org>
Date:	Mon, 11 Mar 2013 22:24:26 -0700
From:	Tejun Heo <tj@...nel.org>
To:	Lei Wen <adrian.wenl@...il.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org,
	leiwen@...vell.com, wwang27@...vell.com
Subject: Re: workqueue panic in 3.4 kernel

On Tue, Mar 12, 2013 at 01:18:01PM +0800, Lei Wen wrote:
> > You're initializing random piece of memory which may contain any
> > garbage and triggering BUG if some bit is set on it. No, you can't do
> > that. debugobj is the right tool for debugging object lifetime issues
> > and is already supported.
> 
> The debugobj is not helping on this issue, I have enabled both
> CONFIG_DEBUG_OBJECTS_WORK and CONFIG_DEBUG_OBJECTS.
> But find they didn't report any issue at all.

It should. No idea why it didn't. Would be interesting to find out
why.

> And I am not init random memory, original issue is call init multi-times
> for one structure and that piece of memory already been allocated.
> And __INIT_WORK shouldn't call over random memory, right?

Memory areas aren't always zero on allocation.

-- 
tejun
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