netdev - Re: kernel BUG at kernel/timer.c:748!

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Message-ID: <20120924153921.GA13845@redhat.com>
Date:	Mon, 24 Sep 2012 11:39:21 -0400
From:	Dave Jones <davej@...hat.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Yuchung Cheng <ycheng@...gle.com>, Julian Anastasov <ja@....bg>,
	netdev@...r.kernel.org
Subject: Re: kernel BUG at kernel/timer.c:748!

On Wed, Sep 19, 2012 at 10:02:23PM -0400, Dave Jones wrote:
 > On Thu, Sep 20, 2012 at 12:01:22AM +0200, Eric Dumazet wrote:
 > 
 >  > I spent some time trying to track this bug, but found nothing so far.
 >  > 
 >  > The timer->function are never cleared by TCP stack at tear down, and
 >  > should be set before fd is installed and can be caught by other threads.
 >  > 
 >  > Most likely its a refcounting issue...
 >  > 
 >  > Following debugging patch might trigger a bug sooner ?
 > 
 > 4 hours so far, nothing.. I'll leave it run overnight, but it doesn't seem to have
 > made much difference if any.

One of my over-weekend runs hit this again, but it didn't trigger the WARN that
your patch added :-/

	Dave

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