netdev - Re: Soft-Lockup/Race in networking in 2.6.31-rc1+195 ( possibly?caused by netem)

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Date:	Tue, 7 Jul 2009 15:29:37 +0200
From:	Jarek Poplawski <jarkao2@...il.com>
To:	Andres Freund <andres@...razel.de>
Cc:	Joao Correia <joaomiguelcorreia@...il.com>,
	Arun R Bharadwaj <arun@...ux.vnet.ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Stephen Hemminger <shemminger@...tta.com>,
	netdev@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: Soft-Lockup/Race in networking in 2.6.31-rc1+195 (
	possibly?caused by netem)

On Tue, Jul 07, 2009 at 03:22:06PM +0200, Andres Freund wrote:
> On Tuesday 07 July 2009 15:18:03 Jarek Poplawski wrote:
> > On Tue, Jul 07, 2009 at 11:40:16AM +0100, Joao Correia wrote:
> > > I am now running 2.6.31-rc2 for a couple of hours, no freeze.
> > > Let me know what/if i can help with tracking down the original source
> > > of the problem.
> > OK, so we know it's only about timers. Here is another tiny patch
> > (the previous one should be removed), which could tell (with oops) if
> > there's something while migrating. Anyway, the bug should be back :-(
> How do we know this? It still could be a race uncovered by timer migration, 
> right?

Right. But (rather) not by or in hrtimers.

> PS: You forgot the patch ;-)

Yes, I hope you got it already ;-)

Thanks,
Jarek P.
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