linux-kernel - Re: [stable] 2.6.32.21 - uptime related crashes?

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Message-ID: <20110830223829.GB17450@kroah.com>
Date:	Tue, 30 Aug 2011 15:38:29 -0700
From:	Greg KH <greg@...ah.com>
To:	Faidon Liambotis <paravoid@...ian.org>
Cc:	linux-kernel@...r.kernel.org, seto.hidetoshi@...fujitsu.com,
	Peter Zijlstra <peterz@...radead.org>,
	MINOURA Makoto <minoura@...inux.co.jp>,
	Ingo Molnar <mingo@...e.hu>, stable@...nel.org,
	Hervé Commowick <hcommowick@...sec.fr>,
	john stultz <johnstul@...ibm.com>, Rand@...per.es,
	Andrew Morton <akpm@...ux-foundation.org>,
	Willy Tarreau <w@....eu>
Subject: Re: [stable] 2.6.32.21 - uptime related crashes?

On Thu, Aug 25, 2011 at 09:56:16PM +0300, Faidon Liambotis wrote:
> On Thu, Jul 21, 2011 at 08:45:25PM +0200, Ingo Molnar wrote:
> > * Peter Zijlstra <peterz@...radead.org> wrote:
> > 
> > > On Thu, 2011-07-21 at 14:50 +0200, Nikola Ciprich wrote:
> > > > thanks for the patch! I'll put this on our testing boxes...
> > > 
> > > With a patch that frobs the starting value close to overflowing I hope,
> > > otherwise we'll not hear from you in like 7 months ;-)
> > > 
> > > > Are You going to push this upstream so we can ask Greg to push this to
> > > > -stable? 
> > > 
> > > Yeah, I think we want to commit this with a -stable tag, Ingo?
> > 
> > yeah - and we also want a Reported-by tag and an explanation of how 
> > it can crash and why it matters in practice. I can then stick it into 
> > the urgent branch for Linus. (probably will only hit upstream in the 
> > merge window though.)
> 
> Has this been pushed or has the problem been solved somehow? Time is
> against us on this bug as more boxes will crash as they reach 200 days
> of uptime...
> 
> In any case, feel free to use me as a Reported-by, my full report of the
> problem being <20110430173905.GA25641@....gr>.
> 
> FWIW and if I understand correctly, my symptoms were caused by *two*
> different bugs:
> a) the 54 bits wraparound at 208 days that Peter fixed above,
> b) a kernel crash at ~215 days related to RT tasks, fixed by
> 305e6835e05513406fa12820e40e4a8ecb63743c (already in -stable).

So, what do I do here as part of the .32-longterm kernel?  Is there a
fix that is in Linus's tree that I need to apply here?

confused,

greg k-h
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