linux-kernel - Re: 2.6.32.21 - uptime related crashes?

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Message-ID: <20110721193241.GB6402@nik-comp.lan>
Date:	Thu, 21 Jul 2011 21:32:41 +0200
From:	Nikola Ciprich <nikola.ciprich@...uxbox.cz>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	john stultz <johnstul@...ibm.com>, Willy Tarreau <w@....eu>,
	MINOURA Makoto <minoura@...inux.co.jp>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Faidon Liambotis <paravoid@...ian.org>,
	linux-kernel@...r.kernel.org, stable@...nel.org,
	seto.hidetoshi@...fujitsu.com,
	Hervé Commowick <hcommowick@...sec.fr>,
	Rand@...per.es, Nikola Ciprich <nikola.ciprich@...uxbox.cz>,
	Petr Kopecký <petr.kopecky@...uxbox.cz>
Subject: Re: 2.6.32.21 - uptime related crashes?

> 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.)

Hello Ingo,

well, I guess You can add me as reporter, but this has been independently 
reported by others as well, as the bug got hit by quite a lot of people...
I'm afraid I won't add much to technical description of how this crashes the
machine apart from what has been discussed in this thread. But the reason why
this hurts us a lot is that it seems systems running RT tasks are affected in
particular, and many of our crashed machines were failover clusters running
pacemaker/corosync (which runs a lot of RT processes). And it really sucks, 
when both nodes of "high-availability" system crash in the same time :( 
So we were then forced to plan preventive restarts of some of those critical 
systems just to be sure they don't end up badly..

thanks to You all for taking a look at this!

cheers!

nik

> 
> Thanks,
> 
> 	Ingo
> 

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