linux-kernel - Re: frequent lockups in 3.18rc4

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Message-ID: <20141204034512.GA25065@redhat.com>
Date:	Wed, 3 Dec 2014 22:45:12 -0500
From:	Dave Jones <davej@...hat.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Chris Mason <clm@...com>,
	Mike Galbraith <umgwanakikbuti@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Dâniel Fraga <fragabr@...il.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	John Stultz <john.stultz@...aro.org>
Subject: Re: frequent lockups in 3.18rc4

On Wed, Dec 03, 2014 at 08:32:00PM -0500, Dave Jones wrote:
 > On Thu, Dec 04, 2014 at 01:59:01AM +0100, Thomas Gleixner wrote:
 > 
 >  > > Also, should I run it in isolation, with nothing else going on,
 >  > > or under load where I see problems ?
 >  > 
 >  > isolated is usually the best thing as it has the highest density of
 >  > reads.
 > 
 > Ok, it's been running for just over an hour with no 'fails' yet.
 > How long should I leave it ?

Ok, I left it running for four hours with no observed failures.
I'd leave it running longer, but I might not have this machine
in the new year, so I'm running out of time to complete bisections
if they take a day or two to complete each step.

	Dave

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