linux-kernel - Re: [1/6] 2.6.21-rc4: known regressions

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Date:	Fri, 23 Mar 2007 10:37:38 +0100
From:	Nick Piggin <npiggin@...e.de>
To:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Mingming Cao <cmm@...ibm.com>, Adrian Bunk <bunk@...sta.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Mariusz Kozlowski <m.kozlowski@...land.pl>,
	Oliver Pinter <oliver.pntr@...il.com>,
	Sid Boyce <g3vbv@...eyonder.co.uk>,
	Jens Axboe <jens.axboe@...cle.com>
Subject: Re: [1/6] 2.6.21-rc4: known regressions

On Fri, Mar 23, 2007 at 08:51:13AM +0100, Michal Piotrowski wrote:
> On 23/03/07, Nick Piggin <npiggin@...e.de> wrote:
> >>
> >> and that in turn points to the kernel log:
> >>
> >>       
> >http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-rc4/git-console.log
> >
> >Seems convincing. Michal, can you post your .config, and if you had
> >dynticks and hrtimers enabled, try reproducing without them?
> >
> 
> http://www.stardust.webpages.pl/files/tbf/bitis-gabonica/2.6.21-rc4/git-config
> 
> I don't know how to reproduce this bug on 2.6.21-rc4.On 2.6.21-rc2-mm1
> it was very simple, just run youtube, bash_shared_mapping etc. In fact
> I didn't see this bug for a week.

OK... for some reason this is listed as a regression against 2.6.21-rc4.

You do have CONFIG_NO_HZ=y, and it is likely to be the cause of your
2.6.21-rc2-mm1 problems, but maybe there have been fixes since then? Ingo?

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