From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ingo Molnar <mingo-X9Un+BFzKDI@public.gmane.org>
Subject: Re: [Bug #11965] regression introduced by - timers: fix
	itimer/many thread hang
Date: Sun, 23 Nov 2008 08:39:29 +0100
Message-ID: <20081123073929.GA23229@elte.hu>
References: <sBqd4qMeLzC.A.mgB.B7HKJB@chimera> <vyitTh0pP2N.A.t7C.D8HKJB@chimera>
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To: "Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org>
Cc: Linux Kernel Mailing List <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Kernel Testers List <kernel-testers-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Doug Chapman <doug.chapman-VXdhtT5mjnY@public.gmane.org>, Frank Mayhar <fmayhar-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>, Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>, Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>


* Rafael J. Wysocki <rjw-KKrjLPT3xs0@public.gmane.org> wrote:

> This message has been generated automatically as a part of a report 
> of recent regressions.
> 
> The following bug entry is on the current list of known regressions 
> from 2.6.27.  Please verify if it still should be listed and let me 
> know (either way).
> 
> 
> Bug-Entry	: http://bugzilla.kernel.org/show_bug.cgi?id=11965
> Subject		: regression introduced by - timers: fix itimer/many thread hang
> Submitter	: Doug Chapman <doug.chapman-VXdhtT5mjnY@public.gmane.org>
> Date		: 2008-11-06 11:03 (17 days old)
> First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=f06febc96ba8e0af80bcc3eaec0a109e88275fac
> References	: http://marc.info/?l=linux-kernel&m=122596943416648&w=4
> Handled-By	: Frank Mayhar <fmayhar-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
> 		  Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
> 		  Ingo Molnar <mingo-X9Un+BFzKDI@public.gmane.org>

the hang is fixed by:

  commit ad474caca3e2a0550b7ce0706527ad5ab389a4d4
  Author: Oleg Nesterov <oleg-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
  Date:   Mon Nov 10 15:39:30 2008 +0100

    fix for account_group_exec_runtime(), make sure ->signal can't be freed under rq->lock

	Ingo