linux-kernel - Re: [Bug #11965] regression introduced by - timers: fix itimer/many thread hang

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Message-ID: <20081123073929.GA23229@elte.hu>
Date:	Sun, 23 Nov 2008 08:39:29 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Doug Chapman <doug.chapman@...com>,
	Frank Mayhar <fmayhar@...gle.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [Bug #11965] regression introduced by - timers: fix
	itimer/many thread hang


* Rafael J. Wysocki <rjw@...k.pl> 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@...com>
> 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@...gle.com>
> 		  Peter Zijlstra <peterz@...radead.org>
> 		  Ingo Molnar <mingo@...e.hu>

the hang is fixed by:

  commit ad474caca3e2a0550b7ce0706527ad5ab389a4d4
  Author: Oleg Nesterov <oleg@...hat.com>
  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
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