linux-kernel - Re: [PATCH] revert: timers: fix itimer/many thread hang

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Message-ID: <20081113160808.GA13726@elte.hu>
Date:	Thu, 13 Nov 2008 17:08:08 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Doug Chapman <doug.chapman@...com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Frank Mayhar <fmayhar@...gle.com>, roland@...hat.com,
	adobriyan@...il.com, akpm@...ux-foundation.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Christoph Lameter <cl@...ux-foundation.org>
Subject: Re: [PATCH] revert: timers: fix itimer/many thread hang


* Doug Chapman <doug.chapman@...com> wrote:

> Peter didn't mention here that the itimer/many thread patches cause 
> a race-condition panic which is easily reproduced (in fact 
> unavoidable with SLUB debugging on) on hyperthreaded ia64 systems 
> (but certainly possible on all systems).  Can we get this revert 
> patch pulled in?  The other attempts to fix this so far have been 
> unsuccessful.  I have tested with this revert patch and it does 
> indeed fix that issue.

Could you please try with the very latest upstream kernel? It should 
be fixed by Oleg's fix patch via:

ad474ca: fix for account_group_exec_runtime(), make sure ->signal can't be fre

which is already upstream.

	Ingo
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