linux-kernel - Re: [PATCH] posix-timer: fix deletion race

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Message-ID: <Pine.LNX.4.63.0707181159010.3157@localhost.localdomain>
Date:	Wed, 18 Jul 2007 12:02:45 -0700 (PDT)
From:	Jeremy Katz <jeremy.katz@...driver.com>
To:	Thomas Gleixner <tglx@...utronix.de>
cc:	linux-kernel@...r.kernel.org, Andrew Morton <akpm@...l.org>,
	Ingo Molnar <mingo@...e.hu>, Oleg Nesterov <oleg@...sign.ru>,
	Stable Team <stable@...nel.org>
Subject: Re: [PATCH] posix-timer: fix deletion race

On Wed, 18 Jul 2007, Thomas Gleixner wrote:

> On Wed, 2007-07-18 at 08:05 +0200, Thomas Gleixner wrote:
>> On Tue, 2007-07-17 at 16:58 -0700, Jeremy Katz wrote:
>>
>>> EFLAGS: 00010246   (2.6.22.1-WR1.4aq_cgl #2)
>>
>> Hmm. Are there any other patches on that kernel ?

Just hrt6 and your proposed fix.  The build system I'm using appends the 
WR1.4aq_cgl, but isn't patching anything.

>> Is there a chance that you can whip up a test program which is not
>> secret sauce ?

I've taken a brief stab at it, but haven't produced anything successful 
thus far.  Unfortunately, I don't even have complete source to the test 
code, and the people that do have expressed an inability to release it due 
to contractual obligations.

>> Also can you please enable CONFIG_PROVE_LOCKING, which might catch any
>> locking problem, which might be related to this.
>
> Another test: Can you please disable CONFIG_SCHED_SMT to narrow it down
> further ?

I'll try both of these.

Jeremy
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