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Date: Tue, 17 Jul 2007 11:29:44 -0700 (PDT)
From: Jeremy Katz <jeremy.katz@windriver.com>
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To: Ingo Molnar <mingo@elte.hu>
cc: Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org,
       Andrew Morton <akpm@osdl.org>, Oleg Nesterov <oleg@tv-sign.ru>,
       Stable Team <stable@kernel.org>
Subject: Re: [PATCH] posix-timer: fix deletion race
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On Tue, 17 Jul 2007, Ingo Molnar wrote:

> nice one! The race looks pretty narrow - Jeremy, does your Xens have
> hyperthreading? (or are there any heavy SMI sources perhaps that could
> open up this race.) If not then there might be some other bug lurking in
> there as well.

Affirmative.  2 cores, 2 hyperthreading units per.