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Date: Wed, 25 May 2011 22:27:21 +0200
From: Markus Trippelsdorf <markus@trippelsdorf.de>
To: linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
        Peter Zijlstra <peterz@infradead.org>
Subject: [bisected] Strange slowdowns timerfd related
Message-ID: <20110525202721.GA1738@x4.trippels.de>
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I've tested the latest git-kernel today and did experience long delays
in Firefox. Just opening a new tab would take a few seconds and after
typing a few characters into the "awesome bar" I would have to wait ages
before the results were shown.

This is the bisection result:

 commit 9ec2690758a5467f24beb301cca5098078073bba
 Author: Thomas Gleixner <tglx@linutronix.de>
 Date:   Fri May 20 16:18:50 2011 +0200

     timerfd: Manage cancelable timers in timerfd

Reverting the commit above fixes the problem.
-- 
Markus