linux-kernel - Very high CPU values in top on idle system (3.0-rc1)

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Message-ID: <20110530173916.GA1746@x4.trippels.de>
Date:	Mon, 30 May 2011 19:39:16 +0200
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-kernel@...r.kernel.org
Subject: Very high CPU values in top on idle system (3.0-rc1)

I get very high CPU values when I run 'top' on my (mostly) idle system
with 3.0-rc1. For example mpd was always in the 1-2% range and is now
constantly over 50%. 

This is caused by:

commit 317f394160e9beb97d19a84c39b7e5eb3d7815a8
Author: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Date:   Tue Apr 5 17:23:58 2011 +0200

    sched: Move the second half of ttwu() to the remote cpu

When I revert the above I see sane CPU values again.
-- 
Markus
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