linux-kernel - Re: PROBLEM: Unusually high load average when idle in 2.6.35, 2.6.35.1 and later

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Message-ID: <20101003121209.586f7b6b@schatten.dmk.lab>
Date:	Sun, 3 Oct 2010 12:12:09 +0200
From:	Florian Mickler <florian@...kler.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	tmhikaru@...il.com, linux-kernel@...r.kernel.org,
	Greg KH <gregkh@...e.de>,
	Chase Douglas <chase.douglas@...onical.com>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: PROBLEM: Unusually high load average when idle in 2.6.35,
 2.6.35.1 and later

On Sun, 03 Oct 2010 10:41:08 +0200
Peter Zijlstra <peterz@...radead.org> wrote:

> On Sat, 2010-10-02 at 23:02 -0400, tmhikaru@...il.com wrote:
> >  The load average statistic is indeed broken somehow, and I
> > did bisect it down to where the problem began, however there seems to be no
> > performance problem related to it I can find. 
> 
> Chase, anything you can see broken with this stuff?

Peter, do you think it would be worthwile to test a kernel with the
low load-averages in NOHZ=disable mode? The bisected commit claims to
fix a NOHZ issue with the load average. So if the new figures are the
correct ones, they should be somehow similar to the figures before
with NOHZ? Or am I on the wrong track here?

Regards,
Flo
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