linux-kernel - Re: rcu_preempt running flat out on idle desktop.

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Message-ID: <20130514012105.GB12749@somewhere>
Date:	Tue, 14 May 2013 03:21:07 +0200
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Dave Jones <davej@...hat.com>, paulmck@...ux.vnet.ibm.com,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: rcu_preempt running flat out on idle desktop.

On Thu, May 09, 2013 at 05:10:26PM -0400, Dave Jones wrote:
> On Thu, May 09, 2013 at 11:02:08PM +0200, Frederic Weisbecker wrote:
> 
>  > > RCU options for this build are..
>  > >
>  > I can't reproduce that issue even with the above setting. Could you
>  > please send me your whole config?
> 
> http://paste.fedoraproject.org/11363/36813375/raw/

Sorry it took me some time to get that config booting, I ran into
other unrelated crashes.

So I'm observing the exact opposite than you: the processes appear to
have no load nor to consume cputime. Even if I use some dumb user loop.
Top don't even show it.

I'm digging further and will tell you when I get more info.

Thanks.
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