linux-kernel - Re: [PATCH] posix-timers: RCU conversion

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Date:	Tue, 05 Apr 2011 11:03:49 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Avi Kivity <avi@...hat.com>
Cc:	ben@...u.net, Eric Dumazet <eric.dumazet@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	KVM list <kvm@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	John Stultz <johnstul@...ibm.com>,
	Richard Cochran <richard.cochran@...cron.at>,
	Mike Galbraith <efault@....de>
Subject: Re: [PATCH] posix-timers: RCU conversion

On Tue, 2011-04-05 at 11:56 +0300, Avi Kivity wrote:
> 
> Could be waking up due to guest wakeups, or qemu internal wakeups 
> (display refresh) or due to guest timer sources which are masked away in 
> the guest (if that's the case we should optimize it away).

Right, so I guess we're all clutching at straws here :-)

Ben how usable is that system when its in that state? Could you run a
function trace or a trace with all kvm and sched trace-events enabled?


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