linux-kernel - Re: [v7 0/8] Reduce cross CPU IPI interference

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Message-ID: <4F2A58A1.90800@redhat.com>
Date:	Thu, 02 Feb 2012 11:34:25 +0200
From:	Avi Kivity <avi@...hat.com>
To:	paulmck@...ux.vnet.ibm.com
CC:	Christoph Lameter <cl@...ux.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Gilad Ben-Yossef <gilad@...yossef.com>,
	linux-kernel@...r.kernel.org, Chris Metcalf <cmetcalf@...era.com>,
	Frederic Weisbecker <fweisbec@...il.com>, linux-mm@...ck.org,
	Pekka Enberg <penberg@...nel.org>,
	Matt Mackall <mpm@...enic.com>,
	Sasha Levin <levinsasha928@...il.com>,
	Rik van Riel <riel@...hat.com>,
	Andi Kleen <andi@...stfloor.org>, Mel Gorman <mel@....ul.ie>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Michal Nazarewicz <mina86@...a86.com>,
	Kosaki Motohiro <kosaki.motohiro@...il.com>,
	Milton Miller <miltonm@....com>
Subject: Re: [v7 0/8] Reduce cross CPU IPI interference

On 02/01/2012 10:13 PM, Paul E. McKenney wrote:
> > 
> > Could we also apply the same approach to processors busy doing
> > computational work? In that case the OS is also not needed. Interrupting
> > these activities is impacting on performance and latency.
>
> Yep, that is in fact what Frederic's dyntick-idle userspace work does.
>

Running in a guest is a special case of running in userspace, so we'd
need to extend this work to kvm as well.

-- 
error compiling committee.c: too many arguments to function

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