linux-kernel - Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)

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Message-ID: <20100602125811.4ae414e2@lxorguk.ukuu.org.uk>
Date:	Wed, 2 Jun 2010 12:58:11 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Arve Hjønnevåg 
	<arve@...roid.com>, "Rafael J. Wysocki" <rjw@...k.pl>,
	Florian Mickler <florian@...kler.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Alan Stern <stern@...land.harvard.edu>,
	Paul@...p1.linux-foundation.org,
	LKML <linux-kernel@...r.kernel.org>, felipe.balbi@...ia.com,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux PM <linux-pm@...ts.linux-foundation.org>
Subject: Re: [linux-pm] [PATCH 0/8] Suspend block api (version 8)

On Wed, 02 Jun 2010 11:10:51 +0200
Peter Zijlstra <peterz@...radead.org> wrote:

> On Wed, 2010-06-02 at 10:29 +0200, Thomas Gleixner wrote:
> 
> 
> > If I understood you correctly then you can shutdown the CPU in idle
> > completelty already, but that's not enough due to:
> > 
> >     1) crappy applications keeping the cpu away from idle
> >     2) timers firing
> > 
> > Would solving those two issues be sufficient for you or am I missing
> > something ?
> 
> Aren't the container snapshot/resume people fighting the same set of
> problems here?

And virtualisation - its a big one for virtualisation because if you've
got 1000 misbehaving guests generating 100 wakeups a second you've got a
problem ....

Alan
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