linux-kernel - Re: [PATCH] VMware Balloon driver

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Message-ID: <4BBB61AF.6000608@redhat.com>
Date:	Tue, 06 Apr 2010 19:30:39 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Jeremy Fitzhardinge <jeremy@...p.org>,
	Dmitry Torokhov <dtor@...are.com>,
	linux-kernel@...r.kernel.org, pv-drivers@...are.com,
	Dan Magenheimer <dan.magenheimer@...cle.com>
Subject: Re: [PATCH] VMware Balloon driver

On 04/06/2010 02:34 AM, Andrew Morton wrote:
> On Mon, 05 Apr 2010 16:28:38 -0700
> Jeremy Fitzhardinge<jeremy@...p.org>  wrote:
>
>    
>> And is there some way to get the vm subsystem to provide backpressure:
>> "I'm getting desperately short of memory!"?
>>      
> Not really.  One could presumably pull dopey tricks by hooking into
> slab shrinker registration or even ->writepage().  But cooking up
> something explicit doesn't sound too hard - the trickiest bit would be
> actually defining what it should do.
>    

The oft-suggested approach is to look at the I/O load from guests and 
give more memory to those that are thrashing.  Of course not all I/O is 
directly due to memory pressure.

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

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