Message-ID: <4BBB61AF.6000608@redhat.com>
Date: Tue, 06 Apr 2010 19:30:39 +0300
From: Avi Kivity <avi@redhat.com>
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To: Andrew Morton <akpm@linux-foundation.org>
CC: Jeremy Fitzhardinge <jeremy@goop.org>, Dmitry Torokhov <dtor@vmware.com>,
       linux-kernel@vger.kernel.org, pv-drivers@vmware.com,
       Dan Magenheimer <dan.magenheimer@oracle.com>
Subject: Re: [PATCH] VMware Balloon driver
References: <20100404215202.GA13020@dtor-ws.eng.vmware.com>	<20100405142419.2c9bea3d.akpm@linux-foundation.org>	<4BBA5E1C.10706@goop.org>	<20100405151720.8a6ac5e3.akpm@linux-foundation.org>	<4BBA7226.9080508@goop.org> <20100405163458.135fa319.akpm@linux-foundation.org>
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On 04/06/2010 02:34 AM, Andrew Morton wrote:
> On Mon, 05 Apr 2010 16:28:38 -0700
> Jeremy Fitzhardinge<jeremy@goop.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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