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

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Message-Id: <20100405154023.c7e4f877.akpm@linux-foundation.org>
Date:	Mon, 5 Apr 2010 15:40:23 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Avi Kivity <avi@...hat.com>
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 Tue, 06 Apr 2010 01:26:11 +0300
Avi Kivity <avi@...hat.com> wrote:

> On 04/06/2010 01:17 AM, Andrew Morton wrote:
> >> The basic idea of the driver is to allow a guest system to give up
> >> memory it isn't using so it can be reused by other virtual machines (or
> >> the host itself).
> >>      
> > So...  does this differ in any fundamental way from what hibernation
> > does, via shrink_all_memory()?
> >    
> 
> Just the _all_ bit, and the fact that we need to report the freed page 
> numbers to the hypervisor.
> 

So...  why not tweak that, rather than implementing some parallel thing?
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