linux-kernel - Re: [Qemu-devel] [RFC 3/3] virtio-balloon: add auto-ballooning support

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Message-ID: <20121222194552.55c9a97d@doriath>
Date:	Sat, 22 Dec 2012 19:45:52 -0200
From:	Luiz Capitulino <lcapitulino@...hat.com>
To:	Dietmar Maurer <dietmar@...xmox.com>
Cc:	Anton Vorontsov <anton.vorontsov@...aro.org>,
	Michal Hocko <mhocko@...e.cz>,
	"aquini@...hat.com" <aquini@...hat.com>,
	"mst@...hat.com" <mst@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	David Rientjes <rientjes@...gle.com>,
	"qemu-devel@...gnu.org" <qemu-devel@...gnu.org>,
	Glauber Costa <glommer@...allels.com>,
	Pekka Enberg <penberg@...nel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	John Stultz <john.stultz@...aro.org>,
	Mel Gorman <mgorman@...e.de>,
	"agl@...ibm.com" <agl@...ibm.com>,
	"amit.shah@...hat.com" <amit.shah@...hat.com>,
	"kirill@...temov.name" <kirill@...temov.name>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [Qemu-devel] [RFC 3/3] virtio-balloon: add auto-ballooning
 support

On Thu, 20 Dec 2012 05:24:12 +0000
Dietmar Maurer <dietmar@...xmox.com> wrote:

> > > Wow, you're fast! And I'm glad that it works for you, so we have two
> > > full-featured mempressure cgroup users already.
> > 
> > Thanks, although I think we need more testing to be sure this does what we
> > want. I mean, the basic mechanics does work, but my testing has been very
> > light so far.
> 
> Is it possible to assign different weights for different VMs, something like the vmware 'shares' setting?

This series doesn't have the "weight" concept, it has auto-balloon-level and
auto-balloon-granularity. The former allows you to choose which type of
kernel low-mem level you want auto-inflate to trigger. The latter allows you
to say by how much the balloon should grow (as a percentage of the guest's
current memory).

Both of them are per VM.
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