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

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Message-ID: <20100406170639.GA20948@dtor-ws.eng.vmware.com>
Date:	Tue, 6 Apr 2010 10:06:39 -0700
From:	Dmitry Torokhov <dtor@...are.com>
To:	Avi Kivity <avi@...hat.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"pv-drivers@...are.com" <pv-drivers@...are.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>
Subject: Re: [PATCH] VMware Balloon driver

On Tue, Apr 06, 2010 at 09:32:47AM -0700, Avi Kivity wrote:
> On 04/06/2010 01:58 AM, Dmitry Torokhov wrote:
> >
> >> Also please explain the applicability of this driver.  Will xen use it?
> >> kvm?  Out-of-tree code?
> >>      
> > The driver is expected to be used on VMware platform - mainly ESX.
> > Originally we tried to converge with KVM and use virtio and
> > stock virtio_balloon driver but Avi mentioned that our code emulating
> > virtqueue was more than balloon code itself and thus using virtio did
> > not make nuch sense.
> >    
> 
> Yeah.  If we wanted commonality, we could make a balloon_core.c that 
> contains the common code.  IMO that's premature, but perhaps there's 

I really not sure if it makes much sense. Ripping out virtdev/virtqueue
from virtio_balloon leaves pretty much nothing.

> some meat there (like suspend/resume support and /proc//sys interface).

We do not need any special suspend/resume support - the freezeable
workqueue is stopped when suspending.

Thanks.

-- 
Dmitry
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