From: Dmitry Torokhov <dtor@vmware.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Avi Kivity <avi@redhat.com>,
Jeremy Fitzhardinge <jeremy@goop.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"pv-drivers@vmware.com" <pv-drivers@vmware.com>,
Dan Magenheimer <dan.magenheimer@oracle.com>
Subject: Re: [PATCH] VMware Balloon driver
Date: Mon, 5 Apr 2010 16:01:14 -0700 [thread overview]
Message-ID: <20100405230113.GB25970@dtor-ws.eng.vmware.com> (raw)
In-Reply-To: <20100405154023.c7e4f877.akpm@linux-foundation.org>
On Mon, Apr 05, 2010 at 03:40:23PM -0700, Andrew Morton wrote:
> On Tue, 06 Apr 2010 01:26:11 +0300
> Avi Kivity <avi@redhat.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?
I guess the main difference is that freeing memory is not the primary
goal; we want to make sure that guest does not use some of its memory
without notifying hypervisor first.
--
Dmitry
next prev parent reply other threads:[~2010-04-05 23:01 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-04 21:52 Dmitry Torokhov
2010-04-05 21:24 ` Andrew Morton
2010-04-05 22:03 ` Jeremy Fitzhardinge
2010-04-05 22:17 ` Andrew Morton
2010-04-05 22:26 ` Avi Kivity
2010-04-05 22:40 ` Andrew Morton
2010-04-05 23:01 ` Dmitry Torokhov [this message]
2010-04-05 23:03 ` Dan Magenheimer
2010-04-05 23:11 ` Andrew Morton
2010-04-05 23:28 ` Dmitry Torokhov
2010-04-06 16:28 ` Avi Kivity
2010-04-05 23:28 ` Jeremy Fitzhardinge
2010-04-05 23:34 ` Andrew Morton
2010-04-06 0:26 ` Dan Magenheimer
2010-04-06 16:30 ` Avi Kivity
2010-04-06 17:27 ` Dan Magenheimer
2010-04-06 23:20 ` Dave Hansen
2010-04-05 22:58 ` Dmitry Torokhov
2010-04-06 16:32 ` Avi Kivity
2010-04-06 17:06 ` Dmitry Torokhov
2010-04-06 17:42 ` Avi Kivity
2010-04-06 18:25 ` Jeremy Fitzhardinge
2010-04-06 18:36 ` Avi Kivity
2010-04-06 19:18 ` Jeremy Fitzhardinge
2010-04-08 5:30 ` Pavel Machek
2010-04-08 7:18 ` Avi Kivity
2010-04-08 17:01 ` Jeremy Fitzhardinge
2010-04-15 21:00 ` [PATCH v2] " Dmitry Torokhov
2010-04-21 19:59 ` Dmitry Torokhov
2010-04-21 20:18 ` Andrew Morton
2010-04-21 20:52 ` Dmitry Torokhov
2010-04-21 21:13 ` Andrew Morton
2010-04-22 0:09 ` Dmitry Torokhov
2010-04-21 23:54 ` Andrew Morton
2010-04-22 0:00 ` Dmitry Torokhov
2010-04-22 1:02 ` [Pv-drivers] " Dmitry Torokhov
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