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Date: Mon, 5 Apr 2010 16:01:14 -0700 From: Dmitry Torokhov <dtor@...are.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Avi Kivity <avi@...hat.com>, Jeremy Fitzhardinge <jeremy@...p.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "pv-drivers@...are.com" <pv-drivers@...are.com>, Dan Magenheimer <dan.magenheimer@...cle.com> Subject: Re: [PATCH] VMware Balloon driver 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@...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? 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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