Messages in this thread | | | Date | Mon, 5 Apr 2010 16:01:14 -0700 | From | Dmitry Torokhov <> | 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@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
| |