RE: [PATCH 1/2] mm: Export vm_committed_as

KY Srinivasan
2012-10-10T00:15:56Z

> -----Original Message-----
> From: Andrew Morton [mailto:akpm@linux-foundation.org]
> Sent: Tuesday, October 09, 2012 3:48 PM
> To: Greg KH
> Cc: KY Srinivasan; olaf@aepfle.de; linux-kernel@vger.kernel.org;
> andi@firstfloor.org; apw@canonical.com; devel@linuxdriverproject.org
> Subject: Re: [PATCH 1/2] mm: Export vm_committed_as
>
> On Mon, 8 Oct 2012 06:35:39 -0700
> Greg KH <gregkh@linuxfoundation.org> wrote:
>
> > On Mon, Oct 08, 2012 at 03:35:50AM +0000, KY Srinivasan wrote:
> > >
> > >
> > > > -----Original Message-----
> > > > From: Greg KH [mailto:gregkh@linuxfoundation.org]
> > > > Sent: Sunday, October 07, 2012 8:44 PM
> > > > To: KY Srinivasan
> > > > Cc: linux-kernel@vger.kernel.org; devel@linuxdriverproject.org;
> olaf@aepfle.de;
> > > > apw@canonical.com; akpm@linux-foundation.org; andi@firstfloor.org
> > > > Subject: Re: [PATCH 1/2] mm: Export vm_committed_as
> > > >
> > > > On Sun, Oct 07, 2012 at 04:59:45PM -0700, K. Y. Srinivasan wrote:
> > > > > The policy engine on the host expects the guest to report the
> > > > > committed_as. Since this variable is not exported,
> > > > > export this symbol.
> > > >
> > > > Why are these symbols not needed by either Xen or KVM or vmware, which
> > > > I think all support the same thing, right?
> > >
> > > The basic balloon driver does not need this symbol since the basic balloon
> driver
> > > is not automatically driven by the host. On the Windows host we have a policy
> engine that
> > > drives the balloon driver based on both guest level memory pressure that the
> guest
> > > reports as well as other system level metrics the host maintains. We need this
> symbol to
> > > drive the policy engine on the host.
> >
> > Ok, but you're going to have to get the -mm developers to agree that
> > this is ok before I can accept it.
>
> Well I guess it won't kill us.

Thanks.

K. Y