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

Andrew Morton
2012-10-10T01:15:05Z

On Wed, 10 Oct 2012 00:11:28 +0000 KY Srinivasan <kys@microsoft.com> wrote:

>
>
> > -----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.
>

The other part of my email seems to have vanished. Which makes me sad,
because I was rather interested in the answer.