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

KY Srinivasan
2012-11-03T14:15:21Z

> -----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.

Andrew,

I presumed this was an Ack from you with regards to exporting the
symbol. Looks like Greg is waiting to hear from you before he can check
these patches in. Could you provide an explicit Ack.

Regards,

K. Y

>
> I do wonder what relevance vm_committed_as has to processes which are
> running within a memcg container?
>
>
>