[PATCH 1/2] mm: Export vm_committed_as

KY Srinivasan kys at microsoft.com
Sat Nov 3 14:09:38 UTC 2012



> -----Original Message-----
> From: Andrew Morton [mailto:akpm at linux-foundation.org]
> Sent: Tuesday, October 09, 2012 3:48 PM
> To: Greg KH
> Cc: KY Srinivasan; olaf at aepfle.de; linux-kernel at vger.kernel.org;
> andi at firstfloor.org; apw at canonical.com; devel at linuxdriverproject.org
> Subject: Re: [PATCH 1/2] mm: Export vm_committed_as
> 
> On Mon, 8 Oct 2012 06:35:39 -0700
> Greg KH <gregkh at linuxfoundation.org> wrote:
> 
> > On Mon, Oct 08, 2012 at 03:35:50AM +0000, KY Srinivasan wrote:
> > >
> > >
> > > > -----Original Message-----
> > > > From: Greg KH [mailto:gregkh at linuxfoundation.org]
> > > > Sent: Sunday, October 07, 2012 8:44 PM
> > > > To: KY Srinivasan
> > > > Cc: linux-kernel at vger.kernel.org; devel at linuxdriverproject.org;
> olaf at aepfle.de;
> > > > apw at canonical.com; akpm at linux-foundation.org; andi at 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?
> 
> 
> 





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