RE: [Xen-devel] PoD in other (not GPLPV) drivers

[Paul Durrant <Paul.Durrant@xxxxxxxxxx>]

I actually have plans to push it earlier because we balloon down quite late at 
the moment (off the back of the START IRP in the top level bus driver). We are 
reliant upon zero-page sweeping code in Xen to save us from guest crashing up 
to that point.

  Paul

> -----Original Message-----
> From: dunlapg@xxxxxxxxx [mailto:dunlapg@xxxxxxxxx] On Behalf Of
> George Dunlap
> Sent: 28 February 2011 11:59
> To: James Harper
> Cc: xen devel; Paul Durrant
> Subject: Re: [Xen-devel] PoD in other (not GPLPV) drivers
> 
> We tested a wide range of memory parameters for the Citrix PV
> drivers on XenServer.  I just asked the guy in charge of that, and
> he said that they were able to reliably boot w2k8x32 with
> memory=128MiB and maxmem=1024MiB.
> 
> I know we had to do make some changes to move the balloon driver
> allocation further back in the boot process to make that happen; but
> I'm not familiar with the details.  Paul would be the person to ask
> about that.
> 
>  -George
> 
> On Sun, Feb 27, 2011 at 1:47 AM, James Harper
> <james.harper@xxxxxxxxxxxxxxxx> wrote:
> > I'm looking at PoD support in GPLPV. There was a bug preventing
> the
> > initial balloon down of DomU which I've now fixed, but it's still
> a
> > bit of a race with Windows to try and balloon down the pages
> before
> > Windows tries to use them. Under Windows 2008 x32, memory=512 +
> > maxmem=1024 is enough to crash the system just after my
> DriverEntry is called.
> >
> > Do other Windows PV drivers support PoD? Under what scenarios? I'm
> > trying to figure out how achievable this is.
> >
> > Thanks
> >
> > James
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-devel
> >

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