Re: [Xen-devel] GPLPV memory ballooning and x32

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Sun, May 23, 2010 at 11:19:43PM -0700, Aravindh Puthiyaparambil wrote:
> Yes, I was only ballooning it down to 1G as a test. I wouldn't be doing that 
> on a production system. I am now planning to try the GPLPV driver with Xen 
> 3.4 / 4.0.
> 

Btw there are RPMs at http://gitco.de/repo/ for EL5.

-- Pasi

> Thanks,
> Aravindh
> ________________________________________
> From: James Harper [james.harper@xxxxxxxxxxxxxxxx]
> Sent: Sunday, May 23, 2010 5:33 PM
> To: Aravindh Puthiyaparambil; Keir Fraser; xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: RE: [Xen-devel] GPLPV memory ballooning and x32
> 
> >
> > Keir,
> >
> > I am running on CentOS 5.4
> > xen_major              : 3
> > xen_minor              : 1
> > xen_extra              : .2-194.3.1.el5
> >
> > I have memory=8G and maxmem=8G in my HVM config file and I am trying
> balloon
> > up and down between 1G and 8G. This works with x64 Windows. With x32 I
> see the
> > change only within Windows i.e. Free memory in task manager. Xentop
> does not
> > reflect the change. BTW, this is with the latest PV driver from James.
> 
> GPLPV will allocate the memory from Windows and try and give it to Xen,
> but as Keir has said, that doesn't work in your configuration. GPLPV
> doesn't detect this though so the memory is now basically leaked.
> 
> Additionally, I assume that you are creating an 8GB domain and
> ballooning down to 1GB as a test. I doubt it's a good idea to balloon
> that much in a production system. Windows sizes various parts of the
> system based on the amount of physical memory, and may behave badly if
> you tinker with that too much.
> 
> James
> _______________________________________________
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> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel

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