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xen-devel
RE: [Xen-devel] [timer/ticks related] dom0 hang during boot on large 1TB
On Mon, 2010-01-04 at 22:07 +0000, Dan Magenheimer wrote:
> > From: Jan Beulich [mailto:JBeulich@xxxxxxxxxx]
> >
> > >>> Jeremy Fitzhardinge <jeremy@xxxxxxxx> 22.12.09 19:03 >>>
> > >On 12/22/2009 09:02 AM, Jan Beulich wrote:
> > >> No, that won't help. I'm referring to things like Dom0
> > accesses to the
> > >> M2P table it sees, which doesn't cover even nearly all
> > memory. I can't
> > >> say whether that can go without problem, but without
> > closely looking
> > >> at it I don't think you can assume this would work.
> > Likewise I would
> > >> suspect tools issues (if you use the tools from
> > xen-unstable et al),
> > >> though I have no precise pointer right now at specific issues.
> > >>
> > >
> > >32-bit dom0 is the standard use model for Citrix product,
> > and I think
> > >people tend to run it even with xen-unstable. Its a fairly
> > well-tested
> > >combination.
> >
> > But very unlikely with 1Tb of memory, don't you think?
> >
> > Jan
>
> Only because machines with 1TB are rare/unlikely. I can't
> speak for the Citrix product but there is NO supported
> configuration (yet) of the Oracle VM product with a 64-bit dom0.
> In other words, if a customer is using a released Oracle VM
> product and the machine on which they are running it has 1TB
> of physical memory, they ARE using a 32-bit dom0.
>
> However, Oracle VM always specifies a dom0_mem= Xen boot parameter.
> (which is always much smaller than 1TB).
So do XenServer and XCP, FWIW.
Ian.
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