Re: [Xen-devel] dom0 boot failure with 256G

[Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>]

Keir Fraser wrote:
> On 5/6/08 08:24, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> wrote:
>
> > > 256GB is more than a 32b dom0 can handle. Presumably it works if you set
> > > dom0_mem= to something smaller?
> > >
> > > We should probably make the clipping of dom0 memory to something like
> > > 64GB automatic.
> > Xen ought to have crashed during dom0 build in that case, being unable to
> > allocate enough memory of the restricted address width supported by the 32b
> > dom0 guest. I agree that dom0_mem should be automatically intelligently
> > clamped. Currently nr_pages is clamped to UINT_MAX (!) for a 32b dom0, which
> > is still rather a big number.
> Actually compat guests are good for up to 128GB, so you should be fine with
> no dom0_mem= parameter.
>
>  -- Keir
No, it crashed without dom0_mem paramater after I fixed the physaddr_bitsize 
in construct_dom0(). It looked like it was allocating almost 256G to dom0... 
things are fine now with dom0_mem= specified.
thanks
mukesh



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