RE: [Xen-ia64-devel] [PATCH] Another important Xen/ia64 domU/vbd fix

["Magenheimer, Dan (HP Labs Fort Collins)" <dan.magenheimer@xxxxxx>]

> >If Xen requires virtual_mem_map, then dom0 will require it too.
> >Since dom0 can't work yet with virtual_mem_map, enabling it 
> in Xen is moot,
> >isn't it ?
> >
> >Tristan.

Yes, I agree.  For virtual_mem_map to work, I think domain0
needs to be given a granule of physical memory for each "island"
in the EFI memmap.

> Seems like that. If we add phys2mach (p!=m) concept into 
> dom0, that's not the issue then. ;-)

True.  But if domain0 owns all of physical memory, its not
an issue either.  The problem is that the current design
and implementation of Xen/ia64 management of physical memory
is half-way between two good solutions.  We will need to
choose one solution soon.  This should be a good discussion
at the Xen summit.

Dan

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