Re: [Xen-devel] Xen max supported memory per guest VM?

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 16/08/2010 10:04, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:

>>> But what's the max supported amount of memory for a (64bit) guest?
>> 
>> Allocating the whole 1TB should work. It's unlikely to have been tested
>> though.
> 
> Not everything will work with more than 512G: Anything that wants
> to access the guest's pfn_to_mfn_frame_list_list won't work, as
> there's no specification of how more than a page worth of these top
> level pointers should be expressed. Affected would be (afaict) save/
> restore/migrate, kexec, and dumping of a crashed guest.

Okay, so that's a further restriction on PV guests. HVM guests should
theoretically still be good up to 1TB.

 -- Keir



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