Re: [Xen-devel] [PATCH 0/2] xen: Switch to virtual mapped linear p2m list

[Juergen Gross]

On 10/28/2014 01:39 PM, David Vrabel wrote:
> On 28/10/14 12:07, Juergen Gross wrote:
> > Okay, back to the original question: is the (up to) 64 MB virtual
> > mapping of the p2m list on 32-bit pv domains a problem or not?
>
> I think up-to 64 MiB of vmalloc area is fine.  The vmalloc space can be
> increased with a command line option in the unlikely event that there
> are domUs that would be affected.

Okay.

> > If yes, the virtual mapped linear p2m list could still be used on
> > 64 bit domains, paving the way for support of more than 512 GB of
> > domain memory. OTOH having to keep the p2m tree coding alive isn't
> > my favorite solution...
>
> Having to keep both the tree and linear p2m code would be awful.  Let's
> not do this!

Agreed. :-)


Juergen

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