Re: [Xen-devel] 32bit xen and "claim"

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 05.11.12 at 20:16, Dan Magenheimer <dan.magenheimer@xxxxxxxxxx> wrote:
> Does it make sense to have a runtime option that unsets the
> physical limit but disallows legacy PV guests?  If this
> defaults to false for machines with RAM<=5TB but to true
> for machines with RAM>5TB, then the feature is "done"
> (AND we have put a stake in the ground to begin the
> slow obsolescence of PV functionality).

That would be interesting: Mukesh's PVH code wasn't even
posted yet, i.e. you're proposing to render systems with more
than 5Tb unbootable (for the lack of a - necessarily PV - Dom0
kernel runnable in that environment).

But yes, the plan is to extend the 1:1 mapping beyond 5Tb for
non-PV guests, and going through actual mapping code only
when acting in the context of a (64-bit) PV guest (even 32-bit
PV guests can have the full 1:1 mapping).

Jan


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