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xen-ia64-devel
RE: [Xen-ia64-devel] Behaviour of DOM0_GETMEMLIST ?
> is this comment correct (dom0_ops.c). I don't see where
> pages are allocated.
>
>
> /*
> * NOTE: DOM0_GETMEMLIST has somewhat different semantics
> on IA64 -
> * it actually allocates and maps pages.
> */
> case DOM0_GETMEMLIST:
> {
I think it is no longer correct. I think it was written
by Matt Chapman last summer. At that time (until Kevin
changed it recently), physical pages were allocated for
pseudo-physical pages the first time a domain accessed a
psuedo-physical address. If a domain had use of a page
but never accessed it, Xen never assigned it to the domain.
This was more flexible and better for certain future
implementations (such as memory oversubscription and
pull-based migration), but was different than the Xen/x86
implementation. So rather than make core Xen tools more
flexible, it was changed to be more like Xen/x86.
Dan
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