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xen-devel
RE: [Xen-devel] Re: [PATCH] Disable auto-balloon on ia64
On Mon, 2006-05-22 at 21:33 +0800, Tian, Kevin wrote:
> OK, the question by far is that ia64 describes the memory hierarchy
> presented to domain by d->max_pages. Before balloon is ready, we at
> least need to ensure all frames covered by d->max_pages allocated for
> target domain. Then there're two alternatives:
> - Keep the first piece of change on increase_reservation, which
> ensures all pages including extra spaces allocated immediately.
> - Pass the extra memory size to xen at arch_set_info_guest, and
> then change xen/ia64 to only tell domain maximum pfns as
> d->max_pages-extra_size
>
> Both need to be changed again later if balloon is ready. So I prefer to
> option I which is simpler and can help Alex to do sync quickly. How do
> you think?
I agree, I think we can get by with only the ia64 changes in the
increase_reservation call. The other option seems more fragile. Keir,
would you include the first chunk of Kevin's patch as a temporary
solution until we have better ballooning support on xen/ia64 (should be
soon)? Thanks,
Alex
--
Alex Williamson HP Linux & Open Source Lab
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