RE: [Xen-devel] Re: [PATCH] Disable auto-balloon on ia64

[Alex Williamson <alex.williamson@xxxxxx>]

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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