Re: [Xen-devel] pre-reservation of memory for domain creation

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 12/01/2010 15:32, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:

> Also - how did that fixed amount get determined?
> shadow_min_acceptable_pages() says 128 pages per vCPU, but 4Mb
> (1024 pages) is not matching this (given that it ought to be fine for
> 128 vCPU-s), just as the old value of 1Mb wasn't matching the
> supposed need of 32 vCPU-s.

I'm not sure I really believe the toolstack comment. As you say, it wasn't
correct before or after the patch we're talking about.

> And btw., I think that papering over a Xen crash during
> destruction of partially-created domain is rather bad a thing to do.

Depends on whether domain-creation failure at the point it failed -- and due
to inadequate pre-reservation -- is expected and allowed for by the HVM
paging logic.

 -- Keir



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