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

[Tim Deegan <Tim.Deegan@xxxxxxxxxx>]

At 11:21 +0000 on 09 Feb (1265714487), Jan Beulich wrote:
> The Xen crash was what Keir talked about; I was referring to the
> increased early allocation which continues to be out of sync with the
> ballooning happening in the tools (and hence in environments where
> ballooning is being used likely has no chance of succeeding).

OK; the early allocation, for a domain with no vcpus and no RAM, is a
constant 4 MiB, and just needs to be added to whatever overheads are
already being taken into account (domain and vcpu structs, VMCBs, &c).

If there's a problem with allocating the RAM before the proper shadow
allocation is set up, then xend should set the shadow allocation before
it builds the guest.  Does it not already do that?

Tim.

-- 
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, XenServer Engineering
Citrix Systems UK Ltd.  (Company #02937203, SL9 0BG)

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