RE: [Xen-devel] out-of-memory problem whenrestoringballooneddomains

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> I think the relevant part from the log is this.
> 
> xc_linux_restore start
> Could not create domain. pfns=460800, 1843200KB
> Could not create domain. pfns=460800, 1843200KB
> 4526 [INF] XFRD> Xfr service err=1

Hmm, yes. On restore we allocate the maximum amount of memory the domain
is allowed to have, and then balloon it down once the memory image has
been restored.

For a save/restore this is pretty easy to fix, but it's a little bit
awkward for migration where the domain keeps running, and could
potentially be expanding its memory requirements during the migration. 

I think we'll have to modify xc_resume to lazily allocate memory on
demand rather than the current conservative approach.

We'll look into fixing this in the unstable tree.

Ian


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