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Re: [Xen-devel] [PATCH 08 of 10 [RFC]] xl: Introduce First Fit memory-wise placement of guests on nodes

On 03/05/12 02:03, Dario Faggioli wrote:
Actually, thinking more about this, I'm not even sure I can do what I
stated above. In fact, I don't think I can assume the number of CPUs
each node is made up of to be known, without actually checking it for
the specific node(s) I want to try using. What if some CPUs are off-line
and stuff like that?
Hmm, yeah, off-line cpus are certainly going to be an issue. If each node has an equal number of cores, we should at least be able to find a *minimum* number of nodes, and then increase it from there; then in the common case (where there are no offline cpus), we'll only have a single pass.

But I think the priority right now is getting something useable for the 4.2 release; so I think getting to a reasonable functionality quickly (i.e., with a minimum amount of effort from you) makes sense. If that means leaving it as is for the moment, that's fine. This won't be a hot path, so a little bit of inefficiency should be acceptable. We can always come back and revisit it later.


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