Re: [Xen-devel] [PATCH v4 15/15] libxl: automatic NUMA placement affects soft affinity

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2013-11-22 at 19:58 +0100, Dario Faggioli wrote:
> vCPU soft affinity and NUMA-aware scheduling does not have
> to be related. However, soft affinity is how NUMA-aware
> scheduling is actually implemented, and therefore, by default,
> the results of automatic NUMA placement (at VM creation time)
> are also used to set the soft affinity of all the vCPUs of
> the domain.
> 
> Of course, this only happens if automatic NUMA placement is
> enabled and actually takes place (for instance, if the user
> does not specify any hard and soft affiniy in the xl config
> file).
> 
> This also takes care of the vice-versa, i.e., don't trigger
> automatic placement if the config file specifies either an
> hard (the check for which was already there) or a soft (the
> check for which is introduced by this commit) affinity.
> 
> Signed-off-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>
> Acked-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>

Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>



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