Re: [Xen-devel] [PATCH v4 39/46] xen/sched: prepare per-cpupool scheduling granularity

[Dario Faggioli <dfaggioli@xxxxxxxx>]

On Fri, 2019-09-27 at 09:00 +0200, Juergen Gross wrote:
> On- and offlining cpus with core scheduling is rather complicated as
> the cpus are taken on- or offline one by one, but scheduling wants
> them
> rather to be handled per core.
> 
> As the future plan is to be able to select scheduling granularity per
> cpupool prepare that by storing the granularity in struct cpupool and
> struct sched_resource (we need it there for free cpus which are not
> associated to any cpupool). Free cpus will always use granularity 1.
> 
> Store the selected granularity option (cpu, core or socket) in the
> cpupool as well, as we will need it to select the appropriate cpu
> mask
> when populating the cpupool with cpus.
> 
> This will make on- and offlining of cpus much easier and avoids
> writing code which would needed to be thrown away later.
> 
> Move the granularity related variables to cpupool.c as they are now
> used form there only.
> 
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
>
Reviewed-by: Dario Faggioli <dfaggioli@xxxxxxxx>

Regards
-- 
Dario Faggioli, Ph.D
http://about.me/dario.faggioli
Virtualization Software Engineer
SUSE Labs, SUSE https://www.suse.com/
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