On Wed, Jan 17, 2018 at 9:48 AM, Roger Pau Monne <roger.pau@citrix.com> wrote:
> Since VCPUOP_{up/down} already identity pins vCPU hotplug to pCPU
> hotplug also pin the vCPUs to the pCPUs in the scheduler. This prevent
> vCPU migration and should improve performance.
>
> While there also use __cpumask_set_cpu instead of cpumask_set_cpu,
> there's no need to use the locked variant.
>
> Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>

Sorry, I just realized this -- we already have a way to pin a VM 1:1
-- d->is_pinned should do what you want here without having to
special-case the pvshim.

It seems like something like the attached might be better (compile-tested only).

 -George