Re: [PATCH v2 2/3] xen/sched: don't call sync_vcpu_execstate() in sched_unit_migrate_finish()

[Jan Beulich <jbeulich@xxxxxxxx>]

On 11.05.2020 13:28, Juergen Gross wrote:
> With support of core scheduling sched_unit_migrate_finish() gained a
> call of sync_vcpu_execstate() as it was believed to be called as a
> result of vcpu migration in any case.
> 
> In case of migrating a vcpu away from a physical cpu for a short period
> of time only this might not be true, so drop the call and let the lazy
> state syncing do its job.

Replying here instead of on the patch 3 thread (and I'm sorry
for mixing up function names there): By saying "for a short
period of time only", do you imply without ever getting scheduled
on the new (temporary) CPU? If so, I think I understand this
change now, but then this could do with saying here. If not, I'm
afraid I'm still lost.

Jan