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Re: [PATCH v2 for-4.22? 1/7] sched: introduce specialization of "running only" vcpu_runstate_get()
- To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
- Date: Wed, 17 Jun 2026 11:58:00 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, George Dunlap <gwd@xxxxxxxxxxxxxx>
- Delivery-date: Wed, 17 Jun 2026 09:58:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 6/17/26 11:26 AM, Jan Beulich wrote:
About half the callers of vcpu_runstate_get() are solely after the
"running" time of a vCPU. Introduce a specialization with a smaller
read critical section and thus reduced risk of a need for retries.
Signed-off-by: Jan Beulich<jbeulich@xxxxxxxx>
Acked-by: Roger Pau Monné<roger.pau@xxxxxxxxxx>
Reviewed-by: Juergen Gross<jgross@xxxxxxxx>
---
Release-Acked-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
Thanks.
~ Oleksii
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