Re: [PATCH 2/5] sched: add WF_CURRENT_CPU and externise ttwu

[Kees Cook]

On October 19, 2022 6:10:45 PM PDT, Andrei Vagin <avagin@xxxxxxxxx> wrote:
>From: Peter Oskolkov <posk@xxxxxxxxxx>
>
>Add WF_CURRENT_CPU wake flag that advices the scheduler to
>move the wakee to the current CPU. This is useful for fast on-CPU
>context switching use cases such as UMCG.

UMCG is https://lwn.net/Articles/879398/ ?

>In addition, make ttwu external rather than static so that
>the flag could be passed to it from outside of sched/core.c.
>
>Signed-off-by: Peter Oskolkov <posk@xxxxxxxxxx>
>Signed-off-by: Andrei Vagin <avagin@xxxxxxxxx>
>---
> kernel/sched/core.c  |  3 +--
> kernel/sched/fair.c  |  4 ++++
> kernel/sched/sched.h | 13 ++++++++-----
> 3 files changed, 13 insertions(+), 7 deletions(-)

This would need an Ack from the sched maintainers...


-- 
Kees Cook