Re: [RFC PATCH 11/13] sched: migration changes for core scheduling

[Joel Fernandes]

On Fri, Jun 12, 2020 at 05:32:01PM -0400, Vineeth Remanan Pillai wrote:
> > AFAIR, that's what v4 did:
> >
> >                 if (available_idle_cpu(cpu))
> > #ifdef CONFIG_SCHED_CORE
> >                         if (sched_core_enabled(cpu_rq(cpu)) &&
> >                             (p->core_cookie == cpu_rq(cpu)->core->core_cookie))
> >                                 break;
> > #else
> >                         break;
> > #endif
> >
> This patch was initially not in v4 and this is a merging of 4 patches
> suggested post-v4. During the initial round, code was like above. But since
> there looked like a code duplication in the different migration paths,
> it was consolidated into sched_core_cookie_match() and it caused this
> extra logic to this specific code path. As you mentioned, I also feel
> we do not need to check for core idleness in this path.

Ok, so I take it that you will make it so in v6 then, unless of course
someone else objects.

thanks!

- Joel