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SubjectRe: [PATCH v4] time/tick-sched: idle load balancing when nohz_full cpu becomes idle.
Le Thu, May 16, 2024 at 07:53:21PM +0200, Peter Zijlstra a écrit :
> On Thu, May 16, 2024 at 05:32:56PM +0200, Frederic Weisbecker wrote:
> > On Thu, May 16, 2024 at 05:19:53PM +0200, Peter Zijlstra wrote:
>
> > > Yes, but stronger, as long as the CPU is part of a load-balance domain,
> > > it must not disable the tick while running anything.
> > >
> > > that is, NOHZ_FULL must not become active unless it's running on a
> > > single CPU partition.
> >
> > I like the idea but I'm afraid to introduce regressions while doing so,
> > with people currently using nohz_full without proper partionning...
>
> There is no regression, if this is possible today it is utterly broken.
>
> This should never have been possible.

Ok, I'll try something.

Thanks.

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