On Tue, Nov 24, 2020 at 12:04:30PM -0500, Joel Fernandes wrote:
> Hi Peter,
>
> On Tue, Nov 24, 2020 at 01:04:38PM +0100, Peter Zijlstra wrote:
> > On Tue, Nov 17, 2020 at 06:19:42PM -0500, Joel Fernandes (Google) wrote:
> > > + /*
> > > + * Optimize for common case where this CPU has no cookies
Hi Peter,
On Tue, Nov 24, 2020 at 01:04:38PM +0100, Peter Zijlstra wrote:
> On Tue, Nov 17, 2020 at 06:19:42PM -0500, Joel Fernandes (Google) wrote:
> > + /*
> > +* Optimize for common case where this CPU has no cookies
> > +* and there are no cookied tasks running on siblings.
> > +
On Tue, Nov 17, 2020 at 06:19:42PM -0500, Joel Fernandes (Google) wrote:
> + /*
> + * Optimize for common case where this CPU has no cookies
> + * and there are no cookied tasks running on siblings.
> + */
> + if (!need_sync) {
> + for_each_class(class) {
> +
The core pick loop grew a lot of warts over time to support
optimizations. Turns out that that directly doing a class pick before
entering the core-wide pick is better for readability. Make the changes.
Since this is a relatively new patch, make it a separate patch so that
it is easier to revert
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