Messages in this thread | | | Date | Tue, 14 Jul 2020 11:01:26 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 2/2] locking/pvqspinlock: Optionally store lock holder cpu into lock |
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On Mon, Jul 13, 2020 at 10:48:00PM -0400, Waiman Long wrote: > Storing the cpu number into the lock can be useful for other reason too. It > is not totally related to PPC support.
Well, the thing you did only works for 'small' (<253 CPU) systems. There's a number of Power systems that's distinctly larger than that. So it simply cannot work as anything other than a suggestion/hint. It must not be a correctness thing.
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