Messages in this thread | | | Date | Mon, 15 Jun 2015 18:00:23 -0700 | Subject | Re: [PATCH 2/4] locking/rtmutex: Use cmp-cmpxchg | From | Jason Low <> |
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On Mon, Jun 15, 2015 at 12:37 PM, Davidlohr Bueso <dave@stgolabs.net> wrote: > On Mon, 2015-06-15 at 11:34 -0700, Jason Low wrote: >> The CCAS technique was typically used in the slow paths for those >> other locks, where the chance of the operation returning false is >> higher. > > That is true. Although I really want to use it in patch 4, I guess I > could move the check in there, and thus avoid having it in the fastpath.
I agree, that way, we only have the extra check in cases where it is beneficial, like in the optimistic spin loop.
Jason
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