Messages in this thread | | | Subject | Re: [PATCH] locking/osq: Drop the overload of osq lock | From | panxinhui <> | Date | Sun, 26 Jun 2016 12:59:01 +0800 |
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> 在 2016年6月26日,03:12,Peter Zijlstra <peterz@infradead.org> 写道: > > On Sun, Jun 26, 2016 at 01:27:51AM +0800, panxinhui wrote: > >> by the way I still think mutex_unlock has a big overload too. > > Do you mean overhead? > oh, maybe you are right. mutex_unlock ’s implementation uses inc_return variant on ppc, and that’s expensive. I am thinking of using cmpxchg instead.
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