| Date | Thu, 17 Apr 2014 17:51:15 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH v9 05/19] qspinlock: Optimize for smaller NR_CPUS |
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On Thu, Apr 17, 2014 at 11:03:57AM -0400, Waiman Long wrote: > @@ -48,6 +53,9 @@ > * We can further change the first spinner to spin on a bit in the lock word > * instead of its node; whereby avoiding the need to carry a node from lock to > * unlock, and preserving API. > + * > + * N.B. The current implementation only supports architectures that allow > + * atomic operations on smaller 8-bit and 16-bit data types. > */
Only for the _Q_PENDING_BITS == 8 case, the other case should still be fine.
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