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SubjectRe: [PATCH v9 05/19] qspinlock: Optimize for smaller NR_CPUS
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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