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

[Peter Zijlstra]

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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/