Re: [RFC][PATCH 07/10] futex: Implement FUTEX2_NUMA

[Peter Zijlstra]

On Fri, Jul 14, 2023 at 03:39:06PM +0200, Peter Zijlstra wrote:
> +	/*
> +	 * Encode the futex size in the offset. This makes cross-size
> +	 * wake-wait fail -- see futex_match().
> +	 *
> +	 * NOTE that cross-size wake-wait is fundamentally broken wrt
> +	 * FLAGS_NUMA but could possibly work for !NUMA.
> +	 */
> +	key->both.offset |= FUT_OFF_SIZE * (flags & FLAGS_SIZE_MASK);

this wee bit should've gone in patch 9.