Re: [tip: locking/urgent] futex: Optimize per-cpu reference counting

[Shrikanth Hegde]

On 11/6/25 5:10 PM, tip-bot2 for Peter Zijlstra wrote:
> The following commit has been merged into the locking/urgent branch of tip:
>
> Commit-ID:     4cb5ac2626b5704ed712ac1d46b9d89fdfc12c5d
> Gitweb:        https://git.kernel.org/tip/4cb5ac2626b5704ed712ac1d46b9d89fdfc12c5d
> Author:        Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> AuthorDate:    Wed, 16 Jul 2025 16:29:46 +02:00
> Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
> CommitterDate: Thu, 06 Nov 2025 12:30:54 +01:00
>
> futex: Optimize per-cpu reference counting
>
> Shrikanth noted that the per-cpu reference counter was still some 10%
> slower than the old immutable option (which removes the reference
> counting entirely).

Thanks for picking it up.