Re: [RFC PATCH 1/2] rseq: extend struct rseq with numa node id

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Subject: Re: [RFC PATCH 1/2] rseq: extend struct rseq with numa node id
From: Florian Weimer <fw@xxxxxxxxxxxxx>
Date: Tue, 01 Feb 2022 13:07:23 +0100
Cc: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, "Paul E . McKenney" <paulmck@xxxxxxxxxx>, Boqun Feng <boqun.feng@xxxxxxxxx>, "H . Peter Anvin" <hpa@xxxxxxxxx>, Paul Turner <pjt@xxxxxxxxxx>, linux-api@xxxxxxxxxxxxxxx, Christian Brauner <christian.brauner@xxxxxxxxxx>, David.Laight@xxxxxxxxxx, carlos@xxxxxxxxxx, Peter Oskolkov <posk@xxxxxxx>
In-reply-to: <20220201110821.GV20638@worktop.programming.kicks-ass.net> (Peter Zijlstra's message of "Tue, 1 Feb 2022 12:08:21 +0100")
References: <20220131205531.17873-1-mathieu.desnoyers@efficios.com> <20220201110821.GV20638@worktop.programming.kicks-ass.net>

* Peter Zijlstra:

> On Mon, Jan 31, 2022 at 03:55:30PM -0500, Mathieu Desnoyers wrote:
>
>> It is also useful for implementing NUMA-aware user-space mutexes.
>
> That really wants a futex extention..

Do you mean with hashes per NUMA node?

References:
- [RFC PATCH 1/2] rseq: extend struct rseq with numa node id
  - From: Mathieu Desnoyers
- Re: [RFC PATCH 1/2] rseq: extend struct rseq with numa node id
  - From: Peter Zijlstra

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