linux-kernel - Re: [patch V3 08/12] rseq: Implement time slice extension enforcement timer

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Message-ID: <b2119e7a-fd82-47ab-b0ae-87fd30a368b1@efficios.com>
Date: Fri, 31 Oct 2025 15:59:26 -0400
From: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To: Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org>
Cc: Peter Zijlstra <peterz@...radead.org>,
 "Paul E. McKenney" <paulmck@...nel.org>, Boqun Feng <boqun.feng@...il.com>,
 Jonathan Corbet <corbet@....net>,
 Prakash Sangappa <prakash.sangappa@...cle.com>,
 Madadi Vineeth Reddy <vineethr@...ux.ibm.com>,
 K Prateek Nayak <kprateek.nayak@....com>,
 Steven Rostedt <rostedt@...dmis.org>,
 Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
 Arnd Bergmann <arnd@...db.de>, linux-arch@...r.kernel.org
Subject: Re: [patch V3 08/12] rseq: Implement time slice extension enforcement
 timer

On 2025-10-29 09:22, Thomas Gleixner wrote:
> 
>     3) The function is calling into the scheduler code and that might have
>        unexpected consequences when this is invoked due to a time slice
>        enforcement expiry. Especially when the task managed to clear the
>        grant via sched_yield(0).

Do you mean sys_rseq_slice_yield here ?

> ---
> V3: Add sysctl documentation, simplify timer cancelation - Sebastian

^ cancellation

Other than those nits:

Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>

-- 
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com