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Message-ID: <69996cd3-fd1f-4844-a0ed-3abd7098db44@efficios.com> Date: Tue, 16 Dec 2025 09:59:46 -0500 From: Mathieu Desnoyers <mathieu.desnoyers@...icios.com> To: Thomas Gleixner <tglx@...utronix.de>, LKML <linux-kernel@...r.kernel.org> Cc: "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, Randy Dunlap <rdunlap@...radead.org>, Peter Zijlstra <peterz@...radead.org>, Ron Geva <rongevarg@...il.com>, Waiman Long <longman@...hat.com> Subject: Re: [patch V6 05/11] rseq: Implement sys_rseq_slice_yield() On 2025-12-15 13:24, Thomas Gleixner wrote: > Provide a new syscall which has the only purpose to yield the CPU after the > kernel granted a time slice extension. > > sched_yield() is not suitable for that because it unconditionally > schedules, but the end of the time slice extension is not required to > schedule when the task was already preempted. This also allows to have a > strict check for termination to catch user space invoking random syscalls > including sched_yield() from a time slice extension region. > Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com> -- Mathieu Desnoyers EfficiOS Inc. https://www.efficios.com
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