From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Peter Zijlstra <peterz@infradead.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
Boqun Feng <boqun.feng@gmail.com>,
Jonathan Corbet <corbet@lwn.net>,
Prakash Sangappa <prakash.sangappa@oracle.com>,
Madadi Vineeth Reddy <vineethr@linux.ibm.com>,
K Prateek Nayak <kprateek.nayak@amd.com>,
Steven Rostedt <rostedt@goodmis.org>,
Arnd Bergmann <arnd@arndb.de>,
linux-arch@vger.kernel.org
Subject: Re: [patch V2 05/12] rseq: Add prctl() to enable time slice extensions
Date: Mon, 27 Oct 2025 10:40:19 +0100 [thread overview]
Message-ID: <20251027094019.foWBPFO2@linutronix.de> (raw)
In-Reply-To: <20251022121427.216861528@linutronix.de>
On 2025-10-22 14:57:34 [+0200], Thomas Gleixner wrote:
> --- a/include/linux/rseq.h
> +++ b/include/linux/rseq.h
> @@ -164,4 +164,13 @@ void rseq_syscall(struct pt_regs *regs);
> static inline void rseq_syscall(struct pt_regs *regs) { }
> #endif /* !CONFIG_DEBUG_RSEQ */
>
> +#ifdef CONFIG_RSEQ_SLICE_EXTENSION
> +int rseq_slice_extension_prctl(unsigned long arg2, unsigned long arg3);
> +#else /* CONFIG_RSEQ_SLICE_EXTENSION */
> +static inline int rseq_slice_extension_prctl(unsigned long arg2, unsigned long arg3)
> +{
> + return -EINVAL;
This should be -ENOTSUPP as in the !rseq_slice_extension_enabled() case.
After all it is the same condition.
> +}
Sebastian
next prev parent reply other threads:[~2025-10-27 9:40 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-22 12:57 [patch V2 00/12] rseq: Implement time slice extension mechanism Thomas Gleixner
2025-10-22 12:57 ` [patch V2 01/12] sched: Provide and use set_need_resched_current() Thomas Gleixner
2025-10-27 8:59 ` Sebastian Andrzej Siewior
2025-10-27 11:13 ` Thomas Gleixner
2025-10-22 12:57 ` [patch V2 02/12] rseq: Add fields and constants for time slice extension Thomas Gleixner
2025-10-22 17:28 ` Randy Dunlap
2025-10-22 12:57 ` [patch V2 03/12] rseq: Provide static branch for time slice extensions Thomas Gleixner
2025-10-27 9:29 ` Sebastian Andrzej Siewior
2025-10-22 12:57 ` [patch V2 04/12] rseq: Add statistics " Thomas Gleixner
2025-10-22 12:57 ` [patch V2 05/12] rseq: Add prctl() to enable " Thomas Gleixner
2025-10-27 9:40 ` Sebastian Andrzej Siewior [this message]
2025-10-22 12:57 ` [patch V2 06/12] rseq: Implement sys_rseq_slice_yield() Thomas Gleixner
2025-10-22 12:57 ` [patch V2 07/12] rseq: Implement syscall entry work for time slice extensions Thomas Gleixner
2025-10-22 12:57 ` [patch V2 08/12] rseq: Implement time slice extension enforcement timer Thomas Gleixner
2025-10-27 11:38 ` Sebastian Andrzej Siewior
2025-10-27 16:26 ` Thomas Gleixner
2025-10-28 8:33 ` Sebastian Andrzej Siewior
2025-10-28 8:51 ` K Prateek Nayak
2025-10-28 9:00 ` Sebastian Andrzej Siewior
2025-10-28 9:22 ` K Prateek Nayak
2025-10-28 10:22 ` Sebastian Andrzej Siewior
2025-10-28 13:04 ` Thomas Gleixner
2025-10-22 12:57 ` [patch V2 09/12] rseq: Reset slice extension when scheduled Thomas Gleixner
2025-10-22 12:57 ` [patch V2 10/12] rseq: Implement rseq_grant_slice_extension() Thomas Gleixner
2025-10-22 12:57 ` [patch V2 11/12] entry: Hook up rseq time slice extension Thomas Gleixner
2025-10-22 12:57 ` [patch V2 12/12] selftests/rseq: Implement time slice extension test Thomas Gleixner
2025-10-27 17:30 ` [patch V2 00/12] rseq: Implement time slice extension mechanism Sebastian Andrzej Siewior
2025-10-27 18:48 ` Thomas Gleixner
2025-10-28 8:53 ` Sebastian Andrzej Siewior
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