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 03/12] rseq: Provide static branch for time slice extensions
Date: Mon, 27 Oct 2025 10:29:01 +0100 [thread overview]
Message-ID: <20251027092901.fm5D-9TX@linutronix.de> (raw)
In-Reply-To: <20251022121427.091502763@linutronix.de>
On 2025-10-22 14:57:32 [+0200], Thomas Gleixner wrote:
> Guard the time slice extension functionality with a static key, which can
> be disabled on the kernel command line.
>
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
> Cc: Peter Zijlstra <peterz@infradead.org>
> Cc: "Paul E. McKenney" <paulmck@kernel.org>
> Cc: Boqun Feng <boqun.feng@gmail.com>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Might want to fold:
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 6c42061ca20e5..34325cf61b8de 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -6482,6 +6482,10 @@
rootflags= [KNL] Set root filesystem mount option string
+ rseq_slice_ext= [KNL] RSEQ slice extension
+ Disable the slice extension at boot time by
+ setting it to "off". Default is "on".
+
initramfs_options= [KNL]
Specify mount options for for the initramfs mount.
Sebastian
next prev parent reply other threads:[~2025-10-27 9:29 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 [this message]
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
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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