From: Thomas Gleixner <tglx@linutronix.de>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Prakash Sangappa <prakash.sangappa@oracle.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
Boqun Feng <boqun.feng@gmail.com>,
Jonathan Corbet <corbet@lwn.net>,
Madadi Vineeth Reddy <vineethr@linux.ibm.com>,
K Prateek Nayak <kprateek.nayak@amd.com>,
Steven Rostedt <rostedt@goodmis.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
Arnd Bergmann <arnd@arndb.de>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>
Subject: Re: [patch V3 00/12] rseq: Implement time slice extension mechanism
Date: Wed, 12 Nov 2025 22:54:17 +0100 [thread overview]
Message-ID: <87fraiex2u.ffs@tglx> (raw)
In-Reply-To: <3a0f1467-7fff-48c6-b0d1-772917cc6143@efficios.com>
On Wed, Nov 12 2025 at 15:46, Mathieu Desnoyers wrote:
> On 2025-11-12 15:31, Thomas Gleixner wrote:
>> I did not notice the V3 issue because tests passed on a small machine,
>> but after I did a rebase to the tip rseq and uaccess bits, I noticed the
>> failure because I tested on a larger box.
>
> Good ! We'll see if this fixes the issue observed by Prakash. If not,
> I'm curious to validate that num_possible_cpus() is always set to its
> final value before _any_ mm is created.
It _is_ set to it's final value in start_kernel() before
setup_per_cpu_areas() is invoked. Otherwise the kernel would not work at
all.
prev parent reply other threads:[~2025-11-12 21:54 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-29 13:22 [patch V3 00/12] rseq: Implement time slice extension mechanism Thomas Gleixner
2025-10-29 13:22 ` [patch V3 01/12] sched: Provide and use set_need_resched_current() Thomas Gleixner
2025-10-29 13:22 ` [patch V3 02/12] rseq: Add fields and constants for time slice extension Thomas Gleixner
2025-10-30 22:01 ` Prakash Sangappa
2025-10-31 14:32 ` Thomas Gleixner
2025-10-31 19:31 ` Mathieu Desnoyers
2025-10-31 20:58 ` Thomas Gleixner
2025-11-01 22:53 ` Thomas Gleixner
2025-11-03 17:00 ` Mathieu Desnoyers
2025-11-03 19:19 ` Florian Weimer
2025-11-04 0:20 ` Steven Rostedt
2025-10-29 13:22 ` [patch V3 03/12] rseq: Provide static branch for time slice extensions Thomas Gleixner
2025-10-29 17:23 ` Randy Dunlap
2025-10-29 21:12 ` Thomas Gleixner
2025-10-31 19:34 ` Mathieu Desnoyers
2025-10-29 13:22 ` [patch V3 04/12] rseq: Add statistics " Thomas Gleixner
2025-10-31 19:36 ` Mathieu Desnoyers
2025-10-29 13:22 ` [patch V3 05/12] rseq: Add prctl() to enable " Thomas Gleixner
2025-10-31 19:43 ` Mathieu Desnoyers
2025-10-31 21:05 ` Thomas Gleixner
2025-10-29 13:22 ` [patch V3 06/12] rseq: Implement sys_rseq_slice_yield() Thomas Gleixner
2025-10-31 19:46 ` Mathieu Desnoyers
2025-10-31 21:07 ` Thomas Gleixner
2025-11-03 17:07 ` Mathieu Desnoyers
2025-10-29 13:22 ` [patch V3 07/12] rseq: Implement syscall entry work for time slice extensions Thomas Gleixner
2025-10-31 19:53 ` Mathieu Desnoyers
2025-11-19 0:20 ` Prakash Sangappa
2025-11-19 15:25 ` Thomas Gleixner
2025-11-20 7:37 ` Prakash Sangappa
2025-11-20 11:31 ` Thomas Gleixner
2025-11-21 0:12 ` Prakash Sangappa
2025-11-26 22:02 ` Prakash Sangappa
2025-11-21 9:28 ` david laight
2025-10-29 13:22 ` [patch V3 08/12] rseq: Implement time slice extension enforcement timer Thomas Gleixner
2025-10-29 18:45 ` Steven Rostedt
2025-10-29 21:37 ` Thomas Gleixner
2025-10-29 23:53 ` Steven Rostedt
2025-10-31 19:59 ` Mathieu Desnoyers
2025-10-29 13:22 ` [patch V3 09/12] rseq: Reset slice extension when scheduled Thomas Gleixner
2025-10-31 20:03 ` Mathieu Desnoyers
2025-10-29 13:22 ` [patch V3 10/12] rseq: Implement rseq_grant_slice_extension() Thomas Gleixner
2025-10-29 20:08 ` Steven Rostedt
2025-10-29 21:46 ` Thomas Gleixner
2025-10-29 22:04 ` Steven Rostedt
2025-10-31 14:33 ` Thomas Gleixner
2025-10-29 13:22 ` [patch V3 11/12] entry: Hook up rseq time slice extension Thomas Gleixner
2025-10-29 13:22 ` [patch V3 12/12] selftests/rseq: Implement time slice extension test Thomas Gleixner
2025-10-29 15:10 ` [patch V3 00/12] rseq: Implement time slice extension mechanism Sebastian Andrzej Siewior
2025-10-29 15:40 ` Steven Rostedt
2025-10-29 21:49 ` Thomas Gleixner
2025-11-06 17:28 ` Prakash Sangappa
2025-11-10 14:23 ` Mathieu Desnoyers
2025-11-10 17:05 ` Mathieu Desnoyers
2025-11-11 16:42 ` Mathieu Desnoyers
2025-11-12 6:30 ` Prakash Sangappa
2025-11-12 20:40 ` Mathieu Desnoyers
2025-11-12 21:57 ` Thomas Gleixner
2025-11-12 23:17 ` Prakash Sangappa
2025-11-13 2:34 ` Prakash Sangappa
2025-11-13 14:38 ` Thomas Gleixner
2025-11-12 20:31 ` Thomas Gleixner
2025-11-12 20:46 ` Mathieu Desnoyers
2025-11-12 21:54 ` Thomas Gleixner [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87fraiex2u.ffs@tglx \
--to=tglx@linutronix.de \
--cc=arnd@arndb.de \
--cc=bigeasy@linutronix.de \
--cc=boqun.feng@gmail.com \
--cc=corbet@lwn.net \
--cc=kprateek.nayak@amd.com \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mathieu.desnoyers@efficios.com \
--cc=paulmck@kernel.org \
--cc=peterz@infradead.org \
--cc=prakash.sangappa@oracle.com \
--cc=rostedt@goodmis.org \
--cc=vineethr@linux.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).