From: Frederic Weisbecker <frederic@kernel.org>
To: Gabriele Monaco <gmonaco@redhat.com>
Cc: linux-kernel@vger.kernel.org,
Anna-Maria Behnsen <anna-maria@linutronix.de>,
Thomas Gleixner <tglx@linutronix.de>,
Waiman Long <longman@redhat.com>
Subject: Re: [PATCH v11 6/8] sched/isolation: Force housekeeping if isolcpus and nohz_full don't leave any
Date: Tue, 2 Sep 2025 14:19:35 +0200 [thread overview]
Message-ID: <aLbg1_DpQNUjsc2P@localhost.localdomain> (raw)
In-Reply-To: <20250808160142.103852-7-gmonaco@redhat.com>
Le Fri, Aug 08, 2025 at 06:01:40PM +0200, Gabriele Monaco a écrit :
> Currently the user can set up isolcpus and nohz_full in such a way that
> leaves no housekeeping CPU (i.e. no CPU that is neither domain isolated
> nor nohz full). This can be a problem for other subsystems (e.g. the
> timer wheel imgration).
>
> Prevent this configuration by invalidating the last setting in case the
> union of isolcpus (domain) and nohz_full covers all CPUs.
>
> Signed-off-by: Gabriele Monaco <gmonaco@redhat.com>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
--
Frederic Weisbecker
SUSE Labs
next prev parent reply other threads:[~2025-09-02 12:19 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-08 16:01 [PATCH v11 0/8] timers: Exclude isolated cpus from timer migration Gabriele Monaco
2025-08-08 16:01 ` [PATCH v11 1/8] timers/migration: Postpone online/offline callbacks registration to late initcall Gabriele Monaco
2025-08-08 16:01 ` [PATCH v11 2/8] timers: Rename tmigr 'online' bit to 'available' Gabriele Monaco
2025-08-08 16:01 ` [PATCH v11 3/8] timers: Add the available mask in timer migration Gabriele Monaco
2025-08-08 16:01 ` [PATCH v11 4/8] timers: Use scoped_guard when setting/clearing the tmigr available flag Gabriele Monaco
2025-08-08 16:01 ` [PATCH v11 5/8] cgroup/cpuset: Rename update_unbound_workqueue_cpumask() to update_exclusion_cpumasks() Gabriele Monaco
2025-08-08 16:01 ` [PATCH v11 6/8] sched/isolation: Force housekeeping if isolcpus and nohz_full don't leave any Gabriele Monaco
2025-08-12 15:29 ` Waiman Long
2025-09-02 12:19 ` Frederic Weisbecker [this message]
2025-08-08 16:01 ` [PATCH v11 7/8] cgroup/cpuset: Fail if isolated and nohz_full don't leave any housekeeping Gabriele Monaco
2025-08-12 15:40 ` Waiman Long
2025-08-12 16:41 ` Waiman Long
2025-08-08 16:01 ` [PATCH v11 8/8] timers: Exclude isolated cpus from timer migration Gabriele Monaco
2025-08-12 17:20 ` Waiman Long
2025-08-13 15:20 ` Gabriele Monaco
2025-09-01 12:41 ` Frederic Weisbecker
2025-09-01 13:48 ` Gabriele Monaco
2025-09-01 21:11 ` Frederic Weisbecker
2025-09-02 11:08 ` Gabriele Monaco
2025-09-02 12:45 ` Frederic Weisbecker
2025-09-08 8:35 ` Gabriele Monaco
2025-08-27 19:52 ` [PATCH v11 0/8] " John B. Wyatt IV
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=aLbg1_DpQNUjsc2P@localhost.localdomain \
--to=frederic@kernel.org \
--cc=anna-maria@linutronix.de \
--cc=gmonaco@redhat.com \
--cc=linux-kernel@vger.kernel.org \
--cc=longman@redhat.com \
--cc=tglx@linutronix.de \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.