From: Thomas Gleixner <tglx@linutronix.de>
To: Gabriele Monaco <gmonaco@redhat.com>,
linux-kernel@vger.kernel.org,
Anna-Maria Behnsen <anna-maria@linutronix.de>,
Frederic Weisbecker <frederic@kernel.org>,
Waiman Long <longman@redhat.com>
Cc: Gabriele Monaco <gmonaco@redhat.com>,
"John B. Wyatt IV" <jwyatt@redhat.com>,
"John B. Wyatt IV" <sageofredondo@gmail.com>
Subject: Re: [PATCH v16 7/7] timers/migration: Exclude isolated cpus from hierarchy
Date: Thu, 20 Nov 2025 16:21:06 +0100 [thread overview]
Message-ID: <87ms4gk9wd.ffs@tglx> (raw)
In-Reply-To: <20251120145653.296659-8-gmonaco@redhat.com>
On Thu, Nov 20 2025 at 15:56, Gabriele Monaco wrote:
> + * This function returns false during early boot and the isolation logic is
> + * enabled only after isolated CPUs are marked as unavailable at late boot.
> + * The tick CPU can be isolated at boot, however we cannot mark it as
> + * unavailable to avoid having no global migrator for the nohz_full CPUs. This
> + * should be ensured by the callers of this function: implicitly from hotplug
> + * callbacs and explicitly in tmigr_init_isolation() and
'callbacs' is still not correct :)
Other than that:
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
next prev parent reply other threads:[~2025-11-20 15:21 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-11-20 14:56 [PATCH v16 0/7] timers/migration: Exclude isolated cpus from hierarchy Gabriele Monaco
2025-11-20 14:56 ` [PATCH v16 1/7] timers/migration: Rename 'online' bit to 'available' Gabriele Monaco
2025-11-20 19:22 ` [tip: timers/core] " tip-bot2 for Gabriele Monaco
2025-11-20 14:56 ` [PATCH v16 2/7] timers/migration: Add mask for CPUs available in the hierarchy Gabriele Monaco
2025-11-20 19:22 ` [tip: timers/core] " tip-bot2 for Gabriele Monaco
2025-11-20 14:56 ` [PATCH v16 3/7] timers/migration: Use scoped_guard on available flag set/clear Gabriele Monaco
2025-11-20 19:22 ` [tip: timers/core] " tip-bot2 for Gabriele Monaco
2025-11-20 14:56 ` [PATCH v16 4/7] cgroup/cpuset: Rename update_unbound_workqueue_cpumask() to update_isolation_cpumasks() Gabriele Monaco
2025-11-20 19:22 ` [tip: timers/core] " tip-bot2 for Gabriele Monaco
2025-11-20 14:56 ` [PATCH v16 5/7] sched/isolation: Force housekeeping if isolcpus and nohz_full don't leave any Gabriele Monaco
2025-11-20 19:22 ` [tip: timers/core] " tip-bot2 for Gabriele Monaco
2025-11-20 14:56 ` [PATCH v16 6/7] cpumask: Add initialiser to use cleanup helpers Gabriele Monaco
2025-11-20 19:22 ` [tip: timers/core] " tip-bot2 for Yury Norov
2025-11-20 14:56 ` [PATCH v16 7/7] timers/migration: Exclude isolated cpus from hierarchy Gabriele Monaco
2025-11-20 15:21 ` Thomas Gleixner [this message]
2025-11-20 15:23 ` Gabriele Monaco
2025-11-20 15:34 ` Thomas Gleixner
2025-11-20 16:12 ` Frederic Weisbecker
2025-11-20 19:18 ` Thomas Gleixner
2025-11-20 19:22 ` [tip: timers/core] " tip-bot2 for Gabriele Monaco
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