From: K Prateek Nayak <kprateek.nayak@amd.com>
To: "Paul E. McKenney" <paulmck@kernel.org>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>
Cc: Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Valentin Schneider <vschneid@redhat.com>,
Joel Fernandes <joelagnelf@nvidia.com>,
<linux-kernel@vger.kernel.org>, <kernel-team@meta.com>
Subject: Re: [PATCH] sched/core: Call wakeup_preempt() for queued tasks during class change
Date: Wed, 14 Oct 2026 12:07:27 +0530 [thread overview]
Message-ID: <03309616-80b8-4f7f-b6b7-79a8a14b80fa@amd.com> (raw)
In-Reply-To: <20261013152455.9039-1-kprateek.nayak@amd.com>
Hello folks,
On 10/13/2026 8:54 PM, K Prateek Nayak wrote:
> Reported-by: "Paul E. McKenney" <paulmck@kernel.org>
> Closes: https://lore.kernel.org/lkml/8fa7f795-518c-4507-b684-60b0c1cac2c5@paulmck-laptop/
> Fixes: 1e900f415c60 ("sched: Detect per-class runqueue changes")
Small correction: The above Fixes should actually be:
Fixes: 704069649b5b ("sched/core: Rework sched_class::wakeup_preempt() and rq_modified_*()")
Until then "queue_mask" was being modified at enqueue and that would
have captured the class change. Commit 704069649b5b moved to using
next_class and used the wakeup_preempt() path to set it.
--
Thanks and Regards,
Prateek
next prev parent reply other threads:[~2026-10-14 6:37 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-12 18:41 [BUG] Apparent lost wakeups Paul E. McKenney
2026-10-13 6:06 ` K Prateek Nayak
2026-10-13 6:46 ` K Prateek Nayak
2026-10-13 7:58 ` Vincent Guittot
2026-10-13 8:30 ` K Prateek Nayak
2026-10-13 8:36 ` Vincent Guittot
2026-10-13 10:14 ` Peter Zijlstra
2026-10-13 10:29 ` K Prateek Nayak
2026-10-13 10:37 ` Peter Zijlstra
2026-10-13 10:43 ` K Prateek Nayak
2026-10-13 10:06 ` Peter Zijlstra
2026-10-13 15:24 ` [PATCH] sched/core: Call wakeup_preempt() for queued tasks during class change K Prateek Nayak
2026-10-13 16:45 ` Vincent Guittot
2026-10-13 17:57 ` Paul E. McKenney
2026-10-13 19:55 ` Paul E. McKenney
2026-10-13 20:06 ` Paul E. McKenney
2026-10-14 0:13 ` Paul E. McKenney
2026-10-14 6:37 ` K Prateek Nayak [this message]
2026-10-14 10:59 ` Phil Auld
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