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From: Peter Zijlstra <peterz@infradead.org>
To: mingo@kernel.org
Cc: linux-kernel@vger.kernel.org, peterz@infradead.org,
	juri.lelli@redhat.com, vincent.guittot@linaro.org,
	dietmar.eggemann@arm.com, rostedt@goodmis.org,
	bsegall@google.com, mgorman@suse.de, vschneid@redhat.com,
	kprateek.nayak@amd.com, joshdon@google.com, tj@kernel.org,
	jakub@okonski.org
Subject: [PATCH 0/3] sched/fair: Fix cgroup::idle preemption
Date: Thu, 05 Nov 2026 17:55:25 +0100	[thread overview]
Message-ID: <20261105165525.011876858@infradead.org> (raw)

Hi!

so I finally got around to looking at this again with a fresh mind and an LLM
generated testcase. It appears to actually work now.

I'm still not convinced on the whole find_matching_se() thing; at the end of
the day we mark a subtree 'idle', which is akin to saying 'dont care', so then
actually caring about how it ends up preempting on a different level is weird
to me.

As such, I have Vincent's patch last; modified to use the new idle state as
optimization.


             reply	other threads:[~2026-11-05 17:12 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-11-05 16:55 Peter Zijlstra [this message]
2026-11-05 16:55 ` [PATCH 1/3] sched/fair: Use guard in sched_group_set_idle() Peter Zijlstra
2026-11-05 17:42   ` Kayra Cizmeci
2026-11-05 16:55 ` [PATCH 2/3] sched/fair: Make cfs_rq::idle the sum of ancestor tg::idle Peter Zijlstra
2026-11-05 19:20   ` Kayra Cizmeci
2026-11-05 16:55 ` [RFC][PATCH 3/3] sched/eevdf: Fix sched idle task group preemption Peter Zijlstra
2026-11-05 20:10   ` Kayra Cizmeci

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