From: Tejun Heo <tj@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>
Cc: David Vernet <void@manifault.com>,
Andrea Righi <andrea.righi@linux.dev>,
Changwoo Min <changwoo@igalia.com>,
linux-kernel@vger.kernel.org, sched-ext@lists.linux.dev,
Wen-Fang Liu <liuwenfang@honor.com>
Subject: Re: [PATCH 3/3] sched_ext: Allow scx_bpf_reenqueue_local() to be called from anywhere
Date: Mon, 27 Oct 2025 08:05:42 -1000 [thread overview]
Message-ID: <aP-0dkIQa7iwHv5e@slm.duckdns.org> (raw)
In-Reply-To: <20251027174953.GB3419281@noisy.programming.kicks-ass.net>
On Mon, Oct 27, 2025 at 06:49:53PM +0100, Peter Zijlstra wrote:
> > That's what I thought too and the gap between balance() and pick_task() can
> > be closed that way. However, while plugging that, I realized there's another
> > bigger gap between ttwu() and pick_task() because ttwu() can directly
> > dispatch a task into the local DSQ of a CPU. That one, there's no way to
> > close without a global hook.
>
> This would've been prime Changelog material. As is the Changelog was so
> vague I wasn't even sure it was that particular problem.
>
> Please update the changelog to be clearer.
Oh yeah, good point.
> Also, why is this patch already in a pull request to Linus? what's the
> hurry.
Hmmm? It shouldn't be. Let me check again. No, it isn't. What are you
looking at?
Thanks.
--
tejun
next prev parent reply other threads:[~2025-10-27 18:05 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-25 0:18 [PATCHSET sched_ext/for-6.19] sched_ext: Deprecate ops.cpu_acquire/release() Tejun Heo
2025-10-25 0:18 ` [PATCH 1/3] sched_ext: Split schedule_deferred() into locked and unlocked variants Tejun Heo
2025-10-25 23:17 ` Emil Tsalapatis
2025-10-25 0:18 ` [PATCH 2/3] sched_ext: Factor out reenq_local() from scx_bpf_reenqueue_local() Tejun Heo
2025-10-25 23:19 ` Emil Tsalapatis
2025-10-25 0:18 ` [PATCH 3/3] sched_ext: Allow scx_bpf_reenqueue_local() to be called from anywhere Tejun Heo
2025-10-25 23:21 ` Emil Tsalapatis
2025-10-27 9:18 ` Peter Zijlstra
2025-10-27 16:00 ` Tejun Heo
2025-10-27 17:49 ` Peter Zijlstra
2025-10-27 18:05 ` Tejun Heo [this message]
2025-10-27 18:07 ` Peter Zijlstra
2025-10-27 18:10 ` Peter Zijlstra
2025-10-27 18:17 ` Tejun Heo
2025-10-28 11:01 ` Peter Zijlstra
2025-10-28 17:07 ` Tejun Heo
2025-10-27 18:19 ` [PATCH v2 " Tejun Heo
2025-10-29 10:45 ` Peter Zijlstra
2025-10-29 15:11 ` Tejun Heo
2025-10-29 15:49 ` [PATCH v3 " Tejun Heo
2025-11-27 10:39 ` Kuba Piecuch
2025-12-02 23:05 ` Tejun Heo
2025-12-11 14:24 ` Kuba Piecuch
2025-12-11 16:17 ` Tejun Heo
2025-12-11 16:20 ` Tejun Heo
2025-12-13 1:16 ` Andrea Righi
2025-12-13 1:18 ` Tejun Heo
2025-10-29 15:31 ` [PATCHSET sched_ext/for-6.19] sched_ext: Deprecate ops.cpu_acquire/release() Tejun Heo
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