linux-kernel - Re: [PATCH v5 00/14] Add a deadline server for sched

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Message-ID: <aFnR9S6XTy6ww9_o@slm.duckdns.org>
Date: Mon, 23 Jun 2025 12:15:17 -1000
From: Tejun Heo <tj@...nel.org>
To: Joel Fernandes <joelagnelf@...dia.com>
Cc: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Juri Lelli <juri.lelli@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
	Valentin Schneider <vschneid@...hat.com>,
	David Vernet <void@...ifault.com>, Andrea Righi <arighi@...dia.com>,
	Changwoo Min <changwoo@...lia.com>, bpf@...r.kernel.org
Subject: Re: [PATCH v5 00/14] Add a deadline server for sched_ext tasks

On Fri, Jun 20, 2025 at 04:32:15PM -0400, Joel Fernandes wrote:
> sched_ext tasks currently are starved by RT hoggers especially since RT
> throttling was replaced by deadline servers to boost only CFS tasks. Several
> users in the community have reported issues with RT stalling sched_ext tasks.
> Add a sched_ext deadline server as well so that sched_ext tasks are also
> boosted and do not suffer starvation.

I left some minor comments and had a question about adding @rf to
->pick_task() but the patchset generally looks great to me otherwise.

Thanks.

-- 
tejun