linux-kernel - Re: [PATCH -rebased 07/15] sched_ext: Add a DL server for sched

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Message-ID: <20250819075714.GE3245006@noisy.programming.kicks-ass.net>
Date: Tue, 19 Aug 2025 09:57:14 +0200
From: Peter Zijlstra <peterz@...radead.org>
To: Joel Fernandes <joelagnelf@...dia.com>
Cc: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	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>, Tejun Heo <tj@...nel.org>,
	David Vernet <void@...ifault.com>, Andrea Righi <arighi@...dia.com>,
	Changwoo Min <changwoo@...lia.com>,
	Luigi De Matteis <ldematteis123@...il.com>,
	sched-ext@...ts.linux.dev
Subject: Re: [PATCH -rebased 07/15] sched_ext: Add a DL server for sched_ext
 tasks

On Sat, Aug 09, 2025 at 02:47:52PM -0400, Joel Fernandes wrote:

> --- a/kernel/sched/deadline.c
> +++ b/kernel/sched/deadline.c
> @@ -1510,7 +1510,7 @@ static void update_curr_dl_se(struct rq *rq, struct sched_dl_entity *dl_se, s64
>  	 * The fair server (sole dl_server) does not account for real-time
>  	 * workload because it is running fair work.
>  	 */
> -	if (dl_se == &rq->fair_server)
> +	if (dl_se == &rq->fair_server || dl_se == &rq->ext_server)
>  		return;

Does that want to be: if (dl_se->dl_server) ?

>