linux-kernel - Re: [PATCH] sched/deadline: Fix dl_server

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Message-ID: <aJsHNUrMdGg3rq84@jlelli-thinkpadt14gen4.remote.csb>
Date: Tue, 12 Aug 2025 11:19:49 +0200
From: Juri Lelli <juri.lelli@...hat.com>
To: Huacai Chen <chenhuacai@...ngson.cn>
Cc: Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>,
	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>,
	Huacai Chen <chenhuacai@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sched/deadline: Fix dl_server_stopped()

Hi,

On 09/08/25 21:04, Huacai Chen wrote:
> Commit cccb45d7c429 ("sched/deadline: Less agressive dl_server handling")
> introduces dl_server_stopped(). But it is obvious that dl_server_stopped()
> should return true if dl_se->dl_server_active is 0.
> 
> Fixes: cccb45d7c429 ("sched/deadline: Less agressive dl_server handling")
> Signed-off-by: Huacai Chen <chenhuacai@...ngson.cn>

This looks correct.

Acked-by: Juri Lelli <juri.lelli@...hat.com>

> ---
> I found that after commit cccb45d7c429 ("sched/deadline: Less agressive
> dl_server handling") there is always a message "sched: DL replenish lagged
> too much" after boot. Then I found this bug, but unfortunately this patch
> cannot wipe the message.

Does

https://lore.kernel.org/lkml/20250615131129.954975-1-kuyo.chang@mediatek.com/

help with the issue?

Thanks,
Juri