linux-kernel - Re: [PATCH] sched/deadline: fix the bug in dl_task

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Message-ID: <b7dff445-2efe-4661-982d-cc71c915db84@amperemail.onmicrosoft.com>
Date: Wed, 28 Aug 2024 16:17:12 +0800
From: Shijie Huang <shijie@...eremail.onmicrosoft.com>
To: Juri Lelli <juri.lelli@...hat.com>,
 Huang Shijie <shijie@...amperecomputing.com>
Cc: mingo@...hat.com, patches@...erecomputing.com, peterz@...radead.org,
 vincent.guittot@...aro.org, dietmar.eggemann@....com, rostedt@...dmis.org,
 bsegall@...gle.com, mgorman@...e.de, vschneid@...hat.com,
 vineeth@...byteword.org, bristot@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] sched/deadline: fix the bug in dl_task_of


On 2024/8/27 20:57, Juri Lelli wrote:
> AFAIU the fair task enqueue (the "real" one) eventually leading to this
> BUG has already had its own schedstats tracking dealt with and I don't
> think we need/want to track anything for the associated dl_server.
okay.
>
> Shouldn't we rather return early if update_stats_{wait_start,wait_end,
> enqueue_sleeper}_dl are called for a dl_server dl_se?

okay, I can add the "early return" in next version.


Thanks

Huang Shijie