linux-kernel - Re: [PATCH 4/7] sched/fair: Take care of group/affinity/sched

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Message-ID: <20250527114245.GA3578119@bytedance>
Date: Tue, 27 May 2025 19:54:41 +0800
From: Aaron Lu <ziqianlu@...edance.com>
To: K Prateek Nayak <kprateek.nayak@....com>
Cc: Peter Zijlstra <peterz@...radead.org>,
	Valentin Schneider <vschneid@...hat.com>,
	Ben Segall <bsegall@...gle.com>, Josh Don <joshdon@...gle.com>,
	Ingo Molnar <mingo@...hat.com>,
	Vincent Guittot <vincent.guittot@...aro.org>,
	Xi Wang <xii@...gle.com>, linux-kernel@...r.kernel.org,
	Juri Lelli <juri.lelli@...hat.com>,
	Dietmar Eggemann <dietmar.eggemann@....com>,
	Steven Rostedt <rostedt@...dmis.org>, Mel Gorman <mgorman@...e.de>,
	Chengming Zhou <chengming.zhou@...ux.dev>,
	Chuyi Zhou <zhouchuyi@...edance.com>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Florian Bezdeka <florian.bezdeka@...mens.com>
Subject: Re: [PATCH 4/7] sched/fair: Take care of group/affinity/sched_class
 change for throttled task

Hi Prateek,

On Tue, May 27, 2025 at 04:49:36PM +0530, K Prateek Nayak wrote:
... ...
> Since we now have an official per-task throttle indicator, what are your
> thoughts on reusing "p->se.group_node" for throttled_limbo_list?
>

I'm not sure. I can easily get confused when I see se.group_node and
thought it was something related with rq->cfs_tasks :) Maybe using a
union could make it look better?

Anyway, if space is a concern then this is a good way to do it, thanks
for the suggestion. I'll leave it to Peter to decide.

Best wishes,
Aaron