linux-kernel - Re: [PATCH v4 1/2] sched/fair: set rq->idle_stamp at the end of the sched_balance

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Message-ID: <20251128093129.GD3245006@noisy.programming.kicks-ass.net>
Date: Fri, 28 Nov 2025 10:31:29 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Huang Shijie <shijie@...amperecomputing.com>
Cc: mingo@...hat.com, juri.lelli@...hat.com, vincent.guittot@...aro.org,
	patches@...erecomputing.com, cl@...ux.com,
	Shubhang@...amperecomputing.com, dietmar.eggemann@....com,
	rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
	linux-kernel@...r.kernel.org, vschneid@...hat.com,
	vineethr@...ux.ibm.com, kprateek.nayak@....com
Subject: Re: [PATCH v4 1/2] sched/fair: set rq->idle_stamp at the end of the
 sched_balance_newidle

On Fri, Nov 28, 2025 at 03:54:53PM +0800, Huang Shijie wrote:
> Save the idle_stamp at the beginning of sched_balance_newidle(),
> if it cannot pull any task, set it for rq->idle_stamp.
> 

This changelog tells me what the patch does, something I can see from
reading the patch itself. However, it completely fails at the purpose of
a changelog, which is to elucidate the reader as to the reasons for
doing so.