linux-kernel - Re: [PATCH v2 06/10] sched/fair: delete superfluous SKIP_AGE

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Message-ID: <71c7d48c-8ce8-9d43-d578-2a3c15dbd64b@arm.com>
Date:   Thu, 14 Jul 2022 14:33:04 +0200
From:   Dietmar Eggemann <dietmar.eggemann@....com>
To:     Chengming Zhou <zhouchengming@...edance.com>, mingo@...hat.com,
        peterz@...radead.org, vincent.guittot@...aro.org,
        rostedt@...dmis.org, bsegall@...gle.com, vschneid@...hat.com
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 06/10] sched/fair: delete superfluous SKIP_AGE_LOAD

On 13/07/2022 06:04, Chengming Zhou wrote:
> There are three types of attach_entity_cfs_rq():
> 
> 1. task migrate to CPU
> 2. task move to cgroup
> 3. task switched to fair from !fair
> 
> The case1 and case2 already have sched_avg last_update_time
> reset to 0 when attach_entity_cfs_rq().
> 
> We will make case3 also have last_update_time reset to 0 when
> attach_entity_cfs_rq() in the following patches.
> 
> So it makes no difference whether SKIP_AGE_LOAD is set or not.

Wouldn't this patch make more sense after 09/10?

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