linux-kernel - Re: [PATCH v4] sched/fair: do not scan twice in detach

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Message-ID: <7748caaf-4f32-461a-ba32-9311c04fec63@amperemail.onmicrosoft.com>
Date: Tue, 22 Jul 2025 17:40:13 +0800
From: Shijie Huang <shijie@...eremail.onmicrosoft.com>
To: Vincent Guittot <vincent.guittot@...aro.org>,
 Valentin Schneider <vschneid@...hat.com>
Cc: Huang Shijie <shijie@...amperecomputing.com>, mingo@...hat.com,
 peterz@...radead.org, juri.lelli@...hat.com, 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
Subject: Re: [PATCH v4] sched/fair: do not scan twice in detach_tasks()


On 2025/7/22 15:53, Vincent Guittot wrote:
>>   more_balance:
>>                  rq_lock_irqsave(busiest, &rf);
>>                  update_rq_clock(busiest);
>>
>> +               if (!env.loop_max)
>> +                       env.loop_max = min(sysctl_sched_nr_migrate,
>> busiest->cfs.h_nr_runnable);
> it should be h_nr_queued as mentioned by Huang and my patch has been
> messed up by my web browser

okay, I can create a patch later, and send it out after it passes the 
Specjbb test.


Thanks

Huang Shijie