linux-kernel - Looping more in detach_tasks() when RT and CFS tasks are present

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Date:   Wed, 24 Jun 2020 17:12:33 +0530
From:   Pavan Kondeti <pkondeti@...eaurora.org>
To:     Vincent Guittot <vincent.guittot@...aro.org>,
        Peter Zijlstra <peterz@...radead.org>
Cc:     LKML <linux-kernel@...r.kernel.org>, leiwen@...vell.com
Subject: Looping more in detach_tasks() when RT and CFS tasks are present

Hi Vincent/Peter,

in load_balance(), we derive env->loop_max based on rq->nr_running.
When the busiest rq has both RT and CFS tasks, we do more loops in
detach_tasks(). Is there any reason for not using
rq->cfs.h_nr_running?

Lei Wen attempted to fix this before.
https://lore.kernel.org/lkml/1376814322-7320-2-git-send-email-leiwen@marvell.com/

Thanks,
Pavan

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