linux-kernel - Re: [PATCH v2 4/4] sched/fair: Remove sysctl_sched_migration

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Message-ID: <20211015174241.GJ174703@worktop.programming.kicks-ass.net>
Date:   Fri, 15 Oct 2021 19:42:41 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Vincent Guittot <vincent.guittot@...aro.org>
Cc:     mingo@...hat.com, juri.lelli@...hat.com, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, linux-kernel@...r.kernel.org,
        tim.c.chen@...ux.intel.com
Subject: Re: [PATCH v2 4/4] sched/fair: Remove sysctl_sched_migration_cost
 condition

On Fri, Oct 15, 2021 at 02:46:54PM +0200, Vincent Guittot wrote:
> With a default value of 500us, sysctl_sched_migration_cost is
> significanlty higher than the cost of load_balance. Remove the
> condition and rely on the sd->max_newidle_lb_cost to abort
> newidle_balance.
> 
> Suggested-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> Signed-off-by: Vincent Guittot <vincent.guittot@...aro.org>

This is separate and not folded in for ease of bisection?