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From: Peter Zijlstra <peterz@infradead.org>
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: mingo@redhat.com, juri.lelli@redhat.com,
	dietmar.eggemann@arm.com, rostedt@goodmis.org,
	bsegall@google.com, mgorman@suse.de,
	linux-kernel@vger.kernel.org, pauld@redhat.com,
	parth@linux.ibm.com, valentin.schneider@arm.com,
	hdanton@sina.com, quentin.perret@arm.com,
	srikar@linux.vnet.ibm.com, riel@surriel.com,
	Morten.Rasmussen@arm.com
Subject: Re: [PATCH] sched/fair: fix statistics for find_idlest_group()
Date: Tue, 18 Feb 2020 16:09:37 +0100	[thread overview]
Message-ID: <20200218150937.GD14914@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200218144534.4564-1-vincent.guittot@linaro.org>

On Tue, Feb 18, 2020 at 03:45:34PM +0100, Vincent Guittot wrote:
> sgs->group_weight is not set while gathering statistics in
> update_sg_wakeup_stats(). This means that a group can be classified as
> fully busy with 0 running tasks if utilization is high enough.
> 
> This path is mainly used for fork and exec.
> 
> Fixes: 57abff067a08 ("sched/fair: Rework find_idlest_group()")
> Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>

Thanks!

  reply	other threads:[~2020-02-18 15:10 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-18 14:45 [PATCH] sched/fair: fix statistics for find_idlest_group() Vincent Guittot
2020-02-18 15:09 ` Peter Zijlstra [this message]
2020-02-27  9:12 ` [tip: sched/urgent] sched/fair: Fix " tip-bot2 for Vincent Guittot

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