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From: Valentin Schneider <valentin.schneider@arm.com>
To: Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Qais Yousef <qais.yousef@arm.com>
Cc: linux-kernel@vger.kernel.org,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@kernel.org>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Morten Rasmussen <morten.rasmussen@arm.com>,
	Quentin Perret <qperret@google.com>,
	Pavan Kondeti <pkondeti@codeaurora.org>,
	Rik van Riel <riel@surriel.com>
Subject: Re: [PATCH 7/8] sched/fair: Attempt misfit active balance when migration_type != migrate_misfit
Date: Thu, 04 Feb 2021 12:22:29 +0000	[thread overview]
Message-ID: <jhj7dno2fay.mognet@arm.com> (raw)
In-Reply-To: <aefdb891-8567-4ebc-4308-336159feb305@arm.com>

On 04/02/21 12:44, Dietmar Eggemann wrote:
> On 03/02/2021 19:43, Valentin Schneider wrote:
>> On 03/02/21 15:16, Qais Yousef wrote:
>>> On 01/28/21 18:31, Valentin Schneider wrote:
>>>> Giving group_misfit_task a higher group_classify() priority than
>>>> group_imbalance doesn't seem like the right thing to do. Instead, make
>>>> need_active_balance() return true for any migration_type when the
>>>
>>> s/need_active_balance()/voluntary_active_balance()/?
>>>
>>>> destination CPU is idle and the source CPU has a misfit task.
>>>>
>>>> While at it, add an sd_has_asym_cpucapacity() guard in
>>>> need_active_balance().
>>>
>>> ditto.
>>>
>> 
>> Myes, clearly this has been left to ferment for too long!
>
> Wasn't the migrate_misfit condition moved from
> voluntary_active_balance() into need_active_balance() by commit
> ("sched/fair: Reduce cases for active balance")?

Bah, you're right, I got confused with when I first wrote that vs when I
last updated the changelog.

As of

  e9b9734b7465 ("sched/fair: Reduce cases for active balance")e9b9734b7465

The above changelog is actually correct.

  reply	other threads:[~2021-02-04 12:23 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-28 18:31 [PATCH 0/8] sched/fair: misfit task load-balance tweaks Valentin Schneider
2021-01-28 18:31 ` [PATCH 1/8] sched/fair: Clean up active balance nr_balance_failed trickery Valentin Schneider
2021-02-03 15:14   ` Qais Yousef
2021-02-03 18:42     ` Valentin Schneider
2021-02-04 15:05       ` Qais Yousef
2021-02-05 13:51   ` Vincent Guittot
2021-02-05 14:05     ` Valentin Schneider
2021-02-05 14:34       ` Vincent Guittot
2021-01-28 18:31 ` [PATCH 2/8] sched/fair: Add more sched_asym_cpucapacity static branch checks Valentin Schneider
2021-02-03 15:14   ` Qais Yousef
2021-02-09  8:42   ` Vincent Guittot
2021-01-28 18:31 ` [PATCH 3/8] sched/fair: Tweak misfit-related capacity checks Valentin Schneider
2021-02-03 15:15   ` Qais Yousef
2021-02-03 18:42     ` Valentin Schneider
2021-02-05 14:31   ` Vincent Guittot
2021-02-05 16:59     ` Valentin Schneider
2021-02-05 17:17       ` Vincent Guittot
2021-02-05 20:07         ` Valentin Schneider
2021-02-08 15:29           ` Vincent Guittot
2021-02-08 17:49             ` Valentin Schneider
2021-01-28 18:31 ` [PATCH 4/8] sched/fair: Use dst_cpu's capacity rather than group {min, max} capacity Valentin Schneider
2021-02-03 15:15   ` Qais Yousef
2021-01-28 18:31 ` [PATCH 5/8] sched/fair: Make check_misfit_status() only compare dynamic capacities Valentin Schneider
2021-02-03 15:15   ` Qais Yousef
2021-02-04 10:49     ` Dietmar Eggemann
2021-02-04 11:34       ` Valentin Schneider
2021-02-04 14:57         ` Dietmar Eggemann
2021-01-28 18:31 ` [PATCH 6/8] sched/fair: Filter out locally-unsolvable misfit imbalances Valentin Schneider
2021-02-03 15:16   ` Qais Yousef
2021-02-03 18:43     ` Valentin Schneider
2021-01-28 18:31 ` [PATCH 7/8] sched/fair: Attempt misfit active balance when migration_type != migrate_misfit Valentin Schneider
2021-02-03 15:16   ` Qais Yousef
2021-02-03 18:43     ` Valentin Schneider
2021-02-04 11:44       ` Dietmar Eggemann
2021-02-04 12:22         ` Valentin Schneider [this message]
2021-02-09  8:58   ` Vincent Guittot
2021-02-09 18:19     ` Valentin Schneider
2021-01-28 18:31 ` [PATCH 8/8] sched/fair: Relax task_hot() for misfit tasks Valentin Schneider
2021-02-03 15:17   ` Qais Yousef
2021-02-08 16:21   ` Vincent Guittot
2021-02-08 18:24     ` Valentin Schneider
2021-02-09  8:56       ` Vincent Guittot
2021-02-03 15:14 ` [PATCH 0/8] sched/fair: misfit task load-balance tweaks Qais Yousef
2021-02-03 18:43   ` Valentin Schneider
2021-02-04 12:03     ` Dietmar Eggemann
2021-02-04 12:36       ` Valentin Schneider

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