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From: Yuyang Du <yuyang.du@intel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: mingo@kernel.org, linux-kernel@vger.kernel.org,
	umgwanakikbuti@gmail.com, bsegall@google.com, pjt@google.com,
	morten.rasmussen@arm.com, vincent.guittot@linaro.org,
	dietmar.eggemann@arm.com
Subject: Re: [RFC PATCH 2/2] sched: Remove SD_WAKE_AFFINE flag and replace it with SD_BALANCE_WAKE
Date: Tue, 31 May 2016 09:34:19 +0800	[thread overview]
Message-ID: <20160531013419.GR18670@intel.com> (raw)
In-Reply-To: <20160531092314.GU3192@twins.programming.kicks-ass.net>

On Tue, May 31, 2016 at 11:23:14AM +0200, Peter Zijlstra wrote:
> On Tue, May 31, 2016 at 09:11:38AM +0800, Yuyang Du wrote:
> > SD_BALANCE_{FORK|EXEC|WAKE} flags are for select_task_rq() to select a
> > CPU to run a new task or a waking task. SD_WAKE_AFFINE is a flag to
> > try selecting the waker CPU to run the waking task.
> > 
> > SD_BALANCE_WAKE is not a sched_domain flag, but SD_WAKE_AFFINE is.
> 
> No, SD_BALANCE_{FORK,EXEC,WAKE} are very much sched_domain flags.
> 
> They indicate how wide we should look to place tasks on these events.

With this patch, they are, and in particular SD_BALANCE_WAKE is.

SD_WAKE_AFFINE is just a particular CPU candidate in SD_BALANCE_WAKE.

      reply	other threads:[~2016-05-31  9:32 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-31  1:11 [RFC PATCH 0/2] Remove and replace SD_WAKE_AFFINE with SD_BALANCE_WAKE Yuyang Du
2016-05-31  1:11 ` [RFC PATCH 1/2] sched: Clean up SD_BALANCE_WAKE flags in sched domain build-up Yuyang Du
2016-05-31  9:21   ` Peter Zijlstra
2016-05-31  1:31     ` Yuyang Du
2016-05-31 10:41       ` Peter Zijlstra
2016-05-31 18:00         ` Yuyang Du
2016-06-01  5:07       ` Mike Galbraith
2016-06-01  0:01         ` Yuyang Du
2016-06-01  8:32           ` Vincent Guittot
2016-06-01  1:03             ` Yuyang Du
2016-06-01  9:24               ` Vincent Guittot
2016-06-01 19:35                 ` Yuyang Du
2016-06-02  6:56                   ` Vincent Guittot
2016-06-01 23:19                     ` Yuyang Du
2016-06-01  9:36           ` Mike Galbraith
2016-06-01 20:03             ` Yuyang Du
2016-06-02  5:50               ` Mike Galbraith
2016-06-01 22:41                 ` Yuyang Du
2016-06-02  6:44                   ` Mike Galbraith
2016-05-31  1:11 ` [RFC PATCH 2/2] sched: Remove SD_WAKE_AFFINE flag and replace it with SD_BALANCE_WAKE Yuyang Du
2016-05-31  9:23   ` Peter Zijlstra
2016-05-31  1:34     ` Yuyang Du [this message]

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