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From: Peter Zijlstra <peterz@infradead.org>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: Valentin Schneider <valentin.schneider@arm.com>,
	Qais Yousef <qais.yousef@arm.com>, Ingo Molnar <mingo@redhat.com>,
	Juri Lelli <juri.lelli@redhat.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
	Andrew Morton <akpm@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Yury Norov <yury.norov@gmail.com>, Paul Turner <pjt@google.com>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	Josh Don <joshdon@google.com>,
	Pavan Kondeti <pkondeti@codeaurora.org>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/4] sched/rt: Distribute tasks in find_lowest_rq()
Date: Wed, 15 Apr 2020 11:39:35 +0200	[thread overview]
Message-ID: <20200415093935.GA20730@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200414162742.0ef4d9ee@gandalf.local.home>

On Tue, Apr 14, 2020 at 04:27:42PM -0400, Steven Rostedt wrote:
> On Tue, 14 Apr 2020 19:58:49 +0100
> Valentin Schneider <valentin.schneider@arm.com> wrote:
> 
> > To move this forward, I would suggest renaming the current cpumask_any_*()
> > into cpumask_first_*(), and THEN introduce the new pseudo-random
> > ones. People are then free to hand-fix specific locations if it makes sense
> > there, like you're doing for RT.
> 
> Or leave "cpumask_any()" as is, and create a new "cpumask_random()" for
> this purpose.

Well, that's just twisting words, not sure I like that. 'Any' really
means 'any'. So in order to preserve long term sanity, I'd vote for
Valentin's approach of converting existing users over to first.

  parent reply	other threads:[~2020-04-15  9:40 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-14 15:05 [PATCH 0/4] sched/rt: Distribute tasks in find_lowest_rq() Qais Yousef
2020-04-14 15:05 ` [PATCH 1/4] cpumask: Rename cpumask_any_and_distribute Qais Yousef
2020-04-14 15:05 ` [PATCH 2/4] cpumask: Make cpumask_any() truly random Qais Yousef
2020-04-14 16:19   ` Steven Rostedt
2020-04-15  9:36     ` Peter Zijlstra
2020-04-20 15:43       ` Qais Yousef
2020-04-20 21:36         ` Josh Don
2020-05-28  8:52   ` [cpumask] a7934287d8: BUG:using__this_cpu_read()in_preemptible[#]code:kworker kernel test robot
2020-05-28  8:52     ` kernel test robot
2020-04-14 15:05 ` [PATCH 3/4] cpumask: Convert cpumask_any_but() to the new random function Qais Yousef
2020-04-14 16:28   ` Steven Rostedt
2020-04-20 15:49     ` Qais Yousef
2020-04-14 15:05 ` [PATCH 4/4] sched/rt: Better distribute tasks that wakeup simultaneously Qais Yousef
2020-04-14 18:58 ` [PATCH 0/4] sched/rt: Distribute tasks in find_lowest_rq() Valentin Schneider
2020-04-14 20:27   ` Steven Rostedt
2020-04-14 20:56     ` Valentin Schneider
2020-04-15  9:39     ` Peter Zijlstra [this message]
2020-04-15 13:18       ` Steven Rostedt
2020-04-21 12:15       ` Qais Yousef
2020-04-21 12:13   ` Qais Yousef
2020-04-21 13:18     ` Valentin Schneider
2020-04-21 13:28       ` Vincent Guittot
2020-04-21 14:22         ` Yury Norov
2020-04-21 14:25         ` Qais Yousef
2020-04-21 14:09       ` Marc Zyngier
2020-04-21 14:22         ` Qais Yousef
2020-04-21 14:28           ` Marc Zyngier
2020-04-21 14:39             ` Qais Yousef

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