linux-kernel - Re: [PATCHv2] cpufreq/schedutil: Only bind threads if needed

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Message-ID: <e09f3682-ee0c-4abc-b387-5358bbdf6e79@arm.com>
Date: Mon, 7 Oct 2024 11:42:38 +0100
From: Christian Loehle <christian.loehle@....com>
To: "Rafael J. Wysocki" <rafael@...nel.org>,
 Peter Zijlstra <peterz@...radead.org>, Juri Lelli <juri.lelli@...hat.com>
Cc: Viresh Kumar <viresh.kumar@...aro.org>, Qais Yousef
 <qyousef@...alina.io>, Vincent Guittot <vincent.guittot@...aro.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 linux-pm <linux-pm@...r.kernel.org>,
 Dietmar Eggemann <dietmar.eggemann@....com>,
 Pierre Gondois <pierre.gondois@....com>
Subject: Re: [PATCHv2] cpufreq/schedutil: Only bind threads if needed

On 10/1/24 19:31, Rafael J. Wysocki wrote:
> On Fri, Sep 27, 2024 at 10:59 AM Christian Loehle
> <christian.loehle@....com> wrote:
>>
>> Remove the unconditional binding of sugov kthreads to the affected CPUs
>> if the cpufreq driver indicates that updates can happen from any CPU.
>> This allows userspace to set affinities to either save power (waking up
>> bigger CPUs on HMP can be expensive) or increasing performance (by
>> letting the utilized CPUs run without preemption of the sugov kthread).
>>
>> Signed-off-by: Christian Loehle <christian.loehle@....com>
> 
> Acked-by: Rafael J. Wysocki <rafael@...nel.org>
> 
> and I'm assuming that this will go in via tip.

Peter, is that fine with you?

@Juri: I didn't add your (somewhat implied?) ACK on v2, so I'd be happy to
get it on the dl_task_check_affinity() part.

Regards,
Christian