From: Viresh Kumar <viresh.kumar@linaro.org>
To: "CAJZ5v0gtjq9Nh0WHbMzY+3Z3o5NWiWhP=QEXxzjVe3ta32z7=Q@mail.gmail.com"
<CAJZ5v0gtjq9Nh0WHbMzY+3Z3o5NWiWhP=QEXxzjVe3ta32z7=Q@mail.gmail.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
Juri Lelli <juri.lelli@gmail.com>,
Rafael Wysocki <rjw@rjwysocki.net>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Viresh Kumar <vireshk@kernel.org>,
Linux PM <linux-pm@vger.kernel.org>,
Vincent Guittot <vincent.guittot@linaro.org>,
Matthias Kaehlcke <mka@chromium.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/3] drivers: Frequency constraint infrastructure
Date: Wed, 30 Jan 2019 10:57:52 +0530 [thread overview]
Message-ID: <20190130052752.v2zujifnkm3o7krf@vireshk-i7> (raw)
In-Reply-To: <20190128140441.yetyx7hgtdoyk4mn@e107158-lin.cambridge.arm.com>
On 28-01-19, 14:04, Qais Yousef wrote:
> But we have no way to enforce this, no? I'm thinking if frequency can be
> constrained in PM QoS framework, then we will end up with some drivers that
> think it's a good idea to use it and potentially end up breaking this "should
> not work against schedutil and similar".
>
> Or did I miss something?
>
> My point is that if we introduce something too generic we might end up
> encouraging more users and end up with a complex set of rules/interactions and
> lose some determinism. But I could be reading too much into it :-)
People are free to use notifiers today as well and there is nobody
stopping them. A new framework/layer may actually make them more
accountable as we can easily record which all entities have requested
to impose a freq-limit on CPUs.
--
viresh
next prev parent reply other threads:[~2019-01-30 5:27 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-11 9:18 Viresh Kumar
2019-01-11 9:18 ` [PATCH 1/3] drivers: base: Add frequency " Viresh Kumar
2019-01-18 1:03 ` Matthias Kaehlcke
2019-01-18 10:02 ` Viresh Kumar
2019-01-18 22:45 ` Matthias Kaehlcke
2019-01-22 7:09 ` Viresh Kumar
2019-01-22 17:50 ` Matthias Kaehlcke
2019-01-11 9:18 ` [PATCH 2/3] cpufreq: Implement freq-constraint callback Viresh Kumar
2019-01-18 1:46 ` Matthias Kaehlcke
2019-01-18 1:49 ` Matthias Kaehlcke
2019-01-11 9:18 ` [PATCH 3/3] cpufreq: Implement USER constraint Viresh Kumar
2019-01-11 9:47 ` [PATCH 0/3] drivers: Frequency constraint infrastructure Rafael J. Wysocki
2019-01-17 13:16 ` Juri Lelli
2019-01-17 14:55 ` Rafael J. Wysocki
2019-01-18 12:39 ` Juri Lelli
2019-01-21 11:10 ` Rafael J. Wysocki
2019-01-22 19:30 ` Matthias Kaehlcke
[not found] ` <CA+mqd+7EqERei8eekAsVxa_bJUYETyO3T76L8Q_sV=C9rwiy3g@mail.gmail.com>
2019-01-28 14:04 ` Qais Yousef
2019-01-30 5:27 ` Viresh Kumar [this message]
2019-01-30 5:25 ` Viresh Kumar
2019-02-08 9:08 ` Viresh Kumar
2019-02-08 9:09 ` Viresh Kumar
2019-02-08 9:53 ` Rafael J. Wysocki
2019-02-08 10:23 ` Viresh Kumar
2019-02-08 10:35 ` Rafael J. Wysocki
2019-02-11 5:43 ` Viresh Kumar
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