netdev - Re: [PATCH] remove CONFIG

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Message-ID: <YrzujZuJyfymC0LP@zx2c4.com>
Date:   Thu, 30 Jun 2022 02:30:05 +0200
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     John Stultz <jstultz@...gle.com>
Cc:     Kalesh Singh <kaleshsingh@...gle.com>,
        Christoph Hellwig <hch@....de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arve Hjønnevåg <arve@...roid.com>,
        Todd Kjos <tkjos@...roid.com>,
        Martijn Coenen <maco@...roid.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Christian Brauner <brauner@...nel.org>,
        Hridya Valsaraju <hridya@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Theodore Ts'o <tytso@....edu>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        "Alex Xu (Hello71)" <alex_y_xu@...oo.ca>,
        Paolo Abeni <pabeni@...hat.com>, Rob Herring <robh@...nel.org>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        Neeraj Upadhyay <quic_neeraju@...cinc.com>,
        Josh Triplett <josh@...htriplett.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Shuah Khan <shuah@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, wireguard@...ts.zx2c4.com,
        netdev@...r.kernel.org, rcu <rcu@...r.kernel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>, sultan@...neltoast.com,
        android-kernel-team <android-kernel-team@...gle.com>,
        Saravana Kannan <saravanak@...gle.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>
Subject: Re: [PATCH] remove CONFIG_ANDROID

Hey again,

On Thu, Jun 30, 2022 at 2:24 AM Jason A. Donenfeld <Jason@...c4.com> wrote:
> 1) Introduce a simple CONFIG_PM_CONTINUOUS_AUTOSLEEPING Kconfig thing
>    with lots of discouraging help text.
>
> 2) Go with the /sys/power tunable and bikeshed the naming of that a bit
>    to get it to something that reflects this better, and document it as
>    being undesirable except for Android phones.

One other quick thought, which I had mentioned earlier to Kalesh:

3) Make the semantics a process holding open a file descriptor, rather
   than writing 0/1 into a file. It'd be called /sys/power/
   userspace_autosleep_ctrl, or something, and it'd enable this behavior
   while it's opened. And maybe down the line somebody will want to add
   ioctls to it for a different purpose. This way it's less of a tunable
   and more of an indication that there's a userspace app doing/controlling
   something.

This idea (3) may be a lot of added complexity for basically nothing,
but it might fit the usage semantics concerns a bit better than (2). But
anyway, just an idea. Any one of those three are fine with me.

Jason