linux-kernel - Re: [RFC PATCH] proc: add support detach proccess's autogroup

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Message-ID: <20200702081418.GZ4781@hirez.programming.kicks-ass.net>
Date:   Thu, 2 Jul 2020 10:14:18 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     mingo@...hat.com, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH] proc: add support detach proccess's autogroup

On Thu, Jul 02, 2020 at 01:20:43PM +0800, Weiping Zhang wrote:
> Since setid will create a autogroup for that process, there is no
> way to detach a process from that autogroup, this patch add a new interface
> to detach a process from its autogroup. You can write anything to
> /proc/<pid>/autogroup_detach to do that.

This is indeed what the patch does; but it fails to tell me why. Why do
we want this? Why should I care about your patch :-)

Please, always explain why you want things done, that can also help us
consider if the proposed solution is the right one.