linux-kernel - Re: [PATCH 0/10] psi: pressure stall information for CPU, memory, and IO v2

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Message-ID: <20180730154035.GC4567@cmpxchg.org>
Date:   Mon, 30 Jul 2018 11:40:35 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     Pavel Machek <pavel@....cz>
Cc:     Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Tejun Heo <tj@...nel.org>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Vinayak Menon <vinmenon@...eaurora.org>,
        Christopher Lameter <cl@...ux.com>,
        Mike Galbraith <efault@....de>,
        Shakeel Butt <shakeelb@...gle.com>, linux-mm@...ck.org,
        cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com
Subject: Re: [PATCH 0/10] psi: pressure stall information for CPU, memory,
 and IO v2

On Sat, Jul 28, 2018 at 12:01:23AM +0200, Pavel Machek wrote:
> > 		How do you use this feature?
> > 
> > A kernel with CONFIG_PSI=y will create a /proc/pressure directory with
> > 3 files: cpu, memory, and io. If using cgroup2, cgroups will also
> 
> Could we get the config named CONFIG_PRESSURE to match /proc/pressure?
> "PSI" is little too terse...

I'd rather have the internal config symbol match the naming scheme in
the code, where psi is a shorter, unique token as copmared to e.g.
pressure, press, prsr, etc.

The prompt text that the user primarily sees spells out "Pressure", so
I don't think this is confusing.