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

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Message-ID: <20180727220123.GB18879@amd>
Date:   Sat, 28 Jul 2018 00:01:23 +0200
From:   Pavel Machek <pavel@....cz>
To:     Johannes Weiner <hannes@...xchg.org>
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

Hi!

> The idea is to eventually incorporate this back into the kernel, so
> that Linux can avoid OOM livelocks (which TECHNICALLY aren't memory
> deadlocks, but for the user indistinguishable) out of the box.
> 
> We also use psi memory pressure for loadshedding. Our batch job

psi->PSI?

> 		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...

								Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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