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

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Message-ID: <20180719121837.GA13799@cmpxchg.org>
Date:   Thu, 19 Jul 2018 08:18:37 -0400
From:   Johannes Weiner <hannes@...xchg.org>
To:     peter enderborg <peter.enderborg@...y.com>
Cc:     Michal Hocko <mhocko@...nel.org>,
        Daniel Drake <drake@...lessm.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        cgroups@...r.kernel.org, linux@...lessm.com,
        linux-block@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andrew Morton <akpm@...uxfoundation.org>,
        Tejun Heo <tj@...nel.org>,
        Balbir Singh <bsingharora@...il.com>,
        Mike Galbraith <efault@....de>,
        Oliver Yang <yangoliver@...com>,
        Shakeel Butt <shakeelb@...gle.com>,
        xxx xxx <x.qendo@...il.com>,
        Taras Kondratiuk <takondra@...co.com>,
        Daniel Walker <danielwa@...co.com>,
        Vinayak Menon <vinmenon@...eaurora.org>,
        Ruslan Ruslichenko <rruslich@...co.com>, kernel-team@...com
Subject: Re: [PATCH 0/10] psi: pressure stall information for CPU, memory,
 and IO v2

On Thu, Jul 19, 2018 at 01:29:39PM +0200, peter enderborg wrote:
> On 07/19/2018 12:21 AM, Johannes Weiner wrote:
> >
> > Yes, we currently use a userspace application that monitors pressure
> > and OOM kills (there is usually plenty of headroom left for a small
> > application to run by the time quality of service for most workloads
> > has already tanked to unacceptable levels). We want to eventually add
> > this back into the kernel with the appropriate configuration options
> > (pressure threshold value and sustained duration etc.)
> Is that the same application as googles lmkd for android? Any source
> that you might share?

Sure! This is the oomd we've been developing and using at Facebook:

	https://github.com/facebookincubator/oomd