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Date:   Thu, 19 Jul 2018 08:18:37 -0400
From:   Johannes Weiner <hannes@cmpxchg.org>
To:     peter enderborg <peter.enderborg@sony.com>
Cc:     Michal Hocko <mhocko@kernel.org>,
        Daniel Drake <drake@endlessm.com>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        cgroups@vger.kernel.org, linux@endlessm.com,
        linux-block@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Andrew Morton <akpm@linuxfoundation.org>,
        Tejun Heo <tj@kernel.org>,
        Balbir Singh <bsingharora@gmail.com>,
        Mike Galbraith <efault@gmx.de>,
        Oliver Yang <yangoliver@me.com>,
        Shakeel Butt <shakeelb@google.com>,
        xxx xxx <x.qendo@gmail.com>,
        Taras Kondratiuk <takondra@cisco.com>,
        Daniel Walker <danielwa@cisco.com>,
        Vinayak Menon <vinmenon@codeaurora.org>,
        Ruslan Ruslichenko <rruslich@cisco.com>, kernel-team@fb.com
Subject: Re: [PATCH 0/10] psi: pressure stall information for CPU, memory,
 and IO v2
Message-ID: <20180719121837.GA13799@cmpxchg.org>
References: <20180712172942.10094-1-hannes@cmpxchg.org>
 <20180716155745.10368-1-drake@endlessm.com>
 <20180717112515.GE7193@dhcp22.suse.cz>
 <20180718222157.GG2838@cmpxchg.org>
 <143db4db-2613-345d-9b8e-1794b6d8c4fe@sony.com>
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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