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[209.85.220.41]) by mx.google.com with SMTPS id l184sor8698613wml.4.2019.04.23.10.35.00 for (Google Transport Security); Tue, 23 Apr 2019 10:35:00 -0700 (PDT) Received-SPF: pass (google.com: domain of surenb@google.com designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b=Nj76MHae; spf=pass (google.com: domain of surenb@google.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=surenb@google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=qzFuDLbrnGh5wznnk+v0n5g8UB/75JWXjUeYUHwmbCE=; b=Nj76MHaeVYnJlpOz01FrSjWdpGajpTvndjXJq98V79klCSQQyWgKBusKQWVC/pC8og Y276I6V3wWzCMX9Vkz8kq/gUI9wwGPyhWCHYdlmzpy70N4GH/efGT2liK/zizfDVdiLY LD+3PUH2XEDOt6XoNK5i2NLz7vEOULMz+LqF5DrhuVkWKlDDzQtFxzx1g8K6nuPQCJnS LiXMTV5R+PWF/6HY0Wl218k28FvgeTbDarw76RtmnNsYyj9GLfDmSfuJNZ8OXP9VHIp9 XUE1OumEEfLoDOLu4zI7lpkd8Sb+kwdIA6ywU0GU31Rtck6wQkqUFyujwyGR3tTbM77q 3rxg== X-Google-Smtp-Source: APXvYqwXRBuAEtzf0CNNqpbtc7maxOPyCk6Zh4FAIhAuQsGSKFwibWJ0lSOUKD3t9myjUj/+PF6nF+m+3JItNjc5ls4= X-Received: by 2002:a1c:1f46:: with SMTP id f67mr286948wmf.74.1556040900069; Tue, 23 Apr 2019 10:35:00 -0700 (PDT) MIME-Version: 1.0 References: <8588314f167c9525e134ade91afdbebcd9e62eb1.camel@surriel.com> In-Reply-To: <8588314f167c9525e134ade91afdbebcd9e62eb1.camel@surriel.com> From: Suren Baghdasaryan Date: Tue, 23 Apr 2019 10:34:48 -0700 Message-ID: Subject: Re: [LSF/MM TOPIC] Proactive Memory Reclaim To: Rik van Riel Cc: Shakeel Butt , lsf-pc@lists.linux-foundation.org, Linux MM , Michal Hocko , Johannes Weiner , Roman Gushchin , Tim Murray , Minchan Kim , Sandeep Patil Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Apr 23, 2019 at 9:08 AM Rik van Riel wrote: > > On Tue, 2019-04-23 at 08:30 -0700, Shakeel Butt wrote: > > > Topic: Proactive Memory Reclaim > > > > Motivation/Problem: Memory overcommit is most commonly used technique > > to reduce the cost of memory by large infrastructure owners. However > > memory overcommit can adversely impact the performance of latency > > sensitive applications by triggering direct memory reclaim. Direct > > reclaim is unpredictable and disastrous for latency sensitive > > applications. > > This sounds similar to a project Johannes has > been working on, except he is not tracking which > memory is idle at all, but only the pressure on > each cgroup, through the PSI interface: > > https://facebookmicrosites.github.io/psi/docs/overview > > Discussing the pros and cons, and experiences with > both approaches seems like a useful topic. I'll add > it to the agenda. This topic sounds interesting and in line with some experiments being done on Android. Looking forward to this discussion. CC'ing Android folks that might be interested as well. > -- > All Rights Reversed.