linux-kernel - Re: [RFC 0/1] add support for reclaiming priorities per mem cgroup

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Message-ID: <CALvZod7Dr+YaYcSpUYCMAjotnU4hH=TnZWaL6mbBzLq=O3GJTA@mail.gmail.com>
Date:   Thu, 30 Mar 2017 09:48:55 -0700
From:   Shakeel Butt <shakeelb@...gle.com>
To:     Johannes Weiner <hannes@...xchg.org>
Cc:     Tim Murray <timmurray@...gle.com>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        LKML <linux-kernel@...r.kernel.org>, cgroups@...r.kernel.org,
        Linux MM <linux-mm@...ck.org>, surenb@...gle.com,
        totte@...gle.com, kernel-team@...roid.com
Subject: Re: [RFC 0/1] add support for reclaiming priorities per mem cgroup

> A more useful metric for memory pressure at this point is quantifying
> that time you spend thrashing: time the job spends in direct reclaim
> and on the flipside time the job waits for recently evicted pages to
> come back. Combined, that gives you a good measure of overhead from
> memory pressure; putting that in relation to a useful baseline of
> meaningful work done gives you a portable scale of how effictively
> your job is running.
>
> I'm working on that right now, hopefully I'll have something useful
> soon.

Johannes, is the work you are doing only about file pages or will it
equally apply to anon pages as well?