linux-kernel - Re: [RFC PATCH 0/4] Enable >0 order folio memory compaction

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Message-ID: <ZQuZdkxm/GMyS6wY@bombadil.infradead.org>
Date:   Wed, 20 Sep 2023 18:16:38 -0700
From:   Luis Chamberlain <mcgrof@...nel.org>
To:     Zi Yan <ziy@...dia.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Ryan Roberts <ryan.roberts@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        David Hildenbrand <david@...hat.com>,
        "Yin, Fengwei" <fengwei.yin@...el.com>,
        Yu Zhao <yuzhao@...gle.com>, Vlastimil Babka <vbabka@...e.cz>,
        Johannes Weiner <hannes@...xchg.org>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Kemeng Shi <shikemeng@...weicloud.com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Rohan Puri <rohan.puri15@...il.com>,
        Adam Manzanares <a.manzanares@...sung.com>,
        John Hubbard <jhubbard@...dia.com>
Subject: Re: [RFC PATCH 0/4] Enable >0 order folio memory compaction

On Wed, Sep 20, 2023 at 05:55:51PM -0700, Luis Chamberlain wrote:
> Are there other known recipes test help test this stuff?

You know, it got me wondering... since how memory fragmented a system
might be by just running fstests, because, well, we already have
that automated in kdevops and it also has LBS support for all the
different large block sizes on 4k sector size. So if we just had a
way to "measure" or "quantify" memory fragmentation with a score,
we could just tally up how we did after 4 hours of testing for each
block size with a set of memory on the guest / target node / cloud
system.

  Luis