linux-kernel - Re: [PATCH v2 0/5] variable-order, large folios for anonymous memory

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Message-ID: <ZKw4dJpNIPtSVKGA@casper.infradead.org>
Date:   Mon, 10 Jul 2023 17:57:24 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     Ryan Roberts <ryan.roberts@....com>
Cc:     David Hildenbrand <david@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Yin Fengwei <fengwei.yin@...el.com>,
        Yu Zhao <yuzhao@...gle.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Yang Shi <shy828301@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: Re: [PATCH v2 0/5] variable-order, large folios for anonymous memory

On Mon, Jul 10, 2023 at 11:07:47AM +0100, Ryan Roberts wrote:
> I think this compaction issue also affects large folios in the page cache? So
> really it is a pre-existing bug in the code base that needs to be fixed
> independently of large anon folios? Should I assume you are tackling this, Matthew?

It does need to be fixed independently of large anon folios.  Said fix
should probably be backported to 6.1 once it's suitably stable.  However,
I'm not working on it.  I have a lot of projects and this one's a
missed-opportunity, not a show-stopper.  Sounds like Zi Yan might be
interested in tackling it though!