linux-kernel - Re: [PATCH v3 0/7] Split a folio to any lower order folios

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Date:   Tue, 4 Apr 2023 14:47:27 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Zi Yan <ziy@...dia.com>
Cc:     Zi Yan <zi.yan@...t.com>,
        "Matthew Wilcox (Oracle)" <willy@...radead.org>,
        Yang Shi <shy828301@...il.com>, Yu Zhao <yuzhao@...gle.com>,
        linux-mm@...ck.org,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>,
        Ryan Roberts <ryan.roberts@....com>,
        Michal Koutný <mkoutny@...e.com>,
        Roman Gushchin <roman.gushchin@...ux.dev>,
        "Zach O'Keefe" <zokeefe@...gle.com>, linux-kernel@...r.kernel.org,
        cgroups@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v3 0/7] Split a folio to any lower order folios

On Mon,  3 Apr 2023 16:18:32 -0400 Zi Yan <zi.yan@...t.com> wrote:

> File folio supports any order and people would like to support flexible orders
> for anonymous folio[1] too. Currently, split_huge_page() only splits a huge
> page to order-0 pages, but splitting to orders higher than 0 is also useful.
> This patchset adds support for splitting a huge page to any lower order pages
> and uses it during file folio truncate operations.

This series (and its v1 & v2) don't appear to have much in the way of
detailed review.  As it's at v3 and has been fairly stable I'll queue
it up for some testing now, but I do ask that some reviewers go through
it please.