linux-kernel - Re: Struct page proposal

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Message-ID: <CAHk-=wjaL3xcv6LL=1+WdaicaDngvNOTCYU5c9UF_MTsibWBSw@mail.gmail.com>
Date:   Mon, 27 Sep 2021 11:34:54 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Kent Overstreet <kent.overstreet@...il.com>
Cc:     Vlastimil Babka <vbabka@...e.cz>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux-MM <linux-mm@...ck.org>,
        Johannes Weiner <hannes@...xchg.org>,
        Matthew Wilcox <willy@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "Darrick J. Wong" <djwong@...nel.org>,
        Christoph Hellwig <hch@...radead.org>,
        David Howells <dhowells@...hat.com>
Subject: Re: Struct page proposal

On Mon, Sep 27, 2021 at 10:54 AM Kent Overstreet
<kent.overstreet@...il.com> wrote:
>
> That list_head is the problematic one. Why do we need to be able to take a page
> from the middle of a freelist?

At least for the merging with the buddy page case.

          Linus