linux-kernel - Re: [PATCH 1/3] userfaultfd: UFFDIO

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Message-ID: <CAJuCfpGEVhag8zsC1zA0acZna9vRhe9vnWHWW+ozE42atv9OOA@mail.gmail.com>
Date:   Thu, 14 Sep 2023 11:34:54 -0700
From:   Suren Baghdasaryan <surenb@...gle.com>
To:     Matthew Wilcox <willy@...radead.org>
Cc:     akpm@...ux-foundation.org, viro@...iv.linux.org.uk,
        brauner@...nel.org, shuah@...nel.org, aarcange@...hat.com,
        lokeshgidra@...gle.com, peterx@...hat.com, david@...hat.com,
        hughd@...gle.com, mhocko@...e.com, axelrasmussen@...gle.com,
        rppt@...nel.org, Liam.Howlett@...cle.com, jannh@...gle.com,
        zhangpeng362@...wei.com, bgeffon@...gle.com,
        kaleshsingh@...gle.com, ngeoffray@...gle.com, jdduke@...gle.com,
        linux-mm@...ck.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        kernel-team@...roid.com
Subject: Re: [PATCH 1/3] userfaultfd: UFFDIO_REMAP: rmap preparation

On Thu, Sep 14, 2023 at 10:56 AM Matthew Wilcox <willy@...radead.org> wrote:
>
> On Thu, Sep 14, 2023 at 08:26:11AM -0700, Suren Baghdasaryan wrote:
> > From: Andrea Arcangeli <aarcange@...hat.com>
> >
> > As far as the rmap code is concerned, UFFDIO_REMAP only alters the
> > page->mapping and page->index. It does it while holding the page
>
> folio->mapping and folio->index.  It does it while holding the folio

Ack.

>
> No other objections ...

Thanks for the review!