linux-kernel - Re: [PATCH] mm,thp: recheck each page before collapsing file THP

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <f4c5c920961732fe855748cd5304f77b0c556b29.camel@fb.com>
Date:   Fri, 18 Oct 2019 13:06:49 +0000
From:   Rik van Riel <riel@...com>
To:     Song Liu <songliubraving@...com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
CC:     "matthew.wilcox@...cle.com" <matthew.wilcox@...cle.com>,
        Kernel Team <Kernel-team@...com>,
        "william.kucharski@...cle.com" <william.kucharski@...cle.com>,
        "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
        Johannes Weiner <hannes@...xchg.org>,
        "Hugh Dickins" <hughd@...gle.com>
Subject: Re: [PATCH] mm,thp: recheck each page before collapsing file THP

On Thu, 2019-10-17 at 22:08 -0700, Song Liu wrote:
> In collapse_file(), after locking the page, it is necessary to
> recheck
> that the page is up-to-date, clean, and pointing to the proper
> mapping.
> If any check fails, abort the collapse.
> 
> Fixes: 99cb0dbd47a1 ("mm,thp: add read-only THP support for (non-
> shmem) FS")
> Cc: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Cc: Johannes Weiner <hannes@...xchg.org>
> Cc: Hugh Dickins <hughd@...gle.com>
> Cc: William Kucharski <william.kucharski@...cle.com>
> Cc: Andrew Morton <akpm@...ux-foundation.org>
> Signed-off-by: Song Liu <songliubraving@...com>

Acked-by: Rik van Riel <riel@...riel.com>