linux-kernel - Re: [GIT PULL] Staging/IIO driver patches for 5.4-rc1

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: <20190918211123.GA22600@hsiangkao-HP-ZHAN-66-Pro-G1>
Date:   Thu, 19 Sep 2019 05:11:28 +0800
From:   Gao Xiang <hsiangkao@....com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Greg KH <gregkh@...uxfoundation.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, devel@...uxdriverproject.org
Subject: Re: [GIT PULL] Staging/IIO driver patches for 5.4-rc1

Hi Christoph,

On Wed, Sep 18, 2019 at 11:24:12AM -0700, Christoph Hellwig wrote:
> Just as a note of record:  I don't think either file system move
> is a good idea.  erofs still needs a lot of work, especially in
> interacting with the mm code like abusing page->mapping.

I know what you mean, that is a known stuff in the TODO list,
Z_EROFS_MAPPING_STAGING page->mapping just be used as a temporary
page mark since page->private is already pointed to another
structure, It's now be marked as an non-movable and anon pseudo
mapping and most mm code just skip this case.

I think a better way is to use a real address_space structure for
page->mapping to point. It's easy to update but I need some time
to verify. If I am wrong, please point it out...

Thanks,
Gao Xiang