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  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:   Tue, 18 Aug 2020 09:00:10 +0200
From:   Christoph Hellwig <hch@....de>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     Christoph Hellwig <hch@....de>, Coly Li <colyli@...e.de>,
        linux-block@...r.kernel.org, linux-nvme@...ts.infradead.org,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        stable <stable@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Chaitanya Kulkarni <chaitanya.kulkarni@....com>,
        Hannes Reinecke <hare@...e.de>, Jan Kara <jack@...e.com>,
        Jens Axboe <axboe@...nel.dk>,
        Mikhail Skorzhinskii <mskorzhinskiy@...arflare.com>,
        Philipp Reisner <philipp.reisner@...bit.com>,
        Sagi Grimberg <sagi@...mberg.me>,
        Vlastimil Babka <vbabka@...e.com>
Subject: Re: [PATCH v5 1/3] net: introduce helper sendpage_ok() in
 include/linux/net.h

On Mon, Aug 17, 2020 at 12:12:12PM -0700, Cong Wang wrote:
> 
> So netdev people will have to understand and support PageSlab() or
> page_count()?

Yes.  As they came up with that contrived rule what is acceptable
for sendpage.  No one else really knows and other subsystems like the
block layer are perfectly fine with it.

> 
> If it is unusual even for mm people, how could netdev people suppose
> to understand this unusual mm bug? At least not any better.

It is not a mm bug, it is a networking quirk.

Powered by blists - more mailing lists