linux-kernel - Re: [Nbd] [RESEND][PATCH 0/5] nbd improvements

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: <20160915124103.GA20657@infradead.org>
Date:   Thu, 15 Sep 2016 05:41:03 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Alex Bligh <alex@...x.org.uk>
Cc:     Christoph Hellwig <hch@...radead.org>, Wouter Verhelst <w@...r.be>,
        "nbd-general@...ts.sourceforge.net" 
        <nbd-general@...ts.sourceforge.net>, linux-block@...r.kernel.org,
        Josef Bacik <jbacik@...com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        mpa@...gutronix.de, kernel-team@...com
Subject: Re: [Nbd] [RESEND][PATCH 0/5] nbd improvements

On Thu, Sep 15, 2016 at 01:39:11PM +0100, Alex Bligh wrote:
> That's probably right in the case of file-based back ends that
> are running on a Linux OS. But gonbdserver for instance supports
> (e.g.) Ceph based backends, where each connection might be talking
> to a completely separate ceph node, and there may be no cache
> consistency between connections.

Yes, if you don't have a cache coherent backend you are generally
screwed with a multiqueue protocol.