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

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Message-ID: <aee66977-c8f2-dab7-0649-f4e71fdc31f8@fb.com>
Date:   Thu, 8 Sep 2016 14:13:46 -0600
From:   Jens Axboe <axboe@...com>
To:     Josef Bacik <jbacik@...com>, <linux-block@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <kernel-team@...com>,
        <mpa@...gutronix.de>, <nbd-general@...ts.sourceforge.net>
Subject: Re: [PATCH 0/5] nbd improvements

On 09/08/2016 01:33 PM, Josef Bacik wrote:
> This is a patch series aimed at bringing NBD into 2016.  The two big
> components of this series is converting nbd over to using blkmq and
> then allowing us to provide more than one connection for a nbd device.
> The NBD user space server doesn't care about how many connections it
> has to a particular device, so we can easily open multiple
> connections to the server and allow blkmq to handle multi-plexing over
> the different connections.  This drastically improves performance
> with multi-threaded workloads over NBD.  The multi-connection support
> requires some changes to the NBD userspace client code, and you can
> find that code here
>
> https://github.com/josefbacik/nbd
>
> I have been testing this for a few months and it is pretty solid and gives
> excellent performance improvements.  Thanks,

Not only are these nice performance improvements, it also cleans up the
code a lot and kills crufty old driver code in favor of using the proper
APIs instead. I have applied the series for 4.9.

-- 
Jens Axboe