Re: [Nbd] [PATCH 0/5] nbd improvements

[Jens Axboe <axboe@...2204...>]

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