Re: [Qemu-devel] [PATCH v5 0/4] Introduce vhost-user-scsi and sample application

From: "Harris, James R" <james.r.harris@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
	"Liu, Changpeng" <changpeng.liu@intel.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>,
	Felipe Franciosi <felipe@nutanix.com>,
	Stefan Hajnoczi <stefanha@redhat.com>,
	Marc-Andre Lureau <marcandre.lureau@redhat.com>,
	"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
	"Daniel P. Berrange" <berrange@redhat.com>
Subject: Re: [Qemu-devel] [PATCH v5 0/4] Introduce vhost-user-scsi and sample application
Date: Thu, 6 Jul 2017 17:03:39 +0000	[thread overview]
Message-ID: <7813DE88-EB6D-4330-AC69-27E7051C4000@intel.com> (raw)
In-Reply-To: <30b1f1cb-f959-7711-96c2-5d5c138135e1@redhat.com>

> On Jul 6, 2017, at 9:56 AM, Paolo Bonzini <pbonzini@redhat.com> wrote:
> 
> 
> 
> On 06/07/2017 18:54, Harris, James R wrote:
>> Hi Michael,
>> 
>> Yes - we (SPDK team at Intel) have this on our TODO list, in addition
>> to a polled mode virtio-scsi driver (akin to the DPDK virtio-net driver that
>> can be used in the guest).
> 
> Can you also look at virtio-blk poll-mode drivers and vhost-user-blk
> (vhost-user-blk would be really easy to write, the sample server being
> much more work than the QEMU code)?
> 
> Paolo

Hi Paolo,

vhost-user-blk:

We have an initial implementation in our SPDK QEMU repo.  Changpeng Liu (added)
will be sending this to the QEMU mailing list shortly.  If you are interested in viewing it
before it hits the mailing list, you can take a look at the patch here:

https://github.com/spdk/qemu/commit/db2fcb0f5002c3d195e756eab07bd976ccf6e7c8

virtio-blk poll-mode driver:

Yes - this is part of our plan as well - once we have virtio-scsi in place, adding virtio-blk
will be relatively straightforward.

Thanks,

-Jim