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Re: [Qemu-devel] [PATCH v5 10/11] dataplane: add virtio-blk data plane c
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH v5 10/11] dataplane: add virtio-blk data plane code |
Date: |
Fri, 7 Dec 2012 06:43:44 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Thu, Dec 06, 2012 at 01:33:58PM +0200, Michael S. Tsirkin wrote:
> On Wed, Dec 05, 2012 at 09:47:09PM +0100, Stefan Hajnoczi wrote:
> > virtio-blk-data-plane is a subset implementation of virtio-blk.
>
> I already asked this:
>
> what confuses me a bit is how, being a subset, it exposes the
> same feature bits. For example wce config is ineffective, right?
> So I think it should not expose WCE feature bit.
It works like vhost - the virtio negotiation and setup is still handled
by QEMU but the actual vring processing is done by dataplane.
virtio-blk-data-plane works with cache=none. You're right that WCE
should not be toggled because we don't automatically flush after every
request.
Stefan
- Re: [Qemu-devel] [PATCH v5 07/11] iov: add iov_discard() to remove data, (continued)
- [Qemu-devel] [PATCH v5 11/11] virtio-blk: add x-data-plane=on|off performance feature, Stefan Hajnoczi, 2012/12/05
- [Qemu-devel] [PATCH v5 09/11] iov: add qemu_iovec_concat_iov(), Stefan Hajnoczi, 2012/12/05
- [Qemu-devel] [PATCH v5 08/11] test-iov: add iov_discard() testcase, Stefan Hajnoczi, 2012/12/05
- [Qemu-devel] [PATCH v5 10/11] dataplane: add virtio-blk data plane code, Stefan Hajnoczi, 2012/12/05
- Re: [Qemu-devel] [PATCH v5 10/11] dataplane: add virtio-blk data plane code, Michael S. Tsirkin, 2012/12/06
- Re: [Qemu-devel] [PATCH v5 10/11] dataplane: add virtio-blk data plane code,
Stefan Hajnoczi <=
- Re: [Qemu-devel] [PATCH v5 10/11] dataplane: add virtio-blk data plane code, Kevin Wolf, 2012/12/07
- Re: [Qemu-devel] [PATCH v5 00/11] virtio: virtio-blk data plane, Michael S. Tsirkin, 2012/12/06
- Re: [Qemu-devel] [PATCH v5 00/11] virtio: virtio-blk data plane, Liu Yuan, 2012/12/06