From: Stefan Hajnoczi <stefanha@redhat.com>
To: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>,
Anthony Liguori <aliguori@us.ibm.com>,
qemu-devel@nongnu.org, Blue Swirl <blauwirbel@gmail.com>,
khoa@us.ibm.com, Paolo Bonzini <pbonzini@redhat.com>,
asias@redhat.com
Subject: Re: [Qemu-devel] [PATCH v5 10/11] dataplane: add virtio-blk data plane code
Date: Fri, 7 Dec 2012 06:43:44 +0100 [thread overview]
Message-ID: <20121207054344.GC4973@stefanha-thinkpad.redhat.com> (raw)
In-Reply-To: <20121206113358.GL10837@redhat.com>
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
next prev parent reply other threads:[~2012-12-07 5:43 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-05 20:46 [Qemu-devel] [PATCH v5 00/11] virtio: virtio-blk data plane Stefan Hajnoczi
2012-12-05 20:47 ` [Qemu-devel] [PATCH v5 01/11] raw-posix: add raw_get_aio_fd() for virtio-blk-data-plane Stefan Hajnoczi
2012-12-05 20:47 ` [Qemu-devel] [PATCH v5 02/11] configure: add CONFIG_VIRTIO_BLK_DATA_PLANE Stefan Hajnoczi
2012-12-05 20:47 ` [Qemu-devel] [PATCH v5 03/11] dataplane: add host memory mapping code Stefan Hajnoczi
2012-12-09 4:02 ` liu ping fan
2012-12-09 10:36 ` Stefan Hajnoczi
2012-12-05 20:47 ` [Qemu-devel] [PATCH v5 04/11] dataplane: add virtqueue vring code Stefan Hajnoczi
2012-12-06 11:22 ` Michael S. Tsirkin
2012-12-06 12:53 ` Stefan Hajnoczi
2012-12-07 14:07 ` Kevin Wolf
2012-12-07 14:46 ` Stefan Hajnoczi
2012-12-05 20:47 ` [Qemu-devel] [PATCH v5 05/11] dataplane: add event loop Stefan Hajnoczi
2012-12-05 20:47 ` [Qemu-devel] [PATCH v5 06/11] dataplane: add Linux AIO request queue Stefan Hajnoczi
2012-12-07 14:21 ` Kevin Wolf
2012-12-10 13:05 ` Stefan Hajnoczi
2012-12-05 20:47 ` [Qemu-devel] [PATCH v5 07/11] iov: add iov_discard() to remove data Stefan Hajnoczi
2012-12-06 11:36 ` Michael S. Tsirkin
2012-12-06 14:07 ` Stefan Hajnoczi
2012-12-05 20:47 ` [Qemu-devel] [PATCH v5 08/11] test-iov: add iov_discard() testcase Stefan Hajnoczi
2012-12-05 20:47 ` [Qemu-devel] [PATCH v5 09/11] iov: add qemu_iovec_concat_iov() Stefan Hajnoczi
2012-12-05 20:47 ` [Qemu-devel] [PATCH v5 10/11] dataplane: add virtio-blk data plane code Stefan Hajnoczi
2012-12-06 7:35 ` Paolo Bonzini
2012-12-06 14:03 ` Stefan Hajnoczi
2012-12-07 6:06 ` Stefan Hajnoczi
2012-12-07 10:51 ` Paolo Bonzini
2012-12-06 11:33 ` Michael S. Tsirkin
2012-12-07 5:43 ` Stefan Hajnoczi [this message]
2012-12-07 18:04 ` Kevin Wolf
2012-12-10 13:06 ` Stefan Hajnoczi
2012-12-05 20:47 ` [Qemu-devel] [PATCH v5 11/11] virtio-blk: add x-data-plane=on|off performance feature Stefan Hajnoczi
2012-12-06 11:38 ` [Qemu-devel] [PATCH v5 00/11] virtio: virtio-blk data plane Michael S. Tsirkin
2012-12-07 6:12 ` Stefan Hajnoczi
2012-12-07 2:43 ` Liu Yuan
2012-12-07 5:46 ` Stefan Hajnoczi
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