From: Stefan Hajnoczi <stefanha@redhat.com>
To: Liu Yuan <namei.unix@gmail.com>
Cc: Kevin Wolf <kwolf@redhat.com>,
Anthony Liguori <aliguori@us.ibm.com>,
"Michael S. Tsirkin" <mst@redhat.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 00/11] virtio: virtio-blk data plane
Date: Fri, 7 Dec 2012 06:46:14 +0100 [thread overview]
Message-ID: <20121207054614.GD4973@stefanha-thinkpad.redhat.com> (raw)
In-Reply-To: <50C157CC.1000405@gmail.com>
On Fri, Dec 07, 2012 at 10:43:24AM +0800, Liu Yuan wrote:
> On 12/06/2012 04:46 AM, Stefan Hajnoczi wrote:
> > Limitations:
> > * Only format=raw is supported
>
> The boost number looks promising, but support of other format(which
> might as well fit into this new IO path design) is in the plan? It seems
> that bypassing block layer would end up adding yet another 'block layer'
> as we add more format support.
Right, that's why the next step is to complete the AioContext work that
Paolo recently contributed. It will allow us to run the QEMU block
layer outside the global mutex.
Once that refactoring is complete the data plane thread will be able to
run image format code.
We'll need to be careful so as not to lose the level of performance that
it achieves right now, but there is no fundamental reason why we cannot
continue to keep this level of performance while still supporting image
formats.
Stefan
prev parent reply other threads:[~2012-12-07 5:46 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
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 [this message]
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