From: "Michael S. Tsirkin" <mst@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: gleb@redhat.com, Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>,
kvm@vger.kernel.org, qemu-devel@nongnu.org
Subject: [Qemu-devel] Re: [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify
Date: Thu, 11 Nov 2010 19:12:40 +0200 [thread overview]
Message-ID: <20101111171240.GA30171@redhat.com> (raw)
In-Reply-To: <4CDC20F1.1030305@redhat.com>
On Thu, Nov 11, 2010 at 06:59:29PM +0200, Avi Kivity wrote:
> On 11/11/2010 03:47 PM, Stefan Hajnoczi wrote:
> >Some virtio devices are known to have guest drivers which expect a notify to be
> >processed synchronously and spin waiting for completion. Only enable ioeventfd
> >for virtio-blk and virtio-net for now.
>
> Which drivers are these?
>
> I only know of the virtio-gl driver, which isn't upstream.
I think that PXE virtio drivers do polling. But I think this change does
not break these drivers. It'll probably make them a bit slower. Right,
Gleb?
--
MST
next prev parent reply other threads:[~2010-11-11 17:13 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-11 13:47 [Qemu-devel] [PATCH v2 0/3] virtio: Use ioeventfd for virtqueue notify Stefan Hajnoczi
2010-11-11 13:47 ` [Qemu-devel] [PATCH 1/3] virtio-pci: Rename bugs field to flags Stefan Hajnoczi
2010-11-11 13:47 ` [Qemu-devel] [PATCH 2/3] virtio-pci: Use ioeventfd for virtqueue notify Stefan Hajnoczi
2010-11-11 15:53 ` [Qemu-devel] " Michael S. Tsirkin
2010-11-12 9:18 ` Stefan Hajnoczi
2010-11-12 9:25 ` Michael S. Tsirkin
2010-11-12 13:10 ` Stefan Hajnoczi
2010-11-11 16:45 ` Christoph Hellwig
2010-11-12 9:20 ` Stefan Hajnoczi
2010-11-14 10:34 ` Avi Kivity
2010-11-14 10:37 ` Stefan Hajnoczi
2010-11-14 11:05 ` Avi Kivity
2010-11-14 12:19 ` Avi Kivity
2010-11-15 11:20 ` Stefan Hajnoczi
2010-12-01 11:44 ` Stefan Hajnoczi
2010-12-01 12:30 ` Avi Kivity
2010-12-01 21:34 ` Stefan Hajnoczi
2010-12-06 15:09 ` Avi Kivity
2010-11-11 16:59 ` Avi Kivity
2010-11-11 17:12 ` Michael S. Tsirkin [this message]
2010-11-11 17:55 ` Gleb Natapov
2010-11-11 13:47 ` [Qemu-devel] [PATCH 3/3] virtio-pci: Don't use ioeventfd on old kernels Stefan Hajnoczi
2010-11-11 17:46 ` [Qemu-devel] Re: [PATCH v2 0/3] virtio: Use ioeventfd for virtqueue notify Michael S. Tsirkin
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