From: "Michael S. Tsirkin" <mst@redhat.com>
To: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: virtio@lists.oasis-open.org, virtio-dev@lists.oasis-open.org,
linux-rdma@vger.kernel.org, qemu-devel@nongnu.org,
Marcel Apfelbaum <marcel.a@redhat.com>
Subject: Re: [Qemu-devel] host side todo list for virtio rdma
Date: Sat, 29 Jul 2017 02:48:33 +0300 [thread overview]
Message-ID: <20170729024712-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20170728180255.GF2560@work-vm>
On Fri, Jul 28, 2017 at 07:02:55PM +0100, Dr. David Alan Gilbert wrote:
> OK, does it seem silly for a message to go all the way to the host
> kernel to then have to go back down to QEMU to be turned back into verbs
> to go back upto the host kernel?
This is how most IO works except vhost. If it's not a data path
there's no need to write code to avoid some context switches IMHO.
--
MST
WARNING: multiple messages have this Message-ID (diff)
From: "Michael S. Tsirkin" <mst@redhat.com>
To: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: virtio@lists.oasis-open.org, virtio-dev@lists.oasis-open.org,
linux-rdma@vger.kernel.org, qemu-devel@nongnu.org,
Marcel Apfelbaum <marcel.a@redhat.com>
Subject: [virtio] Re: [Qemu-devel] host side todo list for virtio rdma
Date: Sat, 29 Jul 2017 02:48:33 +0300 [thread overview]
Message-ID: <20170729024712-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20170728180255.GF2560@work-vm>
On Fri, Jul 28, 2017 at 07:02:55PM +0100, Dr. David Alan Gilbert wrote:
> OK, does it seem silly for a message to go all the way to the host
> kernel to then have to go back down to QEMU to be turned back into verbs
> to go back upto the host kernel?
This is how most IO works except vhost. If it's not a data path
there's no need to write code to avoid some context switches IMHO.
--
MST
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next prev parent reply other threads:[~2017-07-28 23:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-19 2:05 host side todo list for virtio rdma Michael S. Tsirkin
2017-07-19 2:05 ` [Qemu-devel] " Michael S. Tsirkin
2017-07-19 2:05 ` [virtio] " Michael S. Tsirkin
[not found] ` <20170719004721-mutt-send-email-mst-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2017-07-19 10:55 ` [Qemu-devel] " Dr. David Alan Gilbert
2017-07-19 10:55 ` Dr. David Alan Gilbert
2017-07-25 14:05 ` Michael S. Tsirkin
2017-07-25 14:05 ` Michael S. Tsirkin
2017-07-25 14:05 ` [virtio] " Michael S. Tsirkin
[not found] ` <20170725165915-mutt-send-email-mst-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2017-07-28 18:02 ` Dr. David Alan Gilbert
2017-07-28 18:02 ` Dr. David Alan Gilbert
2017-07-28 23:48 ` Michael S. Tsirkin [this message]
2017-07-28 23:48 ` [virtio] " Michael S. Tsirkin
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