From: Mark McLoughlin <markmc@redhat.com>
To: Alex Williamson <alex.williamson@hp.com>
Cc: netdev@vger.kernel.org, rusty@rustcorp.com.au, kvm@vger.kernel.org
Subject: Re: [PATCH 2/5] virtio_net: Add a virtqueue for outbound control commands
Date: Mon, 19 Jan 2009 09:32:44 +0000 [thread overview]
Message-ID: <1232357564.5627.17.camel@blaa> (raw)
In-Reply-To: <20090116211323.22836.40477.stgit@debian.lart>
On Fri, 2009-01-16 at 14:13 -0700, Alex Williamson wrote:
> This will be used for RX mode, MAC filter table, VLAN filtering, etc...
>
> The control transaction consists of one or more "out" sg entries and
> one or more "in" sg entries. The first out entry contains a header
> defining the class and command. Additional out entries may provide
> data for the command. The last in entry provides a status response
> back from the command.
>
> Virtqueues typically run asynchronous, running a callback function
> when there's data in the channel. We can't readily make use of this
> in the command paths where we need to use this. Instead, we kick
> the virtqueue and spin. The kick causes an I/O write, triggering an
> immediate trap into the hypervisor.
>
> Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Acked-by: Mark McLoughlin <markmc@redhat.com>
Cheers,
Mark.
next prev parent reply other threads:[~2009-01-19 9:32 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-16 21:13 [PATCH 0/5] virtio_net: Add MAC and VLAN filtering Alex Williamson
2009-01-16 21:13 ` [PATCH 1/5] virtio_net: Allow setting the MAC address of the NIC Alex Williamson
2009-01-19 9:32 ` Mark McLoughlin
2009-01-16 21:13 ` [PATCH 2/5] virtio_net: Add a virtqueue for outbound control commands Alex Williamson
2009-01-19 9:32 ` Mark McLoughlin [this message]
[not found] ` <200901271352.57887.rusty@rustcorp.com.au>
2009-01-27 4:00 ` Alex Williamson
2009-01-28 13:05 ` Rusty Russell
2009-01-28 19:02 ` Alex Williamson
2009-01-29 1:35 ` Rusty Russell
2009-01-16 21:13 ` [PATCH 3/5] virtio_net: Add a set_rx_mode interface Alex Williamson
2009-01-19 9:32 ` Mark McLoughlin
2009-01-16 21:13 ` [PATCH 4/5] virtio_net: Add a MAC filter table Alex Williamson
2009-01-19 9:33 ` Mark McLoughlin
[not found] ` <200901271300.30330.rusty@rustcorp.com.au>
2009-01-27 3:38 ` Alex Williamson
2009-01-28 10:45 ` Rusty Russell
2009-01-28 17:48 ` Alex Williamson
2009-01-28 23:55 ` Rusty Russell
2009-01-29 0:34 ` Herbert Xu
2009-01-29 6:17 ` David Stevens
2009-01-30 7:03 ` Rusty Russell
2009-01-16 21:13 ` [PATCH 5/5] virtio_net: Add support for VLAN filtering in the hypervisor Alex Williamson
2009-01-19 9:32 ` Mark McLoughlin
2009-01-20 16:36 ` Alex Williamson
2009-01-20 16:44 ` Mark McLoughlin
2009-01-26 2:08 ` David Miller
2009-01-26 17:42 ` Alex Williamson
[not found] ` <200901271422.33369.rusty@rustcorp.com.au>
2009-01-27 4:19 ` Alex Williamson
2009-01-19 6:05 ` [PATCH 0/5] virtio_net: Add MAC and VLAN filtering David Miller
2009-01-19 8:30 ` Mark McLoughlin
2009-01-20 1:10 ` David Miller
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