From: Arnd Bergmann <arnd@arndb.de>
To: virtualization@lists.linux-foundation.org
Subject: Re: [RFC 1/4] New virtio bus driver
Date: Mon, 9 Jul 2007 13:38:19 +0200 [thread overview]
Message-ID: <200707091338.20288.arnd@arndb.de> (raw)
In-Reply-To: <46921EDF.7080602@qumranet.com>
On Monday 09 July 2007, Avi Kivity wrote:
> > The problem with hotplugging devices on PCI is that there is not a good
> > standard for this yet. The best option we have is probably PCI express
> > hotplug, but I'm not sure how many legacy operating systems already support
> > this.
>
> This is indeed a problem. Perhaps we should have a virtqueue for
> reconfiguration (with a couple of read messages always queued for
> host-side changes, and a write message sent when the guest reconfigures).
Yes, that would be my preferred solution as well. For devices that need
reconfiguration capability, one virtqueue for all out-of-band information
should be enough, with device specific messages.
Why do you think we want to have multiple outstanding read messages?
I would guess that a single message is enough, you can always requeue
it after one event gets processed.
Arnd <><
next prev parent reply other threads:[~2007-07-09 11:38 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-06 12:42 [RFC 0/4] Using a generic bus_type for virtio arnd
2007-07-06 12:42 ` [RFC 1/4] New virtio bus driver arnd
2007-07-08 9:59 ` Avi Kivity
2007-07-08 15:29 ` Arnd Bergmann
2007-07-08 15:48 ` Avi Kivity
2007-07-08 20:29 ` Arnd Bergmann
2007-07-08 23:42 ` Rusty Russell
2007-07-09 6:49 ` Avi Kivity
2007-07-09 11:18 ` Arnd Bergmann
2007-07-09 11:41 ` Avi Kivity
2007-07-09 11:38 ` Arnd Bergmann [this message]
2007-07-09 12:09 ` Avi Kivity
2007-07-09 14:24 ` Arnd Bergmann
2007-07-09 14:56 ` Avi Kivity
2007-07-09 16:33 ` Arnd Bergmann
2007-07-10 1:53 ` Rusty Russell
2007-07-10 7:56 ` Avi Kivity
2007-07-10 1:17 ` Rusty Russell
2007-07-10 6:06 ` Avi Kivity
2007-07-06 12:42 ` [RFC 2/4] Convert virtio_net to new virtio bus arnd
2007-07-06 12:42 ` [RFC 3/4] Convert virtio_blk " arnd
2007-07-06 12:42 ` [RFC 4/4] Example virtio host implementation, using chardev arnd
2007-07-08 2:15 ` [RFC 0/4] Using a generic bus_type for virtio Rusty Russell
2007-07-08 9:45 ` Avi Kivity
2007-07-08 15:55 ` Arnd Bergmann
2007-07-08 9:42 ` Avi Kivity
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