Re: [Xen-devel] [1/3] [XEN] gnttab: Add new op unmap_and_replace

["Daniel P. Berrange" <berrange@xxxxxxxxxx>]

On Mon, Jun 04, 2007 at 02:18:13PM +0100, Keir Fraser wrote:
> On 4/6/07 14:12, "Daniel P. Berrange" <berrange@xxxxxxxxxx> wrote:
> 
> > Is that XenD itself keeping around bogus cached state about your network
> > and re-creating xenbr0 from this ?  Try rm -rf on /var/lib/xend/state
> > and reboot. The only places we reference xenbr0 is in the vif-bridge
> > and qemu-ifup scripts where we do auto-translation from xenbr0 to eth0
> > for back-compatability with old guest configs.
> 
> Oh, I see. In that case I think everything is now fine. Perhaps we should
> leave the xenbr0 references as is then: at least it's clear we're talking
> about a bridge in the contexts where we use it, as opposed to an interface
> for local packet delivery.

The reason we renamed it to 'eth0' in Fedora is so edge closer towards a
single unified network setup that is applicable for any virtualization
tech.  In Fedora 8 we're going to remove network-bridge from the default
config completely and just use regular init scripts for configuring
the bridge. 

eg, have /etc/sysconfig/network-scripts/ifcfg-peth0 defining the physical
interface config thus:

  DEVICE=peth0
  ONBOOT=yes
  BRIDGE=eth0
  HWADDR=XX:XX:XX:XX:XX:XX


And the bridge device config /etc/sysconfig/network-scripts/ifcfg-eth0

  DEVICE=eth0
  BOOTPROTO=dhcp
  ONBOOT=yes
  TYPE=Bridge

This will make it much easier for people who want to use bonding, or VLANs
and any other funky networking config in Dom0, and the same configs will
work for both Xen & KVM. Hence we wanted to have a generic 'eth0' and 'peth0'
rather than 'xenbr0' and 'eth0'. Of course there's plenty of other naming
schemes too, but figured since Xen already had the idea of a 'p' prefix for
identifying a physical device that seemed reasonable to keep.

Regards,
Dan.
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