netdev - Re: PATCH: Network Device Naming mechanism and policy

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Date:	Mon, 12 Oct 2009 14:07:42 -0400
From:	Bill Nottingham <notting@...hat.com>
To:	Greg KH <greg@...ah.com>
Cc:	Matt Domsch <Matt_Domsch@...l.com>,
	Stephen Hemminger <shemminger@...tta.com>,
	netdev@...r.kernel.org, linux-hotplug@...r.kernel.org,
	Narendra_K@...l.com, jordan_hargrave@...l.com
Subject: Re: PATCH: Network Device Naming mechanism and policy

Greg KH (greg@...ah.com) said: 
> > No, it's not solved. Even if you have persistent names once you install,
> > if you ever re-image, you're likely to get *different* persistent names;
> > the first load will always be non-detmerministic.
> > 
> > The only way around this would be to have some sort of screen like:
> > 
> >   Would you like your network devices to be enumerated by
> > 
> >   [ ] MAC address
> >   [ ] PCI device order
> >   [ ] Driver name
> >   [ ] Other
> 
> [ ] PCI slot name
> 
> That's one that modern systems are now reporting, and should solve
> Matt's problem as well, right?

... maybe. On my laptop, the first 'slot' enumerated appears to be
the cardbus bridge, before the on-board ethernet. And on the desktop
next to me, the slot driver shows nothing.

> And I don't see how Matt's proposed patch helps resolve this type of
> issue any better than what we currently have today, do you?

It allows multiple addressing schemes to be active at once, which
can allow the admin to choose post-install without making an
active choice at installation. This is an improvement, even if
it doesn't solve the world.

Bill
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