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Date: Thu, 30 Aug 2007 16:28:16 -0500
To: Joachim Fenkes <FENKES@de.ibm.com>
Subject: Re: [PATCH 2.6.23] ibmebus: Prevent bus_id collisions
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From: linas@austin.ibm.com (Linas Vepstas)
Cc: Thomas Q Klein <tklein@de.ibm.com>, Jan-Bernd Themann <themann@de.ibm.com>,
	Paul Mackerras <pmac@au1.ibm.com>, LKML <linux-kernel@vger.kernel.org>,
	LinuxPPC-Dev <linuxppc-dev@ozlabs.org>,
	Christoph Raisch <raisch@de.ibm.com>,
	Nathan Lynch <ntl@pobox.com>, Paul Mackerras <paulus@samba.org>,
	Stefan Roscher <stefan.roscher@de.ibm.com>
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On Thu, Aug 30, 2007 at 04:00:56PM +0200, Joachim Fenkes wrote:
> 
> Plus, I rather like using 
> the full_name since it also contains a descriptive name as opposed to 
> being just nondescript numbers, helping the layman (ie user) to make sense 
> out of a dev_id.

Yes, well, but no. The location code is useful as a geographical
location: slots and devices are physically labelled with stickers 
so you can tell which is which.  Handy when you have to unplug stuff. 
By contrast, the device-tree full_name is mostly just gobldy-gook, 
with some crazy phb numbering in there that, after four years of 
staring at them, I still can't reliably do anything useful with.  
Location codes are nice. 

--linas