linux-kernel - Re: What still uses the block layer?

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Message-Id: <200710150508.37332.rob@landley.net>
Date:	Mon, 15 Oct 2007 05:08:36 -0500
From:	Rob Landley <rob@...dley.net>
To:	"Julian Calaby" <julian.calaby@...il.com>
Cc:	"Theodore Tso" <tytso@....edu>,
	"James Bottomley" <James.Bottomley@...eleye.com>,
	"Matthew Wilcox" <matthew@....cx>, linux-kernel@...r.kernel.org,
	linux-scsi@...r.kernel.org, "Jens Axboe" <axboe@...e.de>,
	"Suparna Bhattacharya" <suparna@...ibm.com>,
	"Nick Piggin" <piggin@...erone.com.au>
Subject: Re: What still uses the block layer?

On Monday 15 October 2007 4:06:20 am Julian Calaby wrote:
> On 10/15/07, Rob Landley <rob@...dley.net> wrote:
> > I note that the eth0 and eth1 names are dynamically assigned on a first
> > come first serve basis (like scsi).  This never causes me a problem
> > because the driver loading order is constant, and once you figure out
> > that eth0 is gigabit and eth1 is the 80211g it _stays_ that way across
> > reboots, reliably. Yeah, it's a heuristic.  Hands up everybody relying on
> > such a heuristic in the real world.
>
> Umm, not quite, from my experiences with pre-production wireless
> drivers, (another story, another time) fancy stuff is being done in
> udev to make sure that your gigabit card is always assigned to eth0.

I remember building a 2.4 kernel, statically linking in all the drivers, and 
getting the ethernet devices showing up in a reliable order for years.  Where 
does the need for fancy stuff come in?

Rob
-- 
"One of my most productive days was throwing away 1000 lines of code."
  - Ken Thompson.
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