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Message-ID: <20071015211116.0fc24692@laptopd505.fenrus.org>
Date:	Mon, 15 Oct 2007 21:11:16 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Matthew Wilcox <matthew@....cx>
Cc:	david@...g.hm, Greg KH <greg@...ah.com>,
	Rob Landley <rob@...dley.net>,
	Julian Calaby <julian.calaby@...il.com>,
	Theodore Tso <tytso@....edu>,
	James Bottomley <James.Bottomley@...eleye.com>,
	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 Mon, 15 Oct 2007 22:04:01 -0600
Matthew Wilcox <matthew@....cx> wrote:

> On Mon, Oct 15, 2007 at 07:54:22PM -0700, david@...g.hm wrote:
> > do PCI devices reorder their bus numbers spontaniously, or only if
> > you change the hardware?
> 
> The only system I've had that reordered PCI bus numbers was when I
> had a partitionable system and changed the partitioning.  Not quite
> "change the hardware", but neither was it "spontaneous".  It was
> certainly unexpected (for me).
> 

a very common one is booting your laptop docked (a real dock, not just
a port extender) versus non-docked....
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