Re: What still uses the block layer?

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On Mon, Oct 15, 2007 at 10:04:01PM -0600, Matthew Wilcox wrote:
> On Mon, Oct 15, 2007 at 07:54:22PM -0700, david@xxxxxxx 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).
> 
> Greg probably has quite different examples.

Changing the hardware (adding a new PCI device or removing one) are the
most common times this happens.  But I have seen reports of this
happening when you upgrade/downgrade BIOS versions, and, in some
oops-we-messed-up cases, when we changed things in the kernel.

thanks,

greg k-h
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