Re: PCI card initialisation at boot

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From: Matt Domsch
Date: Sunday, November 11, 2007 - 4:43 pm

On Sun, Nov 11, 2007 at 04:46:44PM +0000, Alan Cox wrote:

Slightly tangential, but I'm starting to hear requests to have the OS
re-assign resources when it might make better sense.  For example, if
you have a graphics card with a 1GB memory allocation, the BIOS may
assign it into address ranges below 4GB because it doesn't know
if the OS will be 32-bit or 64-bit capable.  But, it would be
beneficial to have it located above 4GB, and to fill in the (new) hole
below 4GB with RAM.  Linux right now doesn't have a way to do this.
It will assign resources for cards that the BIOS left unassigned, but
won't intentionally move resources.


-- 
Matt Domsch
Linux Technology Strategist, Dell Office of the CTO
linux.dell.com & www.dell.com/linux
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Messages in current thread:
PCI card initialisation at boot, Keith Chew, (Sun Nov 11, 8:22 am)
Re: PCI card initialisation at boot, Andi Kleen, (Sun Nov 11, 9:11 am)
Re: PCI card initialisation at boot, Alan Cox, (Sun Nov 11, 9:46 am)
Re: PCI card initialisation at boot, Matt Domsch, (Sun Nov 11, 4:43 pm)
Re: PCI card initialisation at boot, H. Peter Anvin, (Sun Nov 11, 5:22 pm)