Cc: Ingo Molnar <mingo@...>, Rafael J. Wysocki <rjw@...>, Andrew Morton <akpm@...>, LKML <linux-kernel@...>, Pavel Machek <pavel@...>, Thomas Gleixner <tglx@...>, H. Anvin <hpa@...>, Arjan van de Ven <arjan@...>, Greg Kroah-Hartman <gregkh@...>
On Sun, Apr 13, 2008 at 11:29 AM, Andi Kleen <andi@firstfloor.org> wrote:
it does fix real problem. when big system with several HT links, and
every link some pcie slots.
you fully load pci-e cards (with pci bridge). BIOS will stop assign
io/mmio resource to left device if it run out of io port range.
(though it is supposed to go on to allocate mmio to left devices) (
modern pcie device only need mmio with drivers)
With pre set range allocation in NB pci conf, kernel could allocate
the resource in every peer root bus ranges.
(the code for assign resource to device that is not assigned resource
by BIOS --- already in kernel)
YH
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