Re: [PATCH] x86/pci: make pci_mem_start to be aligned only -v3

[Ingo Molnar]

* H. Peter Anvin <hpa@xxxxxxxxx> wrote:

> Yinghai Lu wrote:
> > 
> > that need to do done much earlier, and much simple, just need to make that range to be reserved in e820.
> > and later e820_setup_gap even don't need to be aligned again.
> > 
> 
> As long as that doesn't cause the PCI layer to move devices 
> already assigned in this range out of it.  What we want is really 
> a "weak reserve".  On the other hand, that may very well be the 
> semantics of the existing reserved space, too (I honestly haven't 
> looked lately.)

We have reserve_region_with_split(), which 'wraps around' existing 
resources non-intrusively by creating split-up resources - 
preventing their forced reallocation (and preventing their possible 
breakage - a number of BARs dont like dynamic reallocations at all).

	Ingo
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