Re: acpi based pci gap calculation - v3

From: Jesse Barnes
Date: Wed Jul 16 2008 - 20:03:45 EST

On Wednesday, July 16, 2008 9:33 am Andi Kleen wrote:
> > The only problem there is that linux-next doesn't get nearly the sort of
> > testing coverage we need for this kind of change.
> Normally I tend to wait for one -mm release, which seems to be tested
> by a reasonable number of people. If it survives that it is good
> to be tested in Linus' tree.
> Just stuffing this in in literally the last minute doesn't seem
> like a good idea.

Well it's hardly last minute given that the merge window only opened a couple
of days ago...

But beyond that, now that I've thought about it a bit more I'm not even sure
the patch is really correct (though it works on my test machines). Shouldn't
we be looking at _PRS not _CRS? And ideally we should try to find even more
space, not less. This patch made one of my machines lose quite a bit of

Allocating PCI resources starting at c0000000 (gap: bf000000:40f00000)
ACPI: PCI resources should start at c0000000 (gap: bf000000:31000000)

which is a step backwards. With that in mind, I reverted the patch before
asking Linus to pull; I'm hopeful we can do better though. I'd love to never
see "resource allocation failed" messages anymore.

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