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Date:	Mon, 29 Jun 2009 18:24:22 -0700
From:	Yinghai Lu <>
To:	"H. Peter Anvin" <>
CC:	Linus Torvalds <>,
	Ingo Molnar <>,
	Mikael Pettersson <>,
	Matthew Wilcox <>,
	Grant Grundler <>,,
Subject: Re: [BUG 2.6.31-rc1] HIGHMEM64G causes hang in PCI init on 32-bit

H. Peter Anvin wrote:
> Yinghai Lu wrote:
>>> That doesn't quite look right; for one thing it doesn't handle the
>>> (admittedly somewhat unlikely) case of end pointing to the end of the
>>> address space.
>>> Something like:
>>> 	if (start > (resource_size_t)end-1)
>>> 		continue;
>> +		if (start > (resource_size_t)end)
>>  			continue;
> Erk... thinko on my part.  Should have been (resource_size_t)-1.

how about start is already 32M ?
you will insert blank one...

64bit, we could expand range that is above 4g to be aligned.

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