Re: [PATCH 1/2] x86: Sanity check the e820 against the SRAT tableusing e820 map only

From: Ingo Molnar
Date: Mon May 11 2009 - 05:37:46 EST



* Yinghai Lu <yinghai@xxxxxxxxxx> wrote:

> - e820ram = max_pfn - absent_pages_in_range(0, max_pfn);
> + e820ram = max_pfn - (e820_hole_size(0, max_pfn<<PAGE_SHIFT)>>PAGE_SHIFT);

btw., it would be nice to have a debug check that prints a warning
if the SRAT does not cover all RAM, or if it covers RAM that is not
present in the e820 map. Such a warning might alert us to double
check all the PXM settings in the SRAT and could uncover more quirks
like the above ...

Ingo
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