Re: [PATCH 1/1] x86, e820: Remove direct mapping of reserved spacefor HT hole around 1TB

[H. Peter Anvin]

On 10/11/2011 03:09 PM, Jacob Shin wrote:
> The entire HT hole and also the unused address range before that hole
> need to be excluded from direct mapping. Otherwise speculative
> accesses to that reserved region can happen which cause machine
> checks.

BARF!

This is completely insane ad hockery when all that really should need to 
happen is marking the HT region RESERVED, which should be possible on 
any HT-equipped processor.

	-hpa

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