Re: [PATCH] x86: fixed mtrr change WP to WB

[H. Peter Anvin]

Yinghai Lu wrote:
> [PATCH] x86: fixed mtrr change WP to WB
>
> so we modify mptable near below 1M
>
> Signed-off-by: Yinghai Lu <yhlu.kernel@xxxxxxxxx>

Again:

This does not work on even the majority of all systems.

If the mptable should be modified, it should be copied to kernel memory 
and modified there.  Modifying it in-place is both unsafe and, in 
general, simply will not work.

Sorry.

NAK on this whole set.

	-hpa
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