Re: [GIT PULL] Additional x86 fixes for v3.8-rc1

From: H. Peter Anvin
Date: Wed Dec 19 2012 - 16:34:27 EST

Well, A20 has been done inside the caches since 486, usually in the TLB. Nehalem finally killed off A20M.

You're not the only one surprised by this...

Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote:

>On Wed, Dec 19, 2012 at 12:22 PM, H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
>> x86, 8042: Enable A20 using KBC to fix S3 resume on some MSI
>Christ really? What century are we in? There are still machines that
>have A20 disabled at all, much less externally? How do they even do
>that these days, afaik the CPU caches can't handle the fake aliasing
>Anyway, pulled, I just wanted to express my surprise..
> Linus

Sent from my mobile phone. Please excuse brevity and lack of formatting.
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