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

[H. Peter Anvin]

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>
>wrote:
>>       x86, 8042: Enable A20 using KBC to fix S3 resume on some MSI
>laptops
>
>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..
>
>Anyway, pulled, I just wanted to express my surprise..
>
>          Linus

-- 
Sent from my mobile phone. Please excuse brevity and lack of formatting.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/