Re: [git pull] x86 PAT changes

[H. Peter Anvin]

Linus Torvalds wrote:
> So why is PAT dependent on NONPROMISC_DEVMEM here?
>
> It seems pointless and wrong. Somebody might want to have both the full 
> /dev/mem and PAT.

The problem is that that can create cached/uncached aliases, which can 
cause some processors to lock up (especially AMD is known to have a lot 
of errata in this area.)

	-hpa
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