Re: [tip:x86/mm] x86/mm/mtrr: Clean up mtrr_type_lookup()

Borislav Petkov
2015-07-31T14:45:20Z

On Fri, Jul 31, 2015 at 03:18:02PM +0200, Peter Zijlstra wrote:
> Using these functions with preemption enabled is racy against MTRR
> updates. And if that race is ok, at the very least explain that it is
> indeed racy and why this is not a problem.

Right, so Luis has been working on burying direct MTRR access so
after that work is done, we'll be using only PAT for changing memory
attributes. Look at arch_phys_wc_add() and all those fbdev users of
mtrr_add() which get converted to that thing...

--
Regards/Gruss,
Boris.

ECO tip #101: Trim your mails when you reply.
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