Messages in this thread | | | Date | Fri, 31 Jul 2015 16:44:52 +0200 | From | Borislav Petkov <> | Subject | Re: [tip:x86/mm] x86/mm/mtrr: Clean up mtrr_type_lookup() |
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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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