Re: [tip:x86/mm] x86/mm/mtrr: Clean up mtrr_type_lookup()
From: Borislav Petkov <bp@alien8.de>
Date: 2015-07-31 14:45:20
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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...
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Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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