Messages in this thread | | | Date | Thu, 13 Dec 2012 00:05:05 +0200 | From | "Kirill A. Shutemov" <> | Subject | Re: [PATCH v5 09/11] thp: lazy huge zero page allocation |
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On Wed, Dec 12, 2012 at 01:48:04PM -0800, H. Peter Anvin wrote: > On 12/12/2012 01:30 PM, Andrew Morton wrote: > >> > >> I can rewrite the check to static_key if you want. Would it be better? > > > > The new test-n-branch only happens on the first read fault against a > > thp huge page, yes? In which case it's a quite infrequent event and I > > suspect this isn't worth bothering about. > > > > Not to mention that flipping the static key is *incredibly* expensive.
I'm fine with current code.
-- Kirill A. Shutemov [unhandled content-type:application/pgp-signature] | |