Messages in this thread | | | Date | Wed, 12 Dec 2012 13:48:04 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH v5 09/11] thp: lazy huge zero page allocation |
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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.
-hpa
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