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
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