On 12/12/2012 01:30 PM, Andrew Morton wrote:

quoted

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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