Messages in this thread | | | Date | Mon, 24 Jun 2013 13:08:08 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [RFC 2/2] x86_64, mm: Reinsert the absent memory |
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On 06/24/2013 12:39 PM, Ingo Molnar wrote: > > That might be a bit too granular: if we hit such an uninitialized block of > memory we'd have to process 262,144 pages - potentially from an IRQ > handler that does GFP_ATOMIC... or other latency critical code. > > With 2MB we'd have to on-demand initialize 512 pages, which shouldn't show > up during normal use. >
No... you split the gigabyte page into 511 2M pages and 512 4K pages.
-hpa
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