Re: [Lse-tech] [RFC] numa slab for 2.5.41-mm1

From: David S. Miller (
Date: Tue Oct 08 2002 - 19:50:04 EST

   From: "Luck, Tony" <>
   Date: Tue, 8 Oct 2002 16:29:45 -0700
   If ptr_to_nodeid() is made a platform dependent function, then
   there are some platforms that can do this very efficiently (since
   the nodeid is embedded in some of the high-order address bits), and
   some for which this is complex (e.g. platforms that concatenate
   memory from each node).

I suggest to do it like this, provide the portable version unless some
"HAVE_ARCH_PTR_TO_NODEID" CCP macro is defined in which case the
architecture can make the "address bits" optimization or similar.

The is how we usually handle such things.
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