From: Yinghai Lu <yinghai@kernel.org>
Date: Sun, 26 Jan 2014 21:01:42 +0000 (-0800)
Subject: x86/mm: Avoid duplicated pxm_to_node() calls
X-Git-Tag: v3.15-rc1~159^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ba6a328f7dfc95b20df5e0eb33c698187e997190;p=pandora-kernel.git

x86/mm: Avoid duplicated pxm_to_node() calls

In slit init code, too many pxm_to_node() function calls are done.

We can store from_node/to_node instead of keep calling
pxm_to_node().

  - Before this patch: pxm_to_node() is called n*(1+n*3) times.
  - After  this patch: pxm_to_node() is called n*(1+n) times.

for  8 sockets, it will be   72 instead of  200.
for 32 sockets, it will be 1056 instead of 3104.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Toshi Kani <toshi.kani@hp.com>
Cc: David Rientjes <rientjes@google.com>
Link: http://lkml.kernel.org/r/1390770102-4007-1-git-send-email-yinghai@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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