From: Andrea Arcangeli <aarcange@redhat.com>
Date: Thu, 13 Jan 2011 23:46:39 +0000 (-0800)
Subject: thp: CONFIG_TRANSPARENT_HUGEPAGE
X-Git-Tag: v2.6.38-rc1~157
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4c76d9d1fb9b21fa10c9e4c1fab2875018a88aa1;p=platform%2Fupstream%2Fkernel-adaptation-pc.git

thp: CONFIG_TRANSPARENT_HUGEPAGE

Add config option.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/Kconfig b/mm/Kconfig
index c2c8a4a..3982be2 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -302,6 +302,20 @@ config NOMMU_INITIAL_TRIM_EXCESS
 
 	  See Documentation/nommu-mmap.txt for more information.
 
+config TRANSPARENT_HUGEPAGE
+	bool "Transparent Hugepage Support" if EMBEDDED
+	depends on X86_64 && MMU
+	default y
+	help
+	  Transparent Hugepages allows the kernel to use huge pages and
+	  huge tlb transparently to the applications whenever possible.
+	  This feature can improve computing performance to certain
+	  applications by speeding up page faults during memory
+	  allocation, by reducing the number of tlb misses and by speeding
+	  up the pagetable walking.
+
+	  If memory constrained on embedded, you may want to say N.
+
 #
 # UP and nommu archs use km based percpu allocator
 #