thp: CONFIG_TRANSPARENT_HUGEPAGE

Add config option. Signed-off-by: Andrea Arcangeli <[email protected]> Acked-by: Rik van Riel <[email protected]> Acked-by: Mel Gorman <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
oohal · Jan 14, 2011 · 4c76d9d · 4c76d9d
1 parent 59ff421
commit 4c76d9d
Showing 1 changed file with 14 additions and 0 deletions.
diff --git 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
 #