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>

1 files changed, 14 insertions, 0 deletions

diff --git a/mm/Kconfig b/mm/Kconfig
index c2c8a4a11898..3982be2d721a 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
 #