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 @@
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
#