From 4ee30f8efc5a081d67ceede3884d14bace3fc28a Mon Sep 17 00:00:00 2001
From: Rik van Riel <riel@redhat.com>
Date: Thu, 13 Jan 2011 15:47:12 -0800
Subject: [PATCH] --- yaml --- r: 230803 b: refs/heads/master c:
 97562cd243298acf573620c764a1037bd545c9bc h: refs/heads/master i:   230801:
 b3b00d5f9ada4643aeb44c3ec7e0064bd38e2dcf   230799:
 566a5d333ee1c8c54ecac09d3f346c7bba31ac53 v: v3

---
 [refs]                 | 2 +-
 trunk/mm/huge_memory.c | 8 ++++++++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/[refs] b/[refs]
index 046d381fd559..3b79ddad865f 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: c5a73c3d55be1faadba35b41a862e036a3b12ddb
+refs/heads/master: 97562cd243298acf573620c764a1037bd545c9bc
diff --git a/trunk/mm/huge_memory.c b/trunk/mm/huge_memory.c
index 45b6d53bcfbc..892d8a17a7e5 100644
--- a/trunk/mm/huge_memory.c
+++ b/trunk/mm/huge_memory.c
@@ -527,6 +527,14 @@ static int __init hugepage_init(void)
 		goto out;
 	}
 
+	/*
+	 * By default disable transparent hugepages on smaller systems,
+	 * where the extra memory used could hurt more than TLB overhead
+	 * is likely to save.  The admin can still enable it through /sys.
+	 */
+	if (totalram_pages < (512 << (20 - PAGE_SHIFT)))
+		transparent_hugepage_flags = 0;
+
 	start_khugepaged();
 
 	set_recommended_min_free_kbytes();