linux-kernel - [PATCH 3/3] mm: print information when THP is disabled automatically

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Date:	Tue, 21 Jun 2011 00:34:30 +0800
From:	Amerigo Wang <amwang@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, Amerigo Wang <amwang@...hat.com>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <jweiner@...hat.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	linux-mm@...ck.org
Subject: [PATCH 3/3] mm: print information when THP is disabled automatically

Print information when THP is disabled automatically so that
users can find this info in dmesg.

Signed-off-by: WANG Cong <amwang@...hat.com>
---
 mm/huge_memory.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 7fb44cc..07679da 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -544,8 +544,11 @@ static int __init hugepage_init(void)
 	 * 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 < (CONFIG_TRANSPARENT_HUGEPAGE_THRESHOLD << (20 - PAGE_SHIFT)))
+	if (totalram_pages < (CONFIG_TRANSPARENT_HUGEPAGE_THRESHOLD
+					<< (20 - PAGE_SHIFT))) {
+		printk(KERN_INFO "hugepage: disabled auotmatically\n");
 		transparent_hugepage_flags = 0;
+	}
 
 	start_khugepaged();
 
-- 
1.7.4.4

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