linux-kernel - [PATCH] mm: print out memmap number only it is not zero

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Date:	Mon, 03 Nov 2008 17:39:54 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: [PATCH] mm: print out memmap number only it is not zero


Impact: cleanup

not print out for non used zone on nodes other than node0

Signed-off-by: Yinghai Lu <yinghai@...nel.org>

---
 mm/page_alloc.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

Index: linux-2.6/mm/page_alloc.c
===================================================================
--- linux-2.6.orig/mm/page_alloc.c
+++ linux-2.6/mm/page_alloc.c
@@ -3451,9 +3451,10 @@ static void __paginginit free_area_init_
 			PAGE_ALIGN(size * sizeof(struct page)) >> PAGE_SHIFT;
 		if (realsize >= memmap_pages) {
 			realsize -= memmap_pages;
-			printk(KERN_DEBUG
-				"  %s zone: %lu pages used for memmap\n",
-				zone_names[j], memmap_pages);
+			if (memmap_pages)
+				printk(KERN_DEBUG
+				       "  %s zone: %lu pages used for memmap\n",
+				       zone_names[j], memmap_pages);
 		} else
 			printk(KERN_WARNING
 				"  %s zone: %lu pages exceeds realsize %lu\n",
--
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