From: Cyrill Gorcunov <gorcunov@openvz.org>
Date: Tue, 16 Jun 2009 22:32:32 +0000 (-0700)
Subject: mm: setup_per_zone_inactive_ratio - do not call for int_sqrt if not needed
X-Git-Tag: v2.6.31-rc1~299^2~120
X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=5c87eada68fe5d29a5f67528f81b6e45124f579b;p=~shefty%2Frdma-dev.git

mm: setup_per_zone_inactive_ratio - do not call for int_sqrt if not needed

int_sqrt() returns 0 if its argument is zero so call it if only needed.

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e5b8f628d16..db8c46ffa9f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4471,8 +4471,9 @@ static void setup_per_zone_inactive_ratio(void)
 
 		/* Zone size in gigabytes */
 		gb = zone->present_pages >> (30 - PAGE_SHIFT);
-		ratio = int_sqrt(10 * gb);
-		if (!ratio)
+		if (gb)
+			ratio = int_sqrt(10 * gb);
+		else
 			ratio = 1;
 
 		zone->inactive_ratio = ratio;