linux-kernel - [PATCH -mmotm] mm: setup_per_zone_inactive_ratio

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Date:	Tue, 5 May 2009 10:07:33 +0400
From:	Cyrill Gorcunov <gorcunov@...nvz.org>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	David Rientjes <rientjes@...gle.com>
Cc:	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH -mmotm] mm: setup_per_zone_inactive_ratio - do not call for
	int_sqrt if not needed

int_sqrt returns 0 iif argument is zero so call it if only needed.

Signed-off-by: Cyrill Gorcunov <gorcunov@...nvz.org>
---
 mm/page_alloc.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Index: linux-2.6.git/mm/page_alloc.c
=====================================================================
--- linux-2.6.git.orig/mm/page_alloc.c
+++ linux-2.6.git/mm/page_alloc.c
@@ -4553,8 +4553,9 @@ static void setup_per_zone_inactive_rati
 
 		/* 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;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/