From 9a82782f8f58219d0c6dc5f0211ce301adf6c6f4 Mon Sep 17 00:00:00 2001
From: Joshua N Pritikin <jpritikin@pobox.com>
Date: Sun, 6 May 2007 14:49:07 -0700
Subject: [PATCH] allow oom_adj of saintly processes

If the badness of a process is zero then oom_adj>0 has no effect.  This
patch makes sure that the oom_adj shift actually increases badness points
appropriately.

Signed-off-by: Joshua N. Pritikin <jpritikin@pobox.com>
Cc: Andrea Arcangeli <andrea@novell.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/oom_kill.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 3791edfffeeb..a35e7a8ebd7e 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -147,9 +147,11 @@ unsigned long badness(struct task_struct *p, unsigned long uptime)
 	 * Adjust the score by oomkilladj.
 	 */
 	if (p->oomkilladj) {
-		if (p->oomkilladj > 0)
+		if (p->oomkilladj > 0) {
+			if (!points)
+				points = 1;
 			points <<= p->oomkilladj;
-		else
+		} else
 			points >>= -(p->oomkilladj);
 	}
 
-- 
2.20.1