From 7c4bb1f9b3788309e1159961c606ba0bdf7ed382 Mon Sep 17 00:00:00 2001
From: Con Kolivas
Date: Fri, 31 Mar 2006 02:31:29 -0800
Subject: [PATCH] sched: remove on runqueue requeueing

On runqueue time is used to elevate priority in schedule().

In the code it currently requeues tasks even if their priority is not
elevated, which would end up placing them at the end of their runqueue
array effectively delaying them instead of improving their priority.

Bug spotted by Mike Galbraith <efault@gmx.de>

This patch removes this requeueing.

Signed-off-by: Con Kolivas <kernel@kolivas.org>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 kernel/sched.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'kernel')

diff --git a/kernel/sched.c b/kernel/sched.c
index 3055fe806ff7..73bb4d9ef989 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3023,8 +3023,7 @@ go_idle:
 			dequeue_task(next, array);
 			next->prio = new_prio;
 			enqueue_task(next, array);
-		} else
-			requeue_task(next, array);
+		}
 	}
 	next->sleep_type = SLEEP_NORMAL;
 switch_tasks:
-- 
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