Commit 7c4bb1f9 authored Mar 31, 2006 by Con Kolivas Committed by Linus Torvalds Mar 31, 2006

[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>

parent 5138930e

kernel/sched.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -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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