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[PATCH] sched: remove on runqueue requeueing

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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>
This commit is contained in:
Con Kolivas 2006-03-31 02:31:29 -08:00 committed by Linus Torvalds
parent 5138930e6a
commit 7c4bb1f9b3
1 changed files with 1 additions and 2 deletions
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3
kernel/sched.c
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@ -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: