Messages in this thread Patch in this message | | | From | Con Kolivas <> | Subject | [PATCH] sched: remove on runqueue requeueing | Date | Wed, 15 Feb 2006 22:41:36 +1100 |
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Andrew please apply. Thanks Mike.
Cheers, Con --- 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>
kernel/sched.c | 3 +-- 1 files changed, 1 insertion(+), 2 deletions(-)
Index: linux-2.6.16-rc3-mm1/kernel/sched.c =================================================================== --- linux-2.6.16-rc3-mm1.orig/kernel/sched.c 2006-02-15 22:29:15.000000000 +1100 +++ linux-2.6.16-rc3-mm1/kernel/sched.c 2006-02-15 22:32:20.000000000 +1100 @@ -3107,8 +3107,7 @@ 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: - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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