tree 14a5f3ba3ee5915e890a08c4c37216869700b756
parent deac4ee65af4befb66b542e4a782e63da93b51a0
author Dmitry Adamushko <dmitry.adamushko@gmail.com> 1187980750 +0200
committer Ingo Molnar <mingo@elte.hu> 1187980750 +0200

sched: optimize task_tick_rt() a bit

Mitchell Erblich suggested a quality-of-implementation change to
not requeue SCHED_RR tasks if there's only a single task on the
runqueue, by checking for rq->nr_running == 1.

provide a more efficient implementation of that, to check that
particular RT priority-queue only.

[ From: mingo@elte.hu ]

Also first requeue the task then set need_resched - results in slightly
better machine-instruction ordering. Also clean up the code a bit.

Signed-off-by: Dmitry Adamushko <dmitry.adamushko@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>