This patch adds pushing of overloaded RT tasks from a runqueue that is having tasks (most likely RT tasks) added to the run queue. TODO: We don't cover the case of waking of new RT tasks (yet). Signed-off-by: Steven Rostedt --- kernel/sched.c | 2 ++ kernel/sched_rt.c | 12 ++++++++++++ 2 files changed, 14 insertions(+) Index: linux-test.git/kernel/sched_rt.c =================================================================== --- linux-test.git.orig/kernel/sched_rt.c 2007-10-22 22:37:28.000000000 -0400 +++ linux-test.git/kernel/sched_rt.c 2007-10-22 22:38:04.000000000 -0400 @@ -559,9 +559,21 @@ static void schedule_tail_balance_rt(str spin_unlock_irq(&rq->lock); } } + +static void wakeup_balance_rt(struct rq *rq, struct task_struct *p) +{ + if (unlikely(rt_task(p)) && + (p->prio >= rq->curr->prio)) { + /* pull_rt_task needs task to be running */ + p->state = TASK_RUNNING; + push_rt_tasks(rq); + } +} + #else /* CONFIG_SMP */ # define schedule_tail_balance_rt(rq) do { } while (0) # define schedule_balance_rt(rq) do { } while (0) +# define wakeup_balance_rt(rq, p) do { } while (0) #endif /* CONFIG_SMP */ Index: linux-test.git/kernel/sched.c =================================================================== --- linux-test.git.orig/kernel/sched.c 2007-10-22 22:37:28.000000000 -0400 +++ linux-test.git/kernel/sched.c 2007-10-22 22:38:04.000000000 -0400 @@ -22,6 +22,7 @@ * by Peter Williams * 2007-05-06 Interactivity improvements to CFS by Mike Galbraith * 2007-07-01 Group scheduling enhancements by Srivatsa Vaddagiri + * 2007-10-22 RT overload balancing by Steven Rostedt */ #include @@ -1614,6 +1615,7 @@ out_activate: update_rq_clock(rq); activate_task(rq, p, 1); check_preempt_curr(rq, p); + wakeup_balance_rt(rq, p); success = 1; out_running: -- - 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/