[patch 7/8] wake up balance RT
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2007-10-19 18:44:32
Also in:
lkml
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 <rostedt@goodmis.org> --- kernel/sched.c | 1 + kernel/sched_rt.c | 12 ++++++++++++ 2 files changed, 13 insertions(+) Index: linux-test.git/kernel/sched_rt.c ===================================================================
--- linux-test.git.orig/kernel/sched_rt.c 2007-10-19 12:36:05.000000000 -0400
+++ linux-test.git/kernel/sched_rt.c 2007-10-19 12:36:07.000000000 -0400@@ -512,9 +512,21 @@ 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_balance_rt(rq) do { } while (0) # define schedule_tail_balance_rt(rq) do { } while (0) +# define wakeup_balance_rt(rq, p) do { } while (0) #endif /* CONFIG_SMP */ static void put_prev_task_rt(struct rq *rq, struct task_struct *p)
Index: linux-test.git/kernel/sched.c ===================================================================
--- linux-test.git.orig/kernel/sched.c 2007-10-19 12:36:05.000000000 -0400
+++ linux-test.git/kernel/sched.c 2007-10-19 12:36:07.000000000 -0400@@ -1609,6 +1609,7 @@ 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:
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