aboutsummaryrefslogtreecommitdiffstats
path: root/kernel/sched_rt.c
diff options
context:
space:
mode:
authorSteven Rostedt <srostedt@redhat.com>2008-01-25 21:08:07 +0100
committerIngo Molnar <mingo@elte.hu>2008-01-25 21:08:07 +0100
commit4642dafdf93dc7d66ee33437b93a5e6b8cea20d2 (patch)
tree4e3fd9c95be1ed14e9f40b2dcf232c40e5ab8fef /kernel/sched_rt.c
parentsched: pull RT tasks from overloaded runqueues (diff)
downloadlinux-dev-4642dafdf93dc7d66ee33437b93a5e6b8cea20d2.tar.xz
linux-dev-4642dafdf93dc7d66ee33437b93a5e6b8cea20d2.zip
sched: push RT tasks from overloaded CPUs
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 <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to '')
-rw-r--r--kernel/sched_rt.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index bacb32039e95..d38a8a559aa5 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -558,6 +558,15 @@ static void schedule_tail_balance_rt(struct rq *rq)
}
}
+
+static void wakeup_balance_rt(struct rq *rq, struct task_struct *p)
+{
+ if (unlikely(rt_task(p)) &&
+ !task_running(rq, p) &&
+ (p->prio >= rq->curr->prio))
+ push_rt_tasks(rq);
+}
+
/*
* Load-balancing iterator. Note: while the runqueue stays locked
* during the whole iteration, the current task might be
@@ -665,6 +674,7 @@ move_one_task_rt(struct rq *this_rq, int this_cpu, struct rq *busiest,
#else /* CONFIG_SMP */
# define schedule_tail_balance_rt(rq) do { } while (0)
# define schedule_balance_rt(rq, prev) do { } while (0)
+# define wakeup_balance_rt(rq, p) do { } while (0)
#endif /* CONFIG_SMP */
static void task_tick_rt(struct rq *rq, struct task_struct *p)