This patch adds accounting to keep track of the number of RT tasks running on a runqueue. This information will be used in later patches. Signed-off-by: Steven Rostedt --- kernel/sched.c | 2 ++ kernel/sched_rt.c | 18 ++++++++++++++++++ 2 files changed, 20 insertions(+) Index: linux-test.git/kernel/sched.c =================================================================== --- linux-test.git.orig/kernel/sched.c 2007-10-19 12:32:39.000000000 -0400 +++ linux-test.git/kernel/sched.c 2007-10-19 12:33:09.000000000 -0400 @@ -300,6 +300,8 @@ struct rq { */ unsigned long nr_uninterruptible; + unsigned long rt_nr_running; + struct task_struct *curr, *idle; unsigned long next_balance; struct mm_struct *prev_mm; Index: linux-test.git/kernel/sched_rt.c =================================================================== --- linux-test.git.orig/kernel/sched_rt.c 2007-10-19 12:31:08.000000000 -0400 +++ linux-test.git/kernel/sched_rt.c 2007-10-19 12:33:09.000000000 -0400 @@ -25,12 +25,28 @@ static void update_curr_rt(struct rq *rq curr->se.exec_start = rq->clock; } +static inline void inc_rt_tasks(struct task_struct *p, struct rq *rq) +{ + if (rt_task(p)) + rq->rt_nr_running++; +} + +static inline void dec_rt_tasks(struct task_struct *p, struct rq *rq) +{ + if (rt_task(p)) { + WARN_ON(!rq->rt_nr_running); + rq->rt_nr_running--; + } +} + static void enqueue_task_rt(struct rq *rq, struct task_struct *p, int wakeup) { struct rt_prio_array *array = &rq->rt.active; list_add_tail(&p->run_list, array->queue + p->prio); __set_bit(p->prio, array->bitmap); + + inc_rt_tasks(p, rq); } /* @@ -42,6 +58,8 @@ static void dequeue_task_rt(struct rq *r update_curr_rt(rq); + dec_rt_tasks(p, rq); + list_del(&p->run_list); if (list_empty(array->queue + p->prio)) __clear_bit(p->prio, array->bitmap); -- - 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/