[PATCH 1/6] sched: account SCHED_IDLE tasks on rq->idle_nr_running
in [Kernel]
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From: Nikhil Rao on 30 Jul 2010 01:30 Account SCHED_IDLE tasks on rq->idle_nr_running in addition to rq->nr_running. This is a preparatory patch for the SCHED_IDLE load balancer. Signed-off-by: Nikhil Rao <ncrao(a)google.com> --- kernel/sched.c | 15 +++++++++++++++ 1 files changed, 15 insertions(+), 0 deletions(-) diff --git a/kernel/sched.c b/kernel/sched.c index f52a880..26e74e9 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -456,6 +456,7 @@ struct rq { unsigned long nr_running; #define CPU_LOAD_IDX_MAX 5 unsigned long cpu_load[CPU_LOAD_IDX_MAX]; + unsigned long idle_nr_running; #ifdef CONFIG_NO_HZ u64 nohz_stamp; unsigned char in_nohz_recently; @@ -1838,6 +1839,16 @@ static void dec_nr_running(struct rq *rq) rq->nr_running--; } +static void inc_idle_nr_running(struct rq *rq) +{ + rq->idle_nr_running++; +} + +static void dec_idle_nr_running(struct rq *rq) +{ + rq->idle_nr_running--; +} + static void set_load_weight(struct task_struct *p) { if (task_has_rt_policy(p)) { @@ -1885,6 +1896,8 @@ static void activate_task(struct rq *rq, struct task_struct *p, int flags) enqueue_task(rq, p, flags); inc_nr_running(rq); + if (p->policy == SCHED_IDLE) + inc_idle_nr_running(rq); } /* @@ -1897,6 +1910,8 @@ static void deactivate_task(struct rq *rq, struct task_struct *p, int flags) dequeue_task(rq, p, flags); dec_nr_running(rq); + if (p->policy == SCHED_IDLE) + dec_idle_nr_running(rq); } #include "sched_idletask.c" -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |