diff options
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index a8a73b8897bf..cde573d3f12e 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2586,24 +2586,28 @@ static inline void schedule_debug(struct task_struct *prev) static inline struct task_struct * pick_next_task(struct rq *rq, struct task_struct *prev) { - const struct sched_class *class; + const struct sched_class *class = &fair_sched_class; struct task_struct *p; /* * Optimization: we know that if all tasks are in * the fair class we can call that function directly: */ - if (likely(prev->sched_class == &fair_sched_class && + if (likely(prev->sched_class == class && rq->nr_running == rq->cfs.h_nr_running)) { p = fair_sched_class.pick_next_task(rq, prev); - if (likely(p)) + if (likely(p && p != RETRY_TASK)) return p; } +again: for_each_class(class) { p = class->pick_next_task(rq, prev); - if (p) + if (p) { + if (unlikely(p == RETRY_TASK)) + goto again; return p; + } } BUG(); /* the idle class will always have a runnable task */ |