diff options
Diffstat (limited to 'kernel/sched_rt.c')
| -rw-r--r-- | kernel/sched_rt.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c index 95f36f61ae1..ac7d0678645 100644 --- a/kernel/sched_rt.c +++ b/kernel/sched_rt.c @@ -151,8 +151,27 @@ yield_task_rt(struct rq *rq) } #ifdef CONFIG_SMP +static int find_lowest_rq(struct task_struct *task); + static int select_task_rq_rt(struct task_struct *p, int sync) { + struct rq *rq = task_rq(p); + + /* + * If the task will not preempt the RQ, try to find a better RQ + * before we even activate the task + */ + if ((p->prio >= rq->rt.highest_prio) + && (p->nr_cpus_allowed > 1)) { + int cpu = find_lowest_rq(p); + + return (cpu == -1) ? task_cpu(p) : cpu; + } + + /* + * Otherwise, just let it ride on the affined RQ and the + * post-schedule router will push the preempted task away + */ return task_cpu(p); } #endif /* CONFIG_SMP */ |