diff options
Diffstat (limited to 'kernel/sched/deadline.c')
-rw-r--r-- | kernel/sched/deadline.c | 57 |
1 files changed, 18 insertions, 39 deletions
diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index fffcb1aa77b7..147b757d162b 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -1561,7 +1561,10 @@ static void enqueue_task_dl(struct rq *rq, struct task_struct *p, int flags) * the throttle. */ p->dl.dl_throttled = 0; - BUG_ON(!is_dl_boosted(&p->dl) || flags != ENQUEUE_REPLENISH); + if (!(flags & ENQUEUE_REPLENISH)) + printk_deferred_once("sched: DL de-boosted task PID %d: REPLENISH flag missing\n", + task_pid_nr(p)); + return; } @@ -2861,41 +2864,6 @@ bool dl_param_changed(struct task_struct *p, const struct sched_attr *attr) } #ifdef CONFIG_SMP -int dl_task_can_attach(struct task_struct *p, const struct cpumask *cs_cpus_allowed) -{ - unsigned long flags, cap; - unsigned int dest_cpu; - struct dl_bw *dl_b; - bool overflow; - int ret; - - dest_cpu = cpumask_any_and(cpu_active_mask, cs_cpus_allowed); - - rcu_read_lock_sched(); - dl_b = dl_bw_of(dest_cpu); - raw_spin_lock_irqsave(&dl_b->lock, flags); - cap = dl_bw_capacity(dest_cpu); - overflow = __dl_overflow(dl_b, cap, 0, p->dl.dl_bw); - if (overflow) { - ret = -EBUSY; - } else { - /* - * We reserve space for this task in the destination - * root_domain, as we can't fail after this point. - * We will free resources in the source root_domain - * later on (see set_cpus_allowed_dl()). - */ - int cpus = dl_bw_cpus(dest_cpu); - - __dl_add(dl_b, p->dl.dl_bw, cpus); - ret = 0; - } - raw_spin_unlock_irqrestore(&dl_b->lock, flags); - rcu_read_unlock_sched(); - - return ret; -} - int dl_cpuset_cpumask_can_shrink(const struct cpumask *cur, const struct cpumask *trial) { @@ -2917,7 +2885,7 @@ int dl_cpuset_cpumask_can_shrink(const struct cpumask *cur, return ret; } -bool dl_cpu_busy(unsigned int cpu) +int dl_cpu_busy(int cpu, struct task_struct *p) { unsigned long flags, cap; struct dl_bw *dl_b; @@ -2927,11 +2895,22 @@ bool dl_cpu_busy(unsigned int cpu) dl_b = dl_bw_of(cpu); raw_spin_lock_irqsave(&dl_b->lock, flags); cap = dl_bw_capacity(cpu); - overflow = __dl_overflow(dl_b, cap, 0, 0); + overflow = __dl_overflow(dl_b, cap, 0, p ? p->dl.dl_bw : 0); + + if (!overflow && p) { + /* + * We reserve space for this task in the destination + * root_domain, as we can't fail after this point. + * We will free resources in the source root_domain + * later on (see set_cpus_allowed_dl()). + */ + __dl_add(dl_b, p->dl.dl_bw, dl_bw_cpus(cpu)); + } + raw_spin_unlock_irqrestore(&dl_b->lock, flags); rcu_read_unlock_sched(); - return overflow; + return overflow ? -EBUSY : 0; } #endif |