diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched/core.c | 5 | ||||
| -rw-r--r-- | kernel/sched/deadline.c | 10 | ||||
| -rw-r--r-- | kernel/sched/fair.c | 15 | ||||
| -rw-r--r-- | kernel/sched/sched.h | 2 |
4 files changed, 20 insertions, 12 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 0a7251678982..084d17f89139 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3685,7 +3685,7 @@ SYSCALL_DEFINE3(sched_setattr, pid_t, pid, struct sched_attr __user *, uattr, if (retval) return retval; - if (attr.sched_policy < 0) + if ((int)attr.sched_policy < 0) return -EINVAL; rcu_read_lock(); @@ -7751,8 +7751,7 @@ static int tg_set_cfs_bandwidth(struct task_group *tg, u64 period, u64 quota) /* restart the period timer (if active) to handle new period expiry */ if (runtime_enabled && cfs_b->timer_active) { /* force a reprogram */ - cfs_b->timer_active = 0; - __start_cfs_bandwidth(cfs_b); + __start_cfs_bandwidth(cfs_b, true); } raw_spin_unlock_irq(&cfs_b->lock); diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c index 800e99b99075..14bc348ba3b4 100644 --- a/kernel/sched/deadline.c +++ b/kernel/sched/deadline.c @@ -513,9 +513,17 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer *timer) struct sched_dl_entity, dl_timer); struct task_struct *p = dl_task_of(dl_se); - struct rq *rq = task_rq(p); + struct rq *rq; +again: + rq = task_rq(p); raw_spin_lock(&rq->lock); + if (rq != task_rq(p)) { + /* Task was moved, retrying. */ + raw_spin_unlock(&rq->lock); + goto again; + } + /* * We need to take care of a possible races here. In fact, the * task might have changed its scheduling policy to something diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 0fdb96de81a5..8cbe2d2c16de 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -1707,18 +1707,19 @@ no_join: void task_numa_free(struct task_struct *p) { struct numa_group *grp = p->numa_group; - int i; void *numa_faults = p->numa_faults_memory; + unsigned long flags; + int i; if (grp) { - spin_lock_irq(&grp->lock); + spin_lock_irqsave(&grp->lock, flags); for (i = 0; i < NR_NUMA_HINT_FAULT_STATS * nr_node_ids; i++) grp->faults[i] -= p->numa_faults_memory[i]; grp->total_faults -= p->total_numa_faults; list_del(&p->numa_entry); grp->nr_tasks--; - spin_unlock_irq(&grp->lock); + spin_unlock_irqrestore(&grp->lock, flags); rcu_assign_pointer(p->numa_group, NULL); put_numa_group(grp); } @@ -3129,7 +3130,7 @@ static int assign_cfs_rq_runtime(struct cfs_rq *cfs_rq) */ if (!cfs_b->timer_active) { __refill_cfs_bandwidth_runtime(cfs_b); - __start_cfs_bandwidth(cfs_b); + __start_cfs_bandwidth(cfs_b, false); } if (cfs_b->runtime > 0) { @@ -3308,7 +3309,7 @@ static void throttle_cfs_rq(struct cfs_rq *cfs_rq) raw_spin_lock(&cfs_b->lock); list_add_tail_rcu(&cfs_rq->throttled_list, &cfs_b->throttled_cfs_rq); if (!cfs_b->timer_active) - __start_cfs_bandwidth(cfs_b); + __start_cfs_bandwidth(cfs_b, false); raw_spin_unlock(&cfs_b->lock); } @@ -3690,7 +3691,7 @@ static void init_cfs_rq_runtime(struct cfs_rq *cfs_rq) } /* requires cfs_b->lock, may release to reprogram timer */ -void __start_cfs_bandwidth(struct cfs_bandwidth *cfs_b) +void __start_cfs_bandwidth(struct cfs_bandwidth *cfs_b, bool force) { /* * The timer may be active because we're trying to set a new bandwidth @@ -3705,7 +3706,7 @@ void __start_cfs_bandwidth(struct cfs_bandwidth *cfs_b) cpu_relax(); raw_spin_lock(&cfs_b->lock); /* if someone else restarted the timer then we're done */ - if (cfs_b->timer_active) + if (!force && cfs_b->timer_active) return; } diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 456e492a3dca..369b4d663c42 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -278,7 +278,7 @@ extern void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b); extern int sched_group_set_shares(struct task_group *tg, unsigned long shares); extern void __refill_cfs_bandwidth_runtime(struct cfs_bandwidth *cfs_b); -extern void __start_cfs_bandwidth(struct cfs_bandwidth *cfs_b); +extern void __start_cfs_bandwidth(struct cfs_bandwidth *cfs_b, bool force); extern void unthrottle_cfs_rq(struct cfs_rq *cfs_rq); extern void free_rt_sched_group(struct task_group *tg); |