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Merge branch 'linus' into timers/core

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Make sure the upstream fixes are applied before adding further
modifications.
This commit is contained in:
Thomas Gleixner
2015-05-19 16:12:32 +02:00
parent daa67b4b70 e26081808e
commit c3b5d3cea5
3182 changed files with 109019 additions and 66067 deletions
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69
kernel/sched/core.c
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@@ -995,13 +995,6 @@ void check_preempt_curr(struct rq *rq, struct task_struct *p, int flags)
rq_clock_skip_update(rq, true);
}
static ATOMIC_NOTIFIER_HEAD(task_migration_notifier);
void register_task_migration_notifier(struct notifier_block *n)
{
atomic_notifier_chain_register(&task_migration_notifier, n);
}
#ifdef CONFIG_SMP
void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
{
@@ -1032,18 +1025,10 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
trace_sched_migrate_task(p, new_cpu);
if (task_cpu(p) != new_cpu) {
struct task_migration_notifier tmn;
if (p->sched_class->migrate_task_rq)
p->sched_class->migrate_task_rq(p, new_cpu);
p->se.nr_migrations++;
perf_sw_event_sched(PERF_COUNT_SW_CPU_MIGRATIONS, 1, 0);
tmn.task = p;
tmn.from_cpu = task_cpu(p);
tmn.to_cpu = new_cpu;
atomic_notifier_call_chain(&task_migration_notifier, 0, &tmn);
}
__set_task_cpu(p, new_cpu);
@@ -3294,15 +3279,18 @@ static void __setscheduler_params(struct task_struct *p,
/* Actually do priority change: must hold pi & rq lock. */
static void __setscheduler(struct rq *rq, struct task_struct *p,
const struct sched_attr *attr)
const struct sched_attr *attr, bool keep_boost)
{
__setscheduler_params(p, attr);
/*
* If we get here, there was no pi waiters boosting the
* task. It is safe to use the normal prio.
* Keep a potential priority boosting if called from
* sched_setscheduler().
*/
p->prio = normal_prio(p);
if (keep_boost)
p->prio = rt_mutex_get_effective_prio(p, normal_prio(p));
else
p->prio = normal_prio(p);
if (dl_prio(p->prio))
p->sched_class = &dl_sched_class;
@@ -3402,7 +3390,7 @@ static int __sched_setscheduler(struct task_struct *p,
int newprio = dl_policy(attr->sched_policy) ? MAX_DL_PRIO - 1 :
MAX_RT_PRIO - 1 - attr->sched_priority;
int retval, oldprio, oldpolicy = -1, queued, running;
int policy = attr->sched_policy;
int new_effective_prio, policy = attr->sched_policy;
unsigned long flags;
const struct sched_class *prev_class;
struct rq *rq;
@@ -3584,15 +3572,14 @@ change:
oldprio = p->prio;
/*
* Special case for priority boosted tasks.
*
* If the new priority is lower or equal (user space view)
* than the current (boosted) priority, we just store the new
* Take priority boosted tasks into account. If the new
* effective priority is unchanged, we just store the new
* normal parameters and do not touch the scheduler class and
* the runqueue. This will be done when the task deboost
* itself.
*/
if (rt_mutex_check_prio(p, newprio)) {
new_effective_prio = rt_mutex_get_effective_prio(p, newprio);
if (new_effective_prio == oldprio) {
__setscheduler_params(p, attr);
task_rq_unlock(rq, p, &flags);
return 0;
@@ -3606,7 +3593,7 @@ change:
put_prev_task(rq, p);
prev_class = p->sched_class;
__setscheduler(rq, p, attr);
__setscheduler(rq, p, attr, true);
if (running)
p->sched_class->set_curr_task(rq);
@@ -6991,27 +6978,23 @@ static int cpuset_cpu_inactive(struct notifier_block *nfb, unsigned long action,
unsigned long flags;
long cpu = (long)hcpu;
struct dl_bw *dl_b;
bool overflow;
int cpus;
switch (action & ~CPU_TASKS_FROZEN) {
switch (action) {
case CPU_DOWN_PREPARE:
/* explicitly allow suspend */
if (!(action & CPU_TASKS_FROZEN)) {
bool overflow;
int cpus;
rcu_read_lock_sched();
dl_b = dl_bw_of(cpu);
rcu_read_lock_sched();
dl_b = dl_bw_of(cpu);
raw_spin_lock_irqsave(&dl_b->lock, flags);
cpus = dl_bw_cpus(cpu);
overflow = __dl_overflow(dl_b, cpus, 0, 0);
raw_spin_unlock_irqrestore(&dl_b->lock, flags);
raw_spin_lock_irqsave(&dl_b->lock, flags);
cpus = dl_bw_cpus(cpu);
overflow = __dl_overflow(dl_b, cpus, 0, 0);
raw_spin_unlock_irqrestore(&dl_b->lock, flags);
rcu_read_unlock_sched();
rcu_read_unlock_sched();
if (overflow)
return notifier_from_errno(-EBUSY);
}
if (overflow)
return notifier_from_errno(-EBUSY);
cpuset_update_active_cpus(false);
break;
case CPU_DOWN_PREPARE_FROZEN:
@@ -7340,7 +7323,7 @@ static void normalize_task(struct rq *rq, struct task_struct *p)
queued = task_on_rq_queued(p);
if (queued)
dequeue_task(rq, p, 0);
__setscheduler(rq, p, &attr);
__setscheduler(rq, p, &attr, false);
if (queued) {
enqueue_task(rq, p, 0);
resched_curr(rq);