sched: fix build error in kernel/sched_rt.c when RT_GROUP_SCHED && !SMP
Ingo found a build error in the scheduler when RT_GROUP_SCHED was enabled, but SMP was not. This patch rearranges the code such that it is a little more streamlined and compiles under all permutations of SMP, UP and RT_GROUP_SCHED. It was boot tested on my 4-way x86_64 and it still passes preempt-test. Signed-off-by: Gregory Haskins <ghaskins@novell.com>
This commit is contained in:
Gregory Haskins
parent
b07430ac37
commit
398a153b16
|
|
@ -466,7 +466,9 @@ struct rt_rq {
|
|||
#if defined CONFIG_SMP || defined CONFIG_RT_GROUP_SCHED
|
||||
struct {
|
||||
int curr; /* highest queued rt task prio */
|
||||
#ifdef CONFIG_SMP
|
||||
int next; /* next highest */
|
||||
#endif
|
||||
} highest_prio;
|
||||
#endif
|
||||
#ifdef CONFIG_SMP
|
||||
|
|
@ -8267,8 +8269,10 @@ static void init_rt_rq(struct rt_rq *rt_rq, struct rq *rq)
|
|||
|
||||
#if defined CONFIG_SMP || defined CONFIG_RT_GROUP_SCHED
|
||||
rt_rq->highest_prio.curr = MAX_RT_PRIO;
|
||||
#ifdef CONFIG_SMP
|
||||
rt_rq->highest_prio.next = MAX_RT_PRIO;
|
||||
#endif
|
||||
#endif
|
||||
#ifdef CONFIG_SMP
|
||||
rt_rq->rt_nr_migratory = 0;
|
||||
rt_rq->overloaded = 0;
|
||||
|
|
|
|||
|
|
@ -3,6 +3,40 @@
|
|||
* policies)
|
||||
*/
|
||||
|
||||
static inline struct task_struct *rt_task_of(struct sched_rt_entity *rt_se)
|
||||
{
|
||||
return container_of(rt_se, struct task_struct, rt);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_RT_GROUP_SCHED
|
||||
|
||||
static inline struct rq *rq_of_rt_rq(struct rt_rq *rt_rq)
|
||||
{
|
||||
return rt_rq->rq;
|
||||
}
|
||||
|
||||
static inline struct rt_rq *rt_rq_of_se(struct sched_rt_entity *rt_se)
|
||||
{
|
||||
return rt_se->rt_rq;
|
||||
}
|
||||
|
||||
#else /* CONFIG_RT_GROUP_SCHED */
|
||||
|
||||
static inline struct rq *rq_of_rt_rq(struct rt_rq *rt_rq)
|
||||
{
|
||||
return container_of(rt_rq, struct rq, rt);
|
||||
}
|
||||
|
||||
static inline struct rt_rq *rt_rq_of_se(struct sched_rt_entity *rt_se)
|
||||
{
|
||||
struct task_struct *p = rt_task_of(rt_se);
|
||||
struct rq *rq = task_rq(p);
|
||||
|
||||
return &rq->rt;
|
||||
}
|
||||
|
||||
#endif /* CONFIG_RT_GROUP_SCHED */
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
|
||||
static inline int rt_overloaded(struct rq *rq)
|
||||
|
|
@ -37,19 +71,35 @@ static inline void rt_clear_overload(struct rq *rq)
|
|||
cpumask_clear_cpu(rq->cpu, rq->rd->rto_mask);
|
||||
}
|
||||
|
||||
static void update_rt_migration(struct rq *rq)
|
||||
static void update_rt_migration(struct rt_rq *rt_rq)
|
||||
{
|
||||
if (rq->rt.rt_nr_migratory && (rq->rt.rt_nr_running > 1)) {
|
||||
if (!rq->rt.overloaded) {
|
||||
rt_set_overload(rq);
|
||||
rq->rt.overloaded = 1;
|
||||
if (rt_rq->rt_nr_migratory && (rt_rq->rt_nr_running > 1)) {
|
||||
if (!rt_rq->overloaded) {
|
||||
rt_set_overload(rq_of_rt_rq(rt_rq));
|
||||
rt_rq->overloaded = 1;
|
||||
}
|
||||
} else if (rq->rt.overloaded) {
|
||||
rt_clear_overload(rq);
|
||||
rq->rt.overloaded = 0;
|
||||
} else if (rt_rq->overloaded) {
|
||||
rt_clear_overload(rq_of_rt_rq(rt_rq));
|
||||
rt_rq->overloaded = 0;
|
||||
}
|
||||
}
|
||||
|
||||
static void inc_rt_migration(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
|
||||
{
|
||||
if (rt_se->nr_cpus_allowed > 1)
|
||||
rt_rq->rt_nr_migratory++;
|
||||
|
||||
update_rt_migration(rt_rq);
|
||||
}
|
||||
|
||||
static void dec_rt_migration(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
|
||||
{
|
||||
if (rt_se->nr_cpus_allowed > 1)
|
||||
rt_rq->rt_nr_migratory--;
|
||||
|
||||
update_rt_migration(rt_rq);
|
||||
}
|
||||
|
||||
static void enqueue_pushable_task(struct rq *rq, struct task_struct *p)
|
||||
{
|
||||
plist_del(&p->pushable_tasks, &rq->rt.pushable_tasks);
|
||||
|
|
@ -68,14 +118,13 @@ static inline
|
|||
void enqueue_pushable_task(struct rq *rq, struct task_struct *p) {}
|
||||
static inline
|
||||
void dequeue_pushable_task(struct rq *rq, struct task_struct *p) {}
|
||||
static inline
|
||||
void inc_rt_migration(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq) {}
|
||||
static inline
|
||||
void dec_rt_migration(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq) {}
|
||||
|
||||
#endif /* CONFIG_SMP */
|
||||
|
||||
static inline struct task_struct *rt_task_of(struct sched_rt_entity *rt_se)
|
||||
{
|
||||
return container_of(rt_se, struct task_struct, rt);
|
||||
}
|
||||
|
||||
static inline int on_rt_rq(struct sched_rt_entity *rt_se)
|
||||
{
|
||||
return !list_empty(&rt_se->run_list);
|
||||
|
|
@ -99,16 +148,6 @@ static inline u64 sched_rt_period(struct rt_rq *rt_rq)
|
|||
#define for_each_leaf_rt_rq(rt_rq, rq) \
|
||||
list_for_each_entry_rcu(rt_rq, &rq->leaf_rt_rq_list, leaf_rt_rq_list)
|
||||
|
||||
static inline struct rq *rq_of_rt_rq(struct rt_rq *rt_rq)
|
||||
{
|
||||
return rt_rq->rq;
|
||||
}
|
||||
|
||||
static inline struct rt_rq *rt_rq_of_se(struct sched_rt_entity *rt_se)
|
||||
{
|
||||
return rt_se->rt_rq;
|
||||
}
|
||||
|
||||
#define for_each_sched_rt_entity(rt_se) \
|
||||
for (; rt_se; rt_se = rt_se->parent)
|
||||
|
||||
|
|
@ -196,19 +235,6 @@ static inline u64 sched_rt_period(struct rt_rq *rt_rq)
|
|||
#define for_each_leaf_rt_rq(rt_rq, rq) \
|
||||
for (rt_rq = &rq->rt; rt_rq; rt_rq = NULL)
|
||||
|
||||
static inline struct rq *rq_of_rt_rq(struct rt_rq *rt_rq)
|
||||
{
|
||||
return container_of(rt_rq, struct rq, rt);
|
||||
}
|
||||
|
||||
static inline struct rt_rq *rt_rq_of_se(struct sched_rt_entity *rt_se)
|
||||
{
|
||||
struct task_struct *p = rt_task_of(rt_se);
|
||||
struct rq *rq = task_rq(p);
|
||||
|
||||
return &rq->rt;
|
||||
}
|
||||
|
||||
#define for_each_sched_rt_entity(rt_se) \
|
||||
for (; rt_se; rt_se = NULL)
|
||||
|
||||
|
|
@ -567,7 +593,7 @@ static void update_curr_rt(struct rq *rq)
|
|||
}
|
||||
}
|
||||
|
||||
#if defined CONFIG_SMP || defined CONFIG_RT_GROUP_SCHED
|
||||
#if defined CONFIG_SMP
|
||||
|
||||
static struct task_struct *pick_next_highest_task_rt(struct rq *rq, int cpu);
|
||||
|
||||
|
|
@ -580,33 +606,24 @@ static inline int next_prio(struct rq *rq)
|
|||
else
|
||||
return MAX_RT_PRIO;
|
||||
}
|
||||
#endif
|
||||
|
||||
static inline
|
||||
void inc_rt_tasks(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
|
||||
static void
|
||||
inc_rt_prio_smp(struct rt_rq *rt_rq, int prio, int prev_prio)
|
||||
{
|
||||
int prio = rt_se_prio(rt_se);
|
||||
#ifdef CONFIG_SMP
|
||||
struct rq *rq = rq_of_rt_rq(rt_rq);
|
||||
#endif
|
||||
|
||||
WARN_ON(!rt_prio(prio));
|
||||
rt_rq->rt_nr_running++;
|
||||
#if defined CONFIG_SMP || defined CONFIG_RT_GROUP_SCHED
|
||||
if (prio < rt_rq->highest_prio.curr) {
|
||||
if (prio < prev_prio) {
|
||||
|
||||
/*
|
||||
* If the new task is higher in priority than anything on the
|
||||
* run-queue, we have a new high that must be published to
|
||||
* the world. We also know that the previous high becomes
|
||||
* our next-highest.
|
||||
* run-queue, we know that the previous high becomes our
|
||||
* next-highest.
|
||||
*/
|
||||
rt_rq->highest_prio.next = rt_rq->highest_prio.curr;
|
||||
rt_rq->highest_prio.curr = prio;
|
||||
#ifdef CONFIG_SMP
|
||||
rt_rq->highest_prio.next = prev_prio;
|
||||
|
||||
if (rq->online)
|
||||
cpupri_set(&rq->rd->cpupri, rq->cpu, prio);
|
||||
#endif
|
||||
|
||||
} else if (prio == rt_rq->highest_prio.curr)
|
||||
/*
|
||||
* If the next task is equal in priority to the highest on
|
||||
|
|
@ -619,72 +636,131 @@ void inc_rt_tasks(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
|
|||
* Otherwise, we need to recompute next-highest
|
||||
*/
|
||||
rt_rq->highest_prio.next = next_prio(rq);
|
||||
#endif
|
||||
#ifdef CONFIG_SMP
|
||||
if (rt_se->nr_cpus_allowed > 1)
|
||||
rq->rt.rt_nr_migratory++;
|
||||
|
||||
update_rt_migration(rq);
|
||||
#endif
|
||||
#ifdef CONFIG_RT_GROUP_SCHED
|
||||
if (rt_se_boosted(rt_se))
|
||||
rt_rq->rt_nr_boosted++;
|
||||
|
||||
if (rt_rq->tg)
|
||||
start_rt_bandwidth(&rt_rq->tg->rt_bandwidth);
|
||||
#else
|
||||
start_rt_bandwidth(&def_rt_bandwidth);
|
||||
#endif
|
||||
}
|
||||
|
||||
static inline
|
||||
void dec_rt_tasks(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
|
||||
static void
|
||||
dec_rt_prio_smp(struct rt_rq *rt_rq, int prio, int prev_prio)
|
||||
{
|
||||
#ifdef CONFIG_SMP
|
||||
struct rq *rq = rq_of_rt_rq(rt_rq);
|
||||
int highest_prio = rt_rq->highest_prio.curr;
|
||||
#endif
|
||||
|
||||
WARN_ON(!rt_prio(rt_se_prio(rt_se)));
|
||||
WARN_ON(!rt_rq->rt_nr_running);
|
||||
rt_rq->rt_nr_running--;
|
||||
if (rt_rq->rt_nr_running && (prio <= rt_rq->highest_prio.next))
|
||||
rt_rq->highest_prio.next = next_prio(rq);
|
||||
|
||||
if (rq->online && rt_rq->highest_prio.curr != prev_prio)
|
||||
cpupri_set(&rq->rd->cpupri, rq->cpu, rt_rq->highest_prio.curr);
|
||||
}
|
||||
|
||||
#else /* CONFIG_SMP */
|
||||
|
||||
static inline
|
||||
void inc_rt_prio_smp(struct rt_rq *rt_rq, int prio, int prev_prio) {}
|
||||
static inline
|
||||
void dec_rt_prio_smp(struct rt_rq *rt_rq, int prio, int prev_prio) {}
|
||||
|
||||
#endif /* CONFIG_SMP */
|
||||
|
||||
#if defined CONFIG_SMP || defined CONFIG_RT_GROUP_SCHED
|
||||
if (rt_rq->rt_nr_running) {
|
||||
int prio = rt_se_prio(rt_se);
|
||||
static void
|
||||
inc_rt_prio(struct rt_rq *rt_rq, int prio)
|
||||
{
|
||||
int prev_prio = rt_rq->highest_prio.curr;
|
||||
|
||||
WARN_ON(prio < rt_rq->highest_prio.curr);
|
||||
if (prio < prev_prio)
|
||||
rt_rq->highest_prio.curr = prio;
|
||||
|
||||
inc_rt_prio_smp(rt_rq, prio, prev_prio);
|
||||
}
|
||||
|
||||
static void
|
||||
dec_rt_prio(struct rt_rq *rt_rq, int prio)
|
||||
{
|
||||
int prev_prio = rt_rq->highest_prio.curr;
|
||||
|
||||
if (rt_rq->rt_nr_running) {
|
||||
|
||||
WARN_ON(prio < prev_prio);
|
||||
|
||||
/*
|
||||
* This may have been our highest or next-highest priority
|
||||
* task and therefore we may have some recomputation to do
|
||||
* This may have been our highest task, and therefore
|
||||
* we may have some recomputation to do
|
||||
*/
|
||||
if (prio == rt_rq->highest_prio.curr) {
|
||||
if (prio == prev_prio) {
|
||||
struct rt_prio_array *array = &rt_rq->active;
|
||||
|
||||
rt_rq->highest_prio.curr =
|
||||
sched_find_first_bit(array->bitmap);
|
||||
}
|
||||
|
||||
if (prio <= rt_rq->highest_prio.next)
|
||||
rt_rq->highest_prio.next = next_prio(rq);
|
||||
} else
|
||||
rt_rq->highest_prio.curr = MAX_RT_PRIO;
|
||||
#endif
|
||||
#ifdef CONFIG_SMP
|
||||
if (rt_se->nr_cpus_allowed > 1)
|
||||
rq->rt.rt_nr_migratory--;
|
||||
|
||||
if (rq->online && rt_rq->highest_prio.curr != highest_prio)
|
||||
cpupri_set(&rq->rd->cpupri, rq->cpu, rt_rq->highest_prio.curr);
|
||||
dec_rt_prio_smp(rt_rq, prio, prev_prio);
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
static inline void inc_rt_prio(struct rt_rq *rt_rq, int prio) {}
|
||||
static inline void dec_rt_prio(struct rt_rq *rt_rq, int prio) {}
|
||||
|
||||
#endif /* CONFIG_SMP || CONFIG_RT_GROUP_SCHED */
|
||||
|
||||
update_rt_migration(rq);
|
||||
#endif /* CONFIG_SMP */
|
||||
#ifdef CONFIG_RT_GROUP_SCHED
|
||||
|
||||
static void
|
||||
inc_rt_group(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
|
||||
{
|
||||
if (rt_se_boosted(rt_se))
|
||||
rt_rq->rt_nr_boosted++;
|
||||
|
||||
if (rt_rq->tg)
|
||||
start_rt_bandwidth(&rt_rq->tg->rt_bandwidth);
|
||||
}
|
||||
|
||||
static void
|
||||
dec_rt_group(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
|
||||
{
|
||||
if (rt_se_boosted(rt_se))
|
||||
rt_rq->rt_nr_boosted--;
|
||||
|
||||
WARN_ON(!rt_rq->rt_nr_running && rt_rq->rt_nr_boosted);
|
||||
#endif
|
||||
}
|
||||
|
||||
#else /* CONFIG_RT_GROUP_SCHED */
|
||||
|
||||
static void
|
||||
inc_rt_group(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
|
||||
{
|
||||
start_rt_bandwidth(&def_rt_bandwidth);
|
||||
}
|
||||
|
||||
static inline
|
||||
void dec_rt_group(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq) {}
|
||||
|
||||
#endif /* CONFIG_RT_GROUP_SCHED */
|
||||
|
||||
static inline
|
||||
void inc_rt_tasks(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
|
||||
{
|
||||
int prio = rt_se_prio(rt_se);
|
||||
|
||||
WARN_ON(!rt_prio(prio));
|
||||
rt_rq->rt_nr_running++;
|
||||
|
||||
inc_rt_prio(rt_rq, prio);
|
||||
inc_rt_migration(rt_se, rt_rq);
|
||||
inc_rt_group(rt_se, rt_rq);
|
||||
}
|
||||
|
||||
static inline
|
||||
void dec_rt_tasks(struct sched_rt_entity *rt_se, struct rt_rq *rt_rq)
|
||||
{
|
||||
WARN_ON(!rt_prio(rt_se_prio(rt_se)));
|
||||
WARN_ON(!rt_rq->rt_nr_running);
|
||||
rt_rq->rt_nr_running--;
|
||||
|
||||
dec_rt_prio(rt_rq, rt_se_prio(rt_se));
|
||||
dec_rt_migration(rt_se, rt_rq);
|
||||
dec_rt_group(rt_se, rt_rq);
|
||||
}
|
||||
|
||||
static void __enqueue_rt_entity(struct sched_rt_entity *rt_se)
|
||||
|
|
@ -1453,7 +1529,7 @@ static void set_cpus_allowed_rt(struct task_struct *p,
|
|||
rq->rt.rt_nr_migratory--;
|
||||
}
|
||||
|
||||
update_rt_migration(rq);
|
||||
update_rt_migration(&rq->rt);
|
||||
}
|
||||
|
||||
cpumask_copy(&p->cpus_allowed, new_mask);
|
||||
|
|
|
|||
Loading…
Reference in New Issue