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Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull scheduler fixes from Thomas Gleixner:
 "Three fixes for scheduler and kthread code:

   - allow calling kthread_park() on an already parked thread

   - restore the sched_pi_setprio() tracepoint behaviour

   - clarify the unclear string for the scheduling domain debug output"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched, tracing: Fix trace_sched_pi_setprio() for deboosting
  kthread: Allow kthread_park() on a parked kthread
  sched/topology: Clarify root domain(s) debug string
This commit is contained in:
Linus Torvalds 2018-05-26 13:10:16 -07:00
commit cc71efda82
3 changed files with 6 additions and 6 deletions
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4
include/trace/events/sched.h
View File

@ -435,7 +435,9 @@ TRACE_EVENT(sched_pi_setprio,
memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN);
__entry->pid = tsk->pid;
__entry->oldprio = tsk->prio;
__entry->newprio = pi_task ? pi_task->prio : tsk->prio;
__entry->newprio = pi_task ?
min(tsk->normal_prio, pi_task->prio) :
tsk->normal_prio;
/* XXX SCHED_DEADLINE bits missing */
),

6
kernel/kthread.c
View File

@ -193,7 +193,7 @@ EXPORT_SYMBOL_GPL(kthread_parkme);
void kthread_park_complete(struct task_struct *k)
{
complete(&to_kthread(k)->parked);
complete_all(&to_kthread(k)->parked);
}
static int kthread(void *_create)
@ -459,6 +459,7 @@ void kthread_unpark(struct task_struct *k)
if (test_bit(KTHREAD_IS_PER_CPU, &kthread->flags))
__kthread_bind(k, kthread->cpu, TASK_PARKED);
reinit_completion(&kthread->parked);
clear_bit(KTHREAD_SHOULD_PARK, &kthread->flags);
wake_up_state(k, TASK_PARKED);
}
@ -483,9 +484,6 @@ int kthread_park(struct task_struct *k)
if (WARN_ON(k->flags & PF_EXITING))
return -ENOSYS;
if (WARN_ON_ONCE(test_bit(KTHREAD_SHOULD_PARK, &kthread->flags)))
return -EBUSY;
set_bit(KTHREAD_SHOULD_PARK, &kthread->flags);
if (k != current) {
wake_up_process(k);

2
kernel/sched/topology.c
View File

@ -1708,7 +1708,7 @@ build_sched_domains(const struct cpumask *cpu_map, struct sched_domain_attr *att
rcu_read_unlock();
if (rq && sched_debug_enabled) {
pr_info("span: %*pbl (max cpu_capacity = %lu)\n",
pr_info("root domain span: %*pbl (max cpu_capacity = %lu)\n",
cpumask_pr_args(cpu_map), rq->rd->max_cpu_capacity);
}