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Don't bother calling setrunnable() and clearing the sleeping flag in 

sleepq_resume_thread() if the thread isn't asleep.
This commit is contained in:
John Baldwin 2008-11-04 19:13:53 +00:00
parent 2ff47c5f18
commit 0caf1ab15a
1 changed files with 12 additions and 9 deletions
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21
sys/kern/subr_sleepqueue.c
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@ -680,22 +680,25 @@ sleepq_resume_thread(struct sleepqueue *sq, struct thread *td, int pri)
td->td_wchan = NULL;
td->td_flags &= ~TDF_SINTR;
/*
* Note that thread td might not be sleeping if it is running
* sleepq_catch_signals() on another CPU or is blocked on
* its proc lock to check signals. It doesn't hurt to clear
* the sleeping flag if it isn't set though, so we just always
* do it. However, we can't assert that it is set.
*/
CTR3(KTR_PROC, "sleepq_wakeup: thread %p (pid %ld, %s)",
(void *)td, (long)td->td_proc->p_pid, td->td_name);
TD_CLR_SLEEPING(td);
/* Adjust priority if requested. */
MPASS(pri == 0 || (pri >= PRI_MIN && pri <= PRI_MAX));
if (pri != 0 && td->td_priority > pri)
sched_prio(td, pri);
return (setrunnable(td));
/*
* Note that thread td might not be sleeping if it is running
* sleepq_catch_signals() on another CPU or is blocked on its
* proc lock to check signals. There's no need to mark the
* thread runnable in that case.
*/
if (TD_IS_SLEEPING(td)) {
TD_CLR_SLEEPING(td);
return (setrunnable(td));
}
return (0);
}
#ifdef INVARIANTS