Commit f64f6114 authored by Ingo Molnar's avatar Ingo Molnar

sched: remove sched_exit()

remove sched_exit(): the elaborate dance of us trying to recover
timeslices given to child tasks never really worked.

CFS does not need it either.
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent c65cc870
......@@ -182,7 +182,6 @@ void release_task(struct task_struct * p)
zap_leader = (leader->exit_signal == -1);
}
sched_exit(p);
write_unlock_irq(&tasklist_lock);
proc_flush_task(p);
release_thread(p);
......
......@@ -1831,37 +1831,6 @@ void fastcall wake_up_new_task(struct task_struct *p, unsigned long clone_flags)
task_rq_unlock(this_rq, &flags);
}
/*
* Potentially available exiting-child timeslices are
* retrieved here - this way the parent does not get
* penalized for creating too many threads.
*
* (this cannot be used to 'generate' timeslices
* artificially, because any timeslice recovered here
* was given away by the parent in the first place.)
*/
void fastcall sched_exit(struct task_struct *p)
{
unsigned long flags;
struct rq *rq;
/*
* If the child was a (relative-) CPU hog then decrease
* the sleep_avg of the parent as well.
*/
rq = task_rq_lock(p->parent, &flags);
if (p->first_time_slice && task_cpu(p) == task_cpu(p->parent)) {
p->parent->time_slice += p->time_slice;
if (unlikely(p->parent->time_slice > task_timeslice(p)))
p->parent->time_slice = task_timeslice(p);
}
if (p->sleep_avg < p->parent->sleep_avg)
p->parent->sleep_avg = p->parent->sleep_avg /
(EXIT_WEIGHT + 1) * EXIT_WEIGHT + p->sleep_avg /
(EXIT_WEIGHT + 1);
task_rq_unlock(rq, &flags);
}
/**
* prepare_task_switch - prepare to switch tasks
* @rq: the runqueue preparing to switch
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment