mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
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: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
parent
c65cc87052
commit
f64f61145a
2 changed files with 0 additions and 32 deletions
|
@ -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
|
||||
|
|
Loading…
Reference in a new issue