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sched: fix sched_slice()

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Impact: fix bad-interactivity buglet

Fix sched_slice() to emit a sane result whether a task is currently
enqueued or not.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Tested-by: Jayson King <dev@jaysonking.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

 kernel/sched_fair.c |   30 ++++++++++++------------------
 1 file changed, 12 insertions(+), 18 deletions(-)
This commit is contained in:
Mike Galbraith 2009-01-02 12:16:42 +01:00 committed by Ingo Molnar
parent b58602a4ba
commit 0a582440ff
1 changed files with 12 additions and 18 deletions
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30
kernel/sched_fair.c
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@ -385,20 +385,6 @@ int sched_nr_latency_handler(struct ctl_table *table, int write,
}
#endif
/*
* delta *= P[w / rw]
*/
static inline unsigned long
calc_delta_weight(unsigned long delta, struct sched_entity *se)
{
for_each_sched_entity(se) {
delta = calc_delta_mine(delta,
se->load.weight, &cfs_rq_of(se)->load);
}
return delta;
}
/*
* delta /= w
*/
@ -440,12 +426,20 @@ static u64 __sched_period(unsigned long nr_running)
*/
static u64 sched_slice(struct cfs_rq *cfs_rq, struct sched_entity *se)
{
unsigned long nr_running = cfs_rq->nr_running;
u64 slice = __sched_period(cfs_rq->nr_running + !se->on_rq);
if (unlikely(!se->on_rq))
nr_running++;
for_each_sched_entity(se) {
struct load_weight *load = &cfs_rq->load;
return calc_delta_weight(__sched_period(nr_running), se);
if (unlikely(!se->on_rq)) {
struct load_weight lw = cfs_rq->load;
update_load_add(&lw, se->load.weight);
load = &lw;
}
slice = calc_delta_mine(slice, se->load.weight, load);
}
return slice;
}
/*