sched: fix sched_slice()
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(-)
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@ -385,20 +385,6 @@ int sched_nr_latency_handler(struct ctl_table *table, int write,
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}
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#endif
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/*
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* delta *= P[w / rw]
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*/
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static inline unsigned long
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calc_delta_weight(unsigned long delta, struct sched_entity *se)
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{
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for_each_sched_entity(se) {
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delta = calc_delta_mine(delta,
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se->load.weight, &cfs_rq_of(se)->load);
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}
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return delta;
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}
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/*
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* delta /= w
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*/
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@ -440,12 +426,20 @@ static u64 __sched_period(unsigned long nr_running)
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*/
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static u64 sched_slice(struct cfs_rq *cfs_rq, struct sched_entity *se)
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{
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unsigned long nr_running = cfs_rq->nr_running;
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u64 slice = __sched_period(cfs_rq->nr_running + !se->on_rq);
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if (unlikely(!se->on_rq))
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nr_running++;
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for_each_sched_entity(se) {
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struct load_weight *load = &cfs_rq->load;
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return calc_delta_weight(__sched_period(nr_running), se);
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if (unlikely(!se->on_rq)) {
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struct load_weight lw = cfs_rq->load;
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update_load_add(&lw, se->load.weight);
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load = &lw;
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}
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slice = calc_delta_mine(slice, se->load.weight, load);
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}
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return slice;
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}
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/*
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