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Merge "sched: fix misalignment between requested and actual windows"

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Linux Build Service Account 2014-08-13 18:28:46 -07:00 committed by Gerrit - the friendly Code Review server
parent 88efb4d982 7ebd479ae3
commit a879fc4a4e
1 changed files with 10 additions and 3 deletions
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13
kernel/sched/core.c
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@ -1596,18 +1596,23 @@ static inline void mark_task_starting(struct task_struct *p)
p->ravg.flags |= PREV_WINDOW_CONTRIB;
}
static int update_alignment;
static inline void set_window_start(struct rq *rq)
{
int cpu = cpu_of(rq);
struct rq *sync_rq = cpu_rq(sync_cpu);
if (cpu == sync_cpu && !update_alignment) {
sched_init_jiffy = get_jiffies_64();
sched_clock_at_init_jiffy = sched_clock();
}
if (rq->window_start || !sched_enable_hmp)
return;
if (cpu == sync_cpu) {
rq->window_start = sched_clock();
sched_init_jiffy = get_jiffies_64();
sched_clock_at_init_jiffy = rq->window_start;
rq->window_start = sched_clock_at_init_jiffy;
} else {
raw_spin_unlock(&rq->lock);
double_rq_lock(rq, sync_rq);
@ -1719,6 +1724,8 @@ int sched_set_window(u64 window_start, unsigned int window_size)
(window_size * TICK_NSEC < MIN_SCHED_RAVG_WINDOW))
return -EINVAL;
update_alignment = 1;
local_irq_save(flags);
now = get_jiffies_64();