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sched: clean up the wakeup preempt check, #2 

clean up the preemption check to not use unnecessary 64-bit
variables. This improves code size:

   text    data     bss     dec     hex filename
  44227    3326      36   47589    b9e5 sched.o.before
  44201    3326      36   47563    b9cb sched.o.after

Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2007-11-09 22:39:39 +01:00
parent 77d9cc44b5
commit 502d26b524
1 changed files with 2 additions and 3 deletions
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5
kernel/sched_fair.c
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@ -837,7 +837,7 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p)
struct task_struct *curr = rq->curr;
struct cfs_rq *cfs_rq = task_cfs_rq(curr);
struct sched_entity *se = &curr->se, *pse = &p->se;
s64 delta, gran;
unsigned long gran;
if (unlikely(rt_prio(p->prio))) {
update_rq_clock(rq);
@ -860,12 +860,11 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p)
pse = parent_entity(pse);
}
delta = se->vruntime - pse->vruntime;
gran = sysctl_sched_wakeup_granularity;
if (unlikely(se->load.weight != NICE_0_LOAD))
gran = calc_delta_fair(gran, &se->load);
if (delta > gran)
if (pse->vruntime + gran < se->vruntime)
resched_task(curr);
}