sched: optimize calc_delta_mine()

[linux-2.6] / kernel / sched.c

diff --git a/kernel/sched.c b/kernel/sched.c
index e2f7f5acc80778328a892961d8e26faa7c4c8841..00c1ba706a5a36406555f70a31fd8636292af7d1 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1438,8 +1438,8 @@ calc_delta_mine(unsigned long delta_exec, unsigned long weight,
 {
        u64 tmp;
 
-       if (unlikely(!lw->inv_weight))
-               lw->inv_weight = (WMULT_CONST-lw->weight/2) / (lw->weight+1);
+       if (!lw->inv_weight)
+               lw->inv_weight = 1 + (WMULT_CONST-lw->weight/2)/(lw->weight+1);
 
        tmp = (u64)delta_exec * weight;
        /*
@@ -8025,7 +8025,7 @@ static void init_tg_cfs_entry(struct task_group *tg, struct cfs_rq *cfs_rq,
 
        se->my_q = cfs_rq;
        se->load.weight = tg->shares;
-       se->load.inv_weight = div64_64(1ULL<<32, se->load.weight);
+       se->load.inv_weight = 0;
        se->parent = parent;
 }
 #endif
@@ -8692,7 +8692,7 @@ static void __set_se_shares(struct sched_entity *se, unsigned long shares)
                dequeue_entity(cfs_rq, se, 0);
 
        se->load.weight = shares;
-       se->load.inv_weight = div64_64((1ULL<<32), shares);
+       se->load.inv_weight = 0;
 
        if (on_rq)
                enqueue_entity(cfs_rq, se, 0);
@@ -8787,7 +8787,7 @@ static unsigned long to_ratio(u64 period, u64 runtime)
        if (runtime == RUNTIME_INF)
                return 1ULL << 16;
 
-       return div64_64(runtime << 16, period);
+       return div64_u64(runtime << 16, period);
 }
 
 #ifdef CONFIG_CGROUP_SCHED