diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-cgroup.c | 10 | ||||
| -rw-r--r-- | block/cfq-iosched.c | 67 |
2 files changed, 24 insertions, 53 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 097c4a670fa4..ff79b52d1a0e 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -584,7 +584,7 @@ EXPORT_SYMBOL_GPL(blkg_prfill_rwstat); * @off: offset to the blkg_stat in @pd * * Collect the blkg_stat specified by @off from @pd and all its online - * descendants and return the sum. The caller must be holding the queue + * descendants and their aux counts. The caller must be holding the queue * lock for online tests. */ u64 blkg_stat_recursive_sum(struct blkg_policy_data *pd, int off) @@ -602,7 +602,8 @@ u64 blkg_stat_recursive_sum(struct blkg_policy_data *pd, int off) struct blkg_stat *stat = (void *)pos_pd + off; if (pos_blkg->online) - sum += blkg_stat_read(stat); + sum += blkg_stat_read(stat) + + atomic64_read(&stat->aux_cnt); } rcu_read_unlock(); @@ -616,7 +617,7 @@ EXPORT_SYMBOL_GPL(blkg_stat_recursive_sum); * @off: offset to the blkg_stat in @pd * * Collect the blkg_rwstat specified by @off from @pd and all its online - * descendants and return the sum. The caller must be holding the queue + * descendants and their aux counts. The caller must be holding the queue * lock for online tests. */ struct blkg_rwstat blkg_rwstat_recursive_sum(struct blkg_policy_data *pd, @@ -642,7 +643,8 @@ struct blkg_rwstat blkg_rwstat_recursive_sum(struct blkg_policy_data *pd, tmp = blkg_rwstat_read(rwstat); for (i = 0; i < BLKG_RWSTAT_NR; i++) - sum.cnt[i] += tmp.cnt[i]; + sum.cnt[i] += tmp.cnt[i] + + atomic64_read(&rwstat->aux_cnt[i]); } rcu_read_unlock(); diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 0994f3b523a8..b272cfff7364 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -304,7 +304,6 @@ struct cfq_group { int dispatched; struct cfq_ttime ttime; struct cfqg_stats stats; /* stats for this cfqg */ - struct cfqg_stats dead_stats; /* stats pushed from dead children */ /* async queue for each priority case */ struct cfq_queue *async_cfqq[2][IOPRIO_BE_NR]; @@ -736,28 +735,28 @@ static void cfqg_stats_reset(struct cfqg_stats *stats) } /* @to += @from */ -static void cfqg_stats_merge(struct cfqg_stats *to, struct cfqg_stats *from) +static void cfqg_stats_add_aux(struct cfqg_stats *to, struct cfqg_stats *from) { /* queued stats shouldn't be cleared */ - blkg_rwstat_merge(&to->service_bytes, &from->service_bytes); - blkg_rwstat_merge(&to->serviced, &from->serviced); - blkg_rwstat_merge(&to->merged, &from->merged); - blkg_rwstat_merge(&to->service_time, &from->service_time); - blkg_rwstat_merge(&to->wait_time, &from->wait_time); - blkg_stat_merge(&from->time, &from->time); + blkg_rwstat_add_aux(&to->service_bytes, &from->service_bytes); + blkg_rwstat_add_aux(&to->serviced, &from->serviced); + blkg_rwstat_add_aux(&to->merged, &from->merged); + blkg_rwstat_add_aux(&to->service_time, &from->service_time); + blkg_rwstat_add_aux(&to->wait_time, &from->wait_time); + blkg_stat_add_aux(&from->time, &from->time); #ifdef CONFIG_DEBUG_BLK_CGROUP - blkg_stat_merge(&to->unaccounted_time, &from->unaccounted_time); - blkg_stat_merge(&to->avg_queue_size_sum, &from->avg_queue_size_sum); - blkg_stat_merge(&to->avg_queue_size_samples, &from->avg_queue_size_samples); - blkg_stat_merge(&to->dequeue, &from->dequeue); - blkg_stat_merge(&to->group_wait_time, &from->group_wait_time); - blkg_stat_merge(&to->idle_time, &from->idle_time); - blkg_stat_merge(&to->empty_time, &from->empty_time); + blkg_stat_add_aux(&to->unaccounted_time, &from->unaccounted_time); + blkg_stat_add_aux(&to->avg_queue_size_sum, &from->avg_queue_size_sum); + blkg_stat_add_aux(&to->avg_queue_size_samples, &from->avg_queue_size_samples); + blkg_stat_add_aux(&to->dequeue, &from->dequeue); + blkg_stat_add_aux(&to->group_wait_time, &from->group_wait_time); + blkg_stat_add_aux(&to->idle_time, &from->idle_time); + blkg_stat_add_aux(&to->empty_time, &from->empty_time); #endif } /* - * Transfer @cfqg's stats to its parent's dead_stats so that the ancestors' + * Transfer @cfqg's stats to its parent's aux counts so that the ancestors' * recursive stats can still account for the amount used by this cfqg after * it's gone. */ @@ -770,10 +769,8 @@ static void cfqg_stats_xfer_dead(struct cfq_group *cfqg) if (unlikely(!parent)) return; - cfqg_stats_merge(&parent->dead_stats, &cfqg->stats); - cfqg_stats_merge(&parent->dead_stats, &cfqg->dead_stats); + cfqg_stats_add_aux(&parent->stats, &cfqg->stats); cfqg_stats_reset(&cfqg->stats); - cfqg_stats_reset(&cfqg->dead_stats); } #else /* CONFIG_CFQ_GROUP_IOSCHED */ @@ -1606,7 +1603,6 @@ static struct blkg_policy_data *cfq_pd_alloc(gfp_t gfp, int node) cfq_init_cfqg_base(cfqg); cfqg_stats_init(&cfqg->stats); - cfqg_stats_init(&cfqg->dead_stats); return &cfqg->pd; } @@ -1649,38 +1645,11 @@ static void cfq_pd_free(struct blkg_policy_data *pd) return kfree(pd); } -/* offset delta from cfqg->stats to cfqg->dead_stats */ -static const int dead_stats_off_delta = offsetof(struct cfq_group, dead_stats) - - offsetof(struct cfq_group, stats); - -/* to be used by recursive prfill, sums live and dead stats recursively */ -static u64 cfqg_stat_pd_recursive_sum(struct blkg_policy_data *pd, int off) -{ - u64 sum = 0; - - sum += blkg_stat_recursive_sum(pd, off); - sum += blkg_stat_recursive_sum(pd, off + dead_stats_off_delta); - return sum; -} - -/* to be used by recursive prfill, sums live and dead rwstats recursively */ -static struct blkg_rwstat cfqg_rwstat_pd_recursive_sum(struct blkg_policy_data *pd, - int off) -{ - struct blkg_rwstat a, b; - - a = blkg_rwstat_recursive_sum(pd, off); - b = blkg_rwstat_recursive_sum(pd, off + dead_stats_off_delta); - blkg_rwstat_merge(&a, &b); - return a; -} - static void cfq_pd_reset_stats(struct blkg_policy_data *pd) { struct cfq_group *cfqg = pd_to_cfqg(pd); cfqg_stats_reset(&cfqg->stats); - cfqg_stats_reset(&cfqg->dead_stats); } static struct cfq_group *cfq_lookup_cfqg(struct cfq_data *cfqd, @@ -1883,7 +1852,7 @@ static int cfqg_print_rwstat(struct seq_file *sf, void *v) static u64 cfqg_prfill_stat_recursive(struct seq_file *sf, struct blkg_policy_data *pd, int off) { - u64 sum = cfqg_stat_pd_recursive_sum(pd, off); + u64 sum = blkg_stat_recursive_sum(pd, off); return __blkg_prfill_u64(sf, pd, sum); } @@ -1891,7 +1860,7 @@ static u64 cfqg_prfill_stat_recursive(struct seq_file *sf, static u64 cfqg_prfill_rwstat_recursive(struct seq_file *sf, struct blkg_policy_data *pd, int off) { - struct blkg_rwstat sum = cfqg_rwstat_pd_recursive_sum(pd, off); + struct blkg_rwstat sum = blkg_rwstat_recursive_sum(pd, off); return __blkg_prfill_rwstat(sf, pd, &sum); } |