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authorTejun Heo <tj@kernel.org>2013-01-09 08:05:13 -0800
committerTejun Heo <tj@kernel.org>2013-01-09 08:05:13 -0800
commit689665af4489f779bc82e7869509c9ac11b5a903 (patch)
tree2ae00b3beb2f658987d3e65cf9d08ff24ce916e3 /block
parent810ecfa765f8be20c8d9c468885b3403a2232d2f (diff)
downloadlinaro-lsk-689665af4489f779bc82e7869509c9ac11b5a903.tar.gz
cfq-iosched: separate out cfqg_stats_reset() from cfq_pd_reset_stats()
Separate out cfqg_stats_reset() which takes struct cfqg_stats * from cfq_pd_reset_stats() and move the latter to where other pd methods are defined. cfqg_stats_reset() will be used to implement hierarchical stats. Signed-off-by: Tejun Heo <tj@kernel.org> Acked-by: Vivek Goyal <vgoyal@redhat.com>
Diffstat (limited to 'block')
-rw-r--r--block/cfq-iosched.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index d43145cc008..f8b34bbbd37 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -688,11 +688,9 @@ static inline void cfqg_stats_update_completion(struct cfq_group *cfqg,
io_start_time - start_time);
}
-static void cfq_pd_reset_stats(struct blkcg_gq *blkg)
+/* @stats = 0 */
+static void cfqg_stats_reset(struct cfqg_stats *stats)
{
- struct cfq_group *cfqg = blkg_to_cfqg(blkg);
- struct cfqg_stats *stats = &cfqg->stats;
-
/* queued stats shouldn't be cleared */
blkg_rwstat_reset(&stats->service_bytes);
blkg_rwstat_reset(&stats->serviced);
@@ -1477,6 +1475,13 @@ static void cfq_pd_init(struct blkcg_gq *blkg)
cfqg->leaf_weight = blkg->blkcg->cfq_leaf_weight;
}
+static void cfq_pd_reset_stats(struct blkcg_gq *blkg)
+{
+ struct cfq_group *cfqg = blkg_to_cfqg(blkg);
+
+ cfqg_stats_reset(&cfqg->stats);
+}
+
/*
* Search for the cfq group current task belongs to. request_queue lock must
* be held.