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Subject[PATCH 1/3] blkio: Remove per-cfqq nr_sectors as we'll be passing
Date
that info at request dispatch with other stats now. This patch removes the
existing support for accounting sectors for a blkio_group. This will be added
back differently in the next two patches.

Signed-off-by: Divyesh Shah<dpshah@google.com>
---

block/blk-cgroup.c | 3 +--
block/blk-cgroup.h | 6 ++----
block/cfq-iosched.c | 10 ++--------
3 files changed, 5 insertions(+), 14 deletions(-)

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 4b686ad..5be3981 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -56,10 +56,9 @@ struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup)
EXPORT_SYMBOL_GPL(cgroup_to_blkio_cgroup);

void blkiocg_update_blkio_group_stats(struct blkio_group *blkg,
- unsigned long time, unsigned long sectors)
+ unsigned long time)
{
blkg->time += time;
- blkg->sectors += sectors;
}
EXPORT_SYMBOL_GPL(blkiocg_update_blkio_group_stats);

diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 8ccc204..fe44517 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -106,7 +106,7 @@ extern int blkiocg_del_blkio_group(struct blkio_group *blkg);
extern struct blkio_group *blkiocg_lookup_group(struct blkio_cgroup *blkcg,
void *key);
void blkiocg_update_blkio_group_stats(struct blkio_group *blkg,
- unsigned long time, unsigned long sectors);
+ unsigned long time);
#else
struct cgroup;
static inline struct blkio_cgroup *
@@ -123,8 +123,6 @@ blkiocg_del_blkio_group(struct blkio_group *blkg) { return 0; }
static inline struct blkio_group *
blkiocg_lookup_group(struct blkio_cgroup *blkcg, void *key) { return NULL; }
static inline void blkiocg_update_blkio_group_stats(struct blkio_group *blkg,
- unsigned long time, unsigned long sectors)
-{
-}
+ unsigned long time) {}
#endif
#endif /* _BLK_CGROUP_H */
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index ef1680b..c18e348 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -141,8 +141,6 @@ struct cfq_queue {
struct cfq_queue *new_cfqq;
struct cfq_group *cfqg;
struct cfq_group *orig_cfqg;
- /* Sectors dispatched in current dispatch round */
- unsigned long nr_sectors;
};

/*
@@ -882,8 +880,7 @@ static inline unsigned int cfq_cfqq_slice_usage(struct cfq_queue *cfqq)
slice_used = cfqq->allocated_slice;
}

- cfq_log_cfqq(cfqq->cfqd, cfqq, "sl_used=%u sect=%lu", slice_used,
- cfqq->nr_sectors);
+ cfq_log_cfqq(cfqq->cfqd, cfqq, "sl_used=%u", slice_used);
return slice_used;
}

@@ -917,8 +914,7 @@ static void cfq_group_served(struct cfq_data *cfqd, struct cfq_group *cfqg,

cfq_log_cfqg(cfqd, cfqg, "served: vt=%llu min_vt=%llu", cfqg->vdisktime,
st->min_vdisktime);
- blkiocg_update_blkio_group_stats(&cfqg->blkg, used_sl,
- cfqq->nr_sectors);
+ blkiocg_update_blkio_group_stats(&cfqg->blkg, used_sl);
}

#ifdef CONFIG_CFQ_GROUP_IOSCHED
@@ -1524,7 +1520,6 @@ static void __cfq_set_active_queue(struct cfq_data *cfqd,
cfqq->allocated_slice = 0;
cfqq->slice_end = 0;
cfqq->slice_dispatch = 0;
- cfqq->nr_sectors = 0;

cfq_clear_cfqq_wait_request(cfqq);
cfq_clear_cfqq_must_dispatch(cfqq);
@@ -1869,7 +1864,6 @@ static void cfq_dispatch_insert(struct request_queue *q, struct request *rq)
elv_dispatch_sort(q, rq);

cfqd->rq_in_flight[cfq_cfqq_sync(cfqq)]++;
- cfqq->nr_sectors += blk_rq_sectors(rq);
}

/*


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