diff options
| author | Tejun Heo <tj@kernel.org> | 2008-08-25 19:56:14 +0900 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2008-10-09 08:56:08 +0200 |
| commit | 074a7aca7afa6f230104e8e65eba3420263714a5 (patch) | |
| tree | f418313e45bd55be8156c8a3e8f9a216cf63058d /drivers/md/dm.c | |
| parent | eddb2e26b5ee3c5da68ba4bf1921ba20e2097bff (diff) | |
block: move stats from disk to part0
Move stats related fields - stamp, in_flight, dkstats - from disk to
part0 and unify stat handling such that...
* part_stat_*() now updates part0 together if the specified partition
is not part0. ie. part_stat_*() are now essentially all_stat_*().
* {disk|all}_stat_*() are gone.
* part_round_stats() is updated similary. It handles part0 stats
automatically and disk_round_stats() is killed.
* part_{inc|dec}_in_fligh() is implemented which automatically updates
part0 stats for parts other than part0.
* disk_map_sector_rcu() is updated to return part0 if no part matches.
Combined with the above changes, this makes NULL special case
handling in callers unnecessary.
* Separate stats show code paths for disk are collapsed into part
stats show code paths.
* Rename disk_stat_lock/unlock() to part_stat_lock/unlock()
While at it, reposition stat handling macros a bit and add missing
parentheses around macro parameters.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 637806695bb..327de03a5bd 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -381,10 +381,10 @@ static void start_io_acct(struct dm_io *io) io->start_time = jiffies; - cpu = disk_stat_lock(); - disk_round_stats(cpu, dm_disk(md)); - disk_stat_unlock(); - dm_disk(md)->in_flight = atomic_inc_return(&md->pending); + cpu = part_stat_lock(); + part_round_stats(cpu, &dm_disk(md)->part0); + part_stat_unlock(); + dm_disk(md)->part0.in_flight = atomic_inc_return(&md->pending); } static int end_io_acct(struct dm_io *io) @@ -395,12 +395,13 @@ static int end_io_acct(struct dm_io *io) int pending, cpu; int rw = bio_data_dir(bio); - cpu = disk_stat_lock(); - disk_round_stats(cpu, dm_disk(md)); - disk_stat_add(cpu, dm_disk(md), ticks[rw], duration); - disk_stat_unlock(); + cpu = part_stat_lock(); + part_round_stats(cpu, &dm_disk(md)->part0); + part_stat_add(cpu, &dm_disk(md)->part0, ticks[rw], duration); + part_stat_unlock(); - dm_disk(md)->in_flight = pending = atomic_dec_return(&md->pending); + dm_disk(md)->part0.in_flight = pending = + atomic_dec_return(&md->pending); return !pending; } @@ -899,10 +900,10 @@ static int dm_request(struct request_queue *q, struct bio *bio) down_read(&md->io_lock); - cpu = disk_stat_lock(); - disk_stat_inc(cpu, dm_disk(md), ios[rw]); - disk_stat_add(cpu, dm_disk(md), sectors[rw], bio_sectors(bio)); - disk_stat_unlock(); + cpu = part_stat_lock(); + part_stat_inc(cpu, &dm_disk(md)->part0, ios[rw]); + part_stat_add(cpu, &dm_disk(md)->part0, sectors[rw], bio_sectors(bio)); + part_stat_unlock(); /* * If we're suspended we have to queue |