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| author | Jens Axboe <axboe@suse.de> | 2005-11-01 09:26:16 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@suse.de> | 2005-11-01 09:26:16 +0100 |
| commit | a362357b6cd62643d4dda3b152639303d78473da (patch) | |
| tree | fe4ce823e638ded151edcb142f28a240860f0d33 /drivers/md/raid10.c | |
| parent | d72d904a5367ad4ca3f2c9a2ce8c3a68f0b28bf0 (diff) | |
| download | talos-op-linux-a362357b6cd62643d4dda3b152639303d78473da.tar.gz talos-op-linux-a362357b6cd62643d4dda3b152639303d78473da.zip | |
[BLOCK] Unify the seperate read/write io stat fields into arrays
Instead of having ->read_sectors and ->write_sectors, combine the two
into ->sectors[2] and similar for the other fields. This saves a branch
several places in the io path, since we don't have to care for what the
actual io direction is. On my x86-64 box, that's 200 bytes less text in
just the core (not counting the various drivers).
Signed-off-by: Jens Axboe <axboe@suse.de>
Diffstat (limited to 'drivers/md/raid10.c')
| -rw-r--r-- | drivers/md/raid10.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 28dd028415e4..bbe40e9cf923 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -668,6 +668,7 @@ static int make_request(request_queue_t *q, struct bio * bio) struct bio *read_bio; int i; int chunk_sects = conf->chunk_mask + 1; + const int rw = bio_data_dir(bio); if (unlikely(bio_barrier(bio))) { bio_endio(bio, bio->bi_size, -EOPNOTSUPP); @@ -718,13 +719,8 @@ static int make_request(request_queue_t *q, struct bio * bio) conf->nr_pending++; spin_unlock_irq(&conf->resync_lock); - if (bio_data_dir(bio)==WRITE) { - disk_stat_inc(mddev->gendisk, writes); - disk_stat_add(mddev->gendisk, write_sectors, bio_sectors(bio)); - } else { - disk_stat_inc(mddev->gendisk, reads); - disk_stat_add(mddev->gendisk, read_sectors, bio_sectors(bio)); - } + disk_stat_inc(mddev->gendisk, ios[rw]); + disk_stat_add(mddev->gendisk, sectors[rw], bio_sectors(bio)); r10_bio = mempool_alloc(conf->r10bio_pool, GFP_NOIO); @@ -734,7 +730,7 @@ static int make_request(request_queue_t *q, struct bio * bio) r10_bio->mddev = mddev; r10_bio->sector = bio->bi_sector; - if (bio_data_dir(bio) == READ) { + if (rw == READ) { /* * read balancing logic: */ |
