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| author | NeilBrown <neilb@suse.de> | 2010-03-25 16:20:56 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2010-05-18 15:27:52 +1000 |
| commit | 490773268cf64f68da2470e07b52c7944da6312d (patch) | |
| tree | d394aafa7203c316db6b63f128b8894e18993fca /drivers/md/md.c | |
| parent | 2b7f22284d71975e37a82db154386348eec0e52c (diff) | |
| download | kernel_samsung_smdk4412-490773268cf64f68da2470e07b52c7944da6312d.zip kernel_samsung_smdk4412-490773268cf64f68da2470e07b52c7944da6312d.tar.gz kernel_samsung_smdk4412-490773268cf64f68da2470e07b52c7944da6312d.tar.bz2 | |
md: move io accounting out of personalities into md_make_request
While I generally prefer letting personalities do as much as possible,
given that we have a central md_make_request anyway we may as well use
it to simplify code.
Also this centralises knowledge of ->gendisk which will help later.
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index c5a1b07..117663d 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -214,8 +214,11 @@ static DEFINE_SPINLOCK(all_mddevs_lock); */ static int md_make_request(struct request_queue *q, struct bio *bio) { + const int rw = bio_data_dir(bio); mddev_t *mddev = q->queuedata; int rv; + int cpu; + if (mddev == NULL || mddev->pers == NULL) { bio_io_error(bio); return 0; @@ -236,7 +239,15 @@ static int md_make_request(struct request_queue *q, struct bio *bio) } atomic_inc(&mddev->active_io); rcu_read_unlock(); + rv = mddev->pers->make_request(q, bio); + + cpu = part_stat_lock(); + part_stat_inc(cpu, &mddev->gendisk->part0, ios[rw]); + part_stat_add(cpu, &mddev->gendisk->part0, sectors[rw], + bio_sectors(bio)); + part_stat_unlock(); + if (atomic_dec_and_test(&mddev->active_io) && mddev->suspended) wake_up(&mddev->sb_wait); |