From 490773268cf64f68da2470e07b52c7944da6312d Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 25 Mar 2010 16:20:56 +1100 Subject: 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 --- drivers/md/md.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'drivers/md/md.c') diff --git a/drivers/md/md.c b/drivers/md/md.c index c5a1b0725c9f..117663d2a4e5 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); -- cgit v1.2.3