From 12f03a49cf0ab5e8511911142d28699499a572c4 Mon Sep 17 00:00:00 2001 From: Kevin Corry Date: Wed, 1 Feb 2006 03:04:52 -0800 Subject: [PATCH] device-mapper statistics: basic Record basic I/O statistics for mapped devices. Signed-off-by: Kevin Corry Signed-off-by: Alasdair G Kergon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/dm.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/md/dm.c') diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 8c16359f8b0..c47518386c9 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -573,10 +573,14 @@ static void __split_bio(struct mapped_device *md, struct bio *bio) static int dm_request(request_queue_t *q, struct bio *bio) { int r; + int rw = bio_data_dir(bio); struct mapped_device *md = q->queuedata; down_read(&md->io_lock); + disk_stat_inc(dm_disk(md), ios[rw]); + disk_stat_add(dm_disk(md), sectors[rw], bio_sectors(bio)); + /* * If we're suspended we have to queue * this io for later. -- cgit v1.2.3