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authorKevin Corry <kevcorry@us.ibm.com>2006-02-01 03:04:52 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-02-01 08:53:10 -0800
commit12f03a49cf0ab5e8511911142d28699499a572c4 (patch)
treeba20a069dae0d695d84326189d2e608b4e841ed5 /drivers/md/dm.c
parentdab6a42915554f70220e5a2ff55c59c749582c7b (diff)
downloadlinux-bcache-12f03a49cf0ab5e8511911142d28699499a572c4.tar.zst
[PATCH] device-mapper statistics: basic
Record basic I/O statistics for mapped devices. Signed-off-by: Kevin Corry <kevcorry@us.ibm.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md/dm.c')
-rw-r--r--drivers/md/dm.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 8c16359f8b01..c47518386c91 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.