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| author | Kevin Corry | 2006-02-01 12:04:52 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2006-02-01 17:53:10 +0100 |
| commit | 12f03a49cf0ab5e8511911142d28699499a572c4 (patch) | |
| tree | ba20a069dae0d695d84326189d2e608b4e841ed5 /drivers/md/dm.c | |
| parent | [PATCH] device-mapper ioctl: reduce PF_MEMALLOC usage (diff) | |
| download | kernel-qcow2-linux-12f03a49cf0ab5e8511911142d28699499a572c4.tar.gz kernel-qcow2-linux-12f03a49cf0ab5e8511911142d28699499a572c4.tar.xz kernel-qcow2-linux-12f03a49cf0ab5e8511911142d28699499a572c4.zip | |
[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.c | 4 |
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. |