Messages in this thread Patch in this message | | | Date | Fri, 20 Jan 2006 21:15:37 +0000 | From | Alasdair G Kergon <> | Subject | [PATCH 4/9] device-mapper statistics: basic |
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From: Kevin Corry <kevcorry@us.ibm.com>
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>
Index: linux-2.6.16-rc1/drivers/md/dm.c =================================================================== --- linux-2.6.16-rc1.orig/drivers/md/dm.c 2006-01-20 18:41:11.000000000 +0000 +++ linux-2.6.16-rc1/drivers/md/dm.c 2006-01-20 20:17:48.000000000 +0000 @@ -573,10 +573,14 @@ static void __split_bio(struct mapped_de 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. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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