[PATCH] Block queue IO tracing support (blktrace) as of 2006-03-23

Signed-off-by: Jens Axboe <axboe@suse.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/bio.c b/fs/bio.c
index 8f1d2e815c96..0a8c59cb68f5 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -25,6 +25,7 @@
 #include <linux/module.h>
 #include <linux/mempool.h>
 #include <linux/workqueue.h>
+#include <linux/blktrace_api.h>
 #include <scsi/sg.h>            /* for struct sg_iovec */
 
 #define BIO_POOL_SIZE 256
@@ -1095,6 +1096,9 @@ struct bio_pair *bio_split(struct bio *bi, mempool_t *pool, int first_sectors)
         if (!bp)
                 return bp;
 
+        blk_add_trace_pdu_int(bdev_get_queue(bi->bi_bdev), BLK_TA_SPLIT, bi,
+                                bi->bi_sector + first_sectors);
+
         BUG_ON(bi->bi_vcnt != 1);
         BUG_ON(bi->bi_idx != 0);
         atomic_set(&bp->cnt, 3);