[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/block/elevator.c b/block/elevator.c
index db3d0d8296a0..5e558c4689a4 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -33,6 +33,7 @@
 #include <linux/init.h>
 #include <linux/compiler.h>
 #include <linux/delay.h>
+#include <linux/blktrace_api.h>
 
 #include <asm/uaccess.h>
 
@@ -333,6 +334,8 @@ void elv_insert(request_queue_t *q, struct request *rq, int where)
         struct list_head *pos;
         unsigned ordseq;
 
+        blk_add_trace_rq(q, rq, BLK_TA_INSERT);
+
         rq->q = q;
 
         switch (where) {
@@ -499,6 +502,7 @@ struct request *elv_next_request(request_queue_t *q)
                          * not be passed by new incoming requests
                          */
                         rq->flags |= REQ_STARTED;
+                        blk_add_trace_rq(q, rq, BLK_TA_ISSUE);
                 }
 
                 if (!q->boundary_rq || q->boundary_rq == rq) {