Add a remapping trace to request-based dm.
Signed-off-by: Kiyoshi Ueda <[email protected]>
Signed-off-by: Jun'ichi Nomura <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Alasdair G Kergon <[email protected]>
Cc: Li Zefan <[email protected]>
---
drivers/md/dm.c | 2 ++
1 file changed, 2 insertions(+)
Index: linux-2.6.31.work/drivers/md/dm.c
===================================================================
--- linux-2.6.31.work.orig/drivers/md/dm.c
+++ linux-2.6.31.work/drivers/md/dm.c
@@ -1503,6 +1503,8 @@ static void map_request(struct dm_target
break;
case DM_MAPIO_REMAPPED:
/* The target has remapped the I/O so dispatch it */
+ trace_block_rq_remap(clone->q, clone, disk_devt(dm_disk(md)),
+ blk_rq_pos(tio->orig));
dm_dispatch_request(clone);
break;
case DM_MAPIO_REQUEUE: