* [PATCH 3/3] dm: Add a remapping trace to request-based dm
@ 2009-09-18 15:13 Jun'ichi Nomura
0 siblings, 0 replies; only message in thread
From: Jun'ichi Nomura @ 2009-09-18 15:13 UTC (permalink / raw)
To: Jens Axboe, Alasdair G Kergon, Li Zefan
Cc: linux-kernel, device-mapper development, j-nomura
Add a remapping trace to request-based dm.
Signed-off-by: Kiyoshi Ueda <k-ueda@ct.jp.nec.com>
Signed-off-by: Jun'ichi Nomura <j-nomura@ce.jp.nec.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Alasdair G Kergon <agk@redhat.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
---
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:
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