[patch 2/2]block: add missed trace_block_plug

[Shaohua Li]

After flush plug list, the list has no request, so we need
add a trace_block_plug.

Signed-off-by: Shaohua Li <shaohua.li@xxxxxxxxx>

---
 block/blk-core.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Index: linux/block/blk-core.c
===================================================================
--- linux.orig/block/blk-core.c	2011-09-28 11:05:22.000000000 +0800
+++ linux/block/blk-core.c	2011-09-28 11:05:42.000000000 +0800
@@ -1307,8 +1307,10 @@ get_rq:
 				if (__rq->q != q)
 					plug->should_sort = 1;
 			}
-			if (request_count >= BLK_MAX_REQUEST_COUNT)
+			if (request_count >= BLK_MAX_REQUEST_COUNT) {
 				blk_flush_plug_list(plug, false);
+				trace_block_plug(q);
+			}
 		}
 		list_add_tail(&req->queuelist, &plug->list);
 		drive_stat_acct(req, 1);


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/