blk-mq: fix initializing request's start time

blk_rq_init() is called in req's complete handler to initialize the request, so the members of start_time and start_time_ns might become inaccurate when it is allocated in future. The patch initializes the two members in blk_mq_rq_ctx_init() to fix the problem. Signed-off-by: Ming Lei <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
vincehsu · Jan 3, 2014 · 0fec08b · 0fec08b
1 parent 3edcc0c
commit 0fec08b
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/block/blk-mq.c b/block/blk-mq.c
@@ -190,6 +190,8 @@ static void blk_mq_rq_ctx_init(struct request_queue *q, struct blk_mq_ctx *ctx,
 
 	rq->mq_ctx = ctx;
 	rq->cmd_flags = rw_flags;
+	rq->start_time = jiffies;
+	set_start_time_ns(rq);
 	ctx->rq_dispatched[rw_is_sync(rw_flags)]++;
 }