Commit 0fec08b4 authored Jan 03, 2014 by Ming Lei Committed by Jens Axboe Jan 03, 2014

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 <tom.leiming@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

parent 3edcc0ce

block/blk-mq.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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)]++;
		}