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Date: Fri, 3 Jan 2014 19:29:04 +0800 From: Ming Lei <tom.leiming@...il.com> To: Jens Axboe <axboe@...nel.dk>, linux-kernel@...r.kernel.org Cc: Ming Lei <tom.leiming@...il.com> Subject: [PATCH] block: 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. Cc: Jens Axboe <axboe@...nel.dk> Signed-off-by: Ming Lei <tom.leiming@...il.com> --- block/blk-mq.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/block/blk-mq.c b/block/blk-mq.c index 0974a26..68734f87 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -188,6 +188,8 @@ 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)]++; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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