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]>
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 6914f9b..473ce40 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -190,6 +190,8 @@
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)]++;
}
