3.13.11.7 -stable review patch. If anyone has any objections, please let me
know.
------------------
From: Ming Lei <tom.leim...@gmail.com>
commit 0fec08b4ecfc36fd8a64432343b2964fb86d2675 upstream.
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.leim...@gmail.com>
Signed-off-by: Jens Axboe <ax...@kernel.dk>
Cc: Chris J Arges <chris.j.ar...@canonical.com>
Cc: Tim Gardner <tim.gard...@canonical.com>
Signed-off-by: Kamal Mostafa <ka...@canonical.com>
---
block/blk-mq.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 7f9b1f6..2192cf4 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -179,6 +179,8 @@ 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)]++;
}
--
1.9.1
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