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block: don't call blk_throtl_stat_add for non-READ/WRITE commands

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blk_throtl_stat_add is called from blk_stat_add explicitly, unlike the
other stats that go through q->stats->callbacks.  To prepare for cgroup
data moving to the gendisk, ensure blk_throtl_stat_add is only called
for the plain READ and WRITE commands that it actually handles internally,
as blk_stat_add can also be called for passthrough commands on queues that
do not have a gendisk associated with them.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Andreas Herrmann <aherrmann@suse.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230203150400.3199230-2-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig 2023-02-03 16:03:42 +01:00 committed by Jens Axboe
parent 839c717bec
commit a886001c2d
1 changed files with 2 additions and 1 deletions
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3
block/blk-stat.c
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@ -58,7 +58,8 @@ void blk_stat_add(struct request *rq, u64 now)
value = (now >= rq->io_start_time_ns) ? now - rq->io_start_time_ns : 0;
blk_throtl_stat_add(rq, value);
if (req_op(rq) == REQ_OP_READ || req_op(rq) == REQ_OP_WRITE)
blk_throtl_stat_add(rq, value);
rcu_read_lock();
cpu = get_cpu();