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| author | Ming Lei <ming.lei@redhat.com> | 2021-05-11 23:22:33 +0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-05-24 06:47:21 -0600 |
| commit | 84da7acc3ba53af26f15c4b0ada446127b7a7836 (patch) | |
| tree | b9b3f6491319d187f8a66f5fcaff30d6941c818a /block/blk-flush.c | |
| parent | 8c390ff910c5500fc16cca6f90ac2a60c7c84979 (diff) | |
| download | linux-84da7acc3ba53af26f15c4b0ada446127b7a7836.tar.bz2 | |
block: avoid double io accounting for flush request
For flush request, rq->end_io() may be called two times, one is from
timeout handling(blk_mq_check_expired()), another is from normal
completion(__blk_mq_end_request()).
Move blk_account_io_flush() after flush_rq->ref drops to zero, so
io accounting can be done just once for flush request.
Fixes: b68663186577 ("block: add iostat counters for flush requests")
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: John Garry <john.garry@huawei.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20210511152236.763464-2-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-flush.c')
| -rw-r--r-- | block/blk-flush.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/block/blk-flush.c b/block/blk-flush.c index 7942ca6ed321..1002f6c58181 100644 --- a/block/blk-flush.c +++ b/block/blk-flush.c @@ -219,8 +219,6 @@ static void flush_end_io(struct request *flush_rq, blk_status_t error) unsigned long flags = 0; struct blk_flush_queue *fq = blk_get_flush_queue(q, flush_rq->mq_ctx); - blk_account_io_flush(flush_rq); - /* release the tag's ownership to the req cloned from */ spin_lock_irqsave(&fq->mq_flush_lock, flags); @@ -230,6 +228,7 @@ static void flush_end_io(struct request *flush_rq, blk_status_t error) return; } + blk_account_io_flush(flush_rq); /* * Flush request has to be marked as IDLE when it is really ended * because its .end_io() is called from timeout code path too for |