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block/bfq: Enable I/O statistics 

BFQ uses io_start_time_ns. That member variable is only set if I/O
statistics are enabled. Hence this patch that enables I/O statistics
at the time BFQ is associated with a request queue.

Compile-tested only.

Reported-by: Cixi Geng <cixi.geng1@unisoc.com>
Cc: Cixi Geng <cixi.geng1@unisoc.com>
Cc: Yu Kuai <yukuai3@huawei.com>
Cc: Paolo Valente <paolo.valente@unimore.it>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Bart Van Assche 2022-06-13 09:32:34 -07:00 committed by Jens Axboe
parent 6cfeadbff3
commit b96f3cab59
1 changed files with 3 additions and 0 deletions
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3
block/bfq-iosched.c
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@ -7046,6 +7046,7 @@ static void bfq_exit_queue(struct elevator_queue *e)
spin_unlock_irq(&bfqd->lock);
#endif
blk_stat_disable_accounting(bfqd->queue);
wbt_enable_default(bfqd->queue);
kfree(bfqd);
@ -7192,6 +7193,8 @@ static int bfq_init_queue(struct request_queue *q, struct elevator_type *e)
blk_queue_flag_set(QUEUE_FLAG_SQ_SCHED, q);
wbt_disable_default(q);
blk_stat_enable_accounting(q);
return 0;
out_free: