blk-iocost: account zone append completions in latency stats

ioc_rqos_done() only accounts READ and WRITE completions, so zone
append completions are excluded from the latency window: the vrate
feedback loop cannot see ZA-induced latency, leaving it unable to
respond to device saturation caused by zone appends.  Similarly,
calc_size_vtime_cost_builtin() does not classify zone append as a
write operation.

Charging (the cost model) and feedback (the latency window) are
separate mechanisms, so this is not covered by the previous patch
that prices zone appends.

Treat zone append as WRITE for both latency accounting and cost
classification.

Fixes: 0512a75b98f8 ("block: Introduce REQ_OP_ZONE_APPEND")
Signed-off-by: Tao Cui <cuitao@kylinos.cn>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://patch.msgid.link/20260922043856.2020116-4-cui.tao@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>

0 files changed, 0 insertions, 0 deletions