block, bfq: move io_cq-persistent bfqq data into a dedicated struct
authorPaolo Valente <paolo.valente@linaro.org>
Tue, 3 Jan 2023 14:54:58 +0000 (15:54 +0100)
committerJens Axboe <axboe@kernel.dk>
Sun, 29 Jan 2023 22:18:32 +0000 (15:18 -0700)
commita61230470c8cbd4eec0dc4dd99a3867d009c0b05
tree253763728b5c153c1ba82aabc16ee77e01f5e9de
parentb752989897b4b71260e5456be16c44e9a96c999b
block, bfq: move io_cq-persistent bfqq data into a dedicated struct

With a multi-actuator drive, a process may get associated with multiple
bfq_queues: one queue for each of the N actuators. So, the bfq_io_cq
data structure must be able to accommodate its per-queue persistent
information for N queues. Currently it stores this information for
just one queue, in several scalar fields.

This is a preparatory commit for moving to accommodating persistent
information for N queues. In particular, this commit packs all the
above scalar fields into a single data structure. Then there is now
only one field, in bfq_io_cq, that stores all the above information. This
scalar field will then be turned into an array by a following commit.

Suggested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Gianmarco Lusvardi <glusvardi@posteo.net>
Signed-off-by: Giulio Barabino <giuliobarabino99@gmail.com>
Signed-off-by: Emiliano Maccaferri <inbox@emilianomaccaferri.com>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
Link: https://lore.kernel.org/r/20230103145503.71712-4-paolo.valente@linaro.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
block/bfq-iosched.c
block/bfq-iosched.h