kernel/block/blk-ioprio.h, branch linux-6.18.y

blk-ioprio: remove per-disk structure

2024-07-28T22:47:51Z

ioprio works on the blk-cgroup level, all disks in the same cgroup are the same, and the struct ioprio_blkg doesn't have anything in it. Hence register the policy is enough, because cpd_alloc/free_fn will be handled for each blk-cgroup, and there is no need to activate the policy for disk. Hence remove blk_ioprio_init/exit and ioprio_alloc/free_pd. Signed-off-by: Yu Kuai Reviewed-by: Christoph Hellwig Acked-by: Tejun Heo Reviewed-by: Bart Van Assche Link: https://lore.kernel.org/r/20240719071506.158075-4-yukuai1@huaweicloud.com Signed-off-by: Jens Axboe

blk-ioprio: pass a gendisk to blk_ioprio_init and blk_ioprio_exit

2022-09-27T01:09:31Z

Pass the gendisk to blk_ioprio_init and blk_ioprio_exit as part of moving the blk-cgroup infrastructure to be gendisk based. Signed-off-by: Christoph Hellwig Reviewed-by: Andreas Herrmann Acked-by: Tejun Heo Link: https://lore.kernel.org/r/20220921180501.1539876-8-hch@lst.de Signed-off-by: Jens Axboe

blk-ioprio: Convert from rqos policy to direct call

2022-06-27T12:29:12Z

Convert blk-ioprio handling from a rqos policy to a direct call from blk_mq_submit_bio(). Firstly, blk-ioprio is not much of a rqos policy anyway, it just needs a hook in bio submission path to set the bio's IO priority. Secondly, the rqos .track hook gets actually called too late for blk-ioprio purposes and introducing a special rqos hook just for blk-ioprio looks even weirder. Reviewed-by: Damien Le Moal Tested-by: Damien Le Moal Signed-off-by: Jan Kara Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20220623074840.5960-7-jack@suse.cz Signed-off-by: Jens Axboe

block: Introduce the ioprio rq-qos policy

2021-06-21T21:03:40Z

Introduce an rq-qos policy that assigns an I/O priority to requests based on blk-cgroup configuration settings. This policy has the following advantages over the ioprio_set() system call: - This policy is cgroup based so it has all the advantages of cgroups. - While ioprio_set() does not affect page cache writeback I/O, this rq-qos controller affects page cache writeback I/O for filesystems that support assiociating a cgroup with writeback I/O. See also Documentation/admin-guide/cgroup-v2.rst. Cc: Damien Le Moal Cc: Hannes Reinecke Cc: Christoph Hellwig Cc: Ming Lei Cc: Johannes Thumshirn Cc: Himanshu Madhani Signed-off-by: Bart Van Assche Link: https://lore.kernel.org/r/20210618004456.7280-5-bvanassche@acm.org Signed-off-by: Jens Axboe