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blk-ioprio: Convert from rqos policy to direct call

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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 <damien.lemoal@opensource.wdc.com>
Tested-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20220623074840.5960-7-jack@suse.cz
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jan Kara
2022-06-23 09:48:32 +02:00
committed by Jens Axboe
parent f258654472
commit 82b74cac28
4 changed files with 23 additions and 45 deletions
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9
block/blk-ioprio.h
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@@ -6,14 +6,23 @@
#include <linux/kconfig.h>
struct request_queue;
struct bio;
#ifdef CONFIG_BLK_CGROUP_IOPRIO
int blk_ioprio_init(struct request_queue *q);
void blk_ioprio_exit(struct request_queue *q);
void blkcg_set_ioprio(struct bio *bio);
#else
static inline int blk_ioprio_init(struct request_queue *q)
{
return 0;
}
static inline void blk_ioprio_exit(struct request_queue *q)
{
}
static inline void blkcg_set_ioprio(struct bio *bio)
{
}
#endif
#endif /* _BLK_IOPRIO_H_ */