Previous patch: https://lkml.org/lkml/2021/7/11/343 If there are multiple active queues while sharing a tag set, the available tags is limit to fair share for each active queue. This patchset take off such restriction if no one ever failed to get driver tag. Yu Kuai (3): blk-mq: add new interfaces to track if hctx failed to get driver tag blk-mq: record how many hctx failed to get driver tag while sharing a tag set blk-mq: allow hardware queue to get more tag while sharing a tag set block/blk-mq-debugfs.c | 2 ++ block/blk-mq-tag.c | 45 +++++++++++++++++++++++++++++++++++++++++- block/blk-mq-tag.h | 22 +++++++++++++++++++-- block/blk-mq.c | 13 +++++++++--- block/blk-mq.h | 4 ++++ include/linux/blk-mq.h | 12 +++++++++++ include/linux/blkdev.h | 2 ++ 7 files changed, 94 insertions(+), 6 deletions(-) -- 2.31.1
