On Sat, 30 Aug 2025 10:18:18 +0800, Ming Lei wrote:
> Replace the spinlock in blk_mq_find_and_get_req() with an SRCU read lock
> around the tag iterators.
>
> Avoids scsi_host_busy() lockup during scsi host blocked in case of big cpu
> cores & deep queue depth.
>
> Also the big tags lock isn't needed when reading disk sysfs attribute
> 'inflight' any more.
>
> [...]
Applied, thanks!
[1/5] blk-mq: Move flush queue allocation into blk_mq_init_hctx()
commit: aba19ee71cd7c0253612d6a2a0b3a828ba9ece29
[2/5] blk-mq: Pass tag_set to blk_mq_free_rq_map/tags
commit: 9ad8e5af327904dcc52e64ee5ab731c7018ffb0f
[3/5] blk-mq: Defer freeing of tags page_list to SRCU callback
commit: ad0d05dbddc1bf86e92220fea873176de6b12f78
[4/5] blk-mq: Defer freeing flush queue to SRCU callback
commit: 135b8521f21d4d4d4fde74e73b80d8e4d417e20a
[5/5] blk-mq: Replace tags->lock with SRCU for tag iterators
commit: 995412e23bb2560a73db444e4c60bf5826b33aaa
Best regards,
--
Jens Axboe
