On 11.08.2018 14:23, Ming Lei wrote:
Please test for-4.19/block:


This slow boot issue should have been fixed by the following commits:

1311326cf475 blk-mq: avoid to synchronize rcu inside blk_cleanup_queue() 97889f9ac24f blk-mq: remove synchronize_rcu() from blk_mq_del_queue_tag_set() 5815839b3ca1 blk-mq: introduce new lock for protecting hctx->dispatch_wait
2278d69f030f blk-mq: don't pass **hctx to blk_mq_mark_tag_wait()
8ab6bb9ee8d0 blk-mq: cleanup blk_mq_get_driver_tag()

Indeed, I can confirm that these commits fix the issue.

Thanks a lot.

  Oleksandr Natalenko (post-factum)

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