Re: [PATCH] ublk: drop the device reference outside ublk_ctl_mutex in DEL_DEV

[Jens Axboe]

On Thu, 01 Oct 2026 11:10:47 +0800, Qiliang Yuan wrote:
> ublk_ctrl_del_dev() drops its reference to the device while holding the
> global ublk_ctl_mutex. When this is the last reference, ublk_cdev_rel()
> frees the tag set, and blk_mq_free_tag_set() waits for the pending SRCU
> callbacks of the tag set with srcu_barrier(). Every DEL_DEV thus waits
> for an SRCU grace period with the mutex held, and deleting devices from
> several threads serializes on it.
> 
> [...]

Applied, thanks!

[1/1] ublk: drop the device reference outside ublk_ctl_mutex in DEL_DEV
      commit: 812485c8ff2609489b164415befc7189965e1b38

Best regards,
-- 
Jens Axboe