On Wed, Sep 22, 2021 at 08:51:15PM +0800, Yu Kuai wrote: > Throttled bios can't be issued after queue is dying in > blk_cleanup_queue(), thus it's better to cancel them immediately > rather than waiting for throttle is done. > > For example, if user thread is throttled with low bps while is > issuing large io, and the device is deleted. The user thread will > wait for a long time for io to return. blk_cleanup_queue is too late, this will need to go into del_gendisk and on top of my "tear down file system I/O in del_gendisk" series.
