Hi Christoph, On Mon, Jul 18, 2022 at 08:29:28AM +0200, Christoph Hellwig wrote: > This was just a rather broken way to paper over a core block layer bug > that is now fixed. > > This reverts commit cebbe577cb17ed9b04b50d9e6802a8bacffbadca. This change will break START_DEV/STOP_DEV, which is supposed to run multiple cycles after the device is added, especially this way can help to implement error recovery from userside, such as one ubq_daemon is crashed/hang, the device can be recovered by sending STOP_DEV/START_DEV commands again after new ubq_daemon is setup. So here we do need separated request_queue/disk, and the model is similar with scsi's, in which disk rebind needs to be supported and GD_OWNS_QUEUE can't be set. Thanks, Ming
