On Wed, Sep 19, 2018 at 11:52:21AM +0800, jianchao.wang wrote: > Hi Ming > > On 09/18/2018 08:15 PM, Ming Lei wrote: > > The adminq request can be quisced in the scsi_device level, just as normal IO > > request, because the scsi_device instance is same with normal IO. > > Yes, the scsi_queue_rq->scsi_prep_state_check could gate things out of. > > > > > But in blk-mq level, this admin queue won't be quiesced or frozen at all. > > But the scsi_queue_rq/scsi_request_fn will be invoked, right ? > > This is different from the original implementation. For legacy path, as you mentioned, scsi_prep_fn() will work, then scsi_request_fn() won't be called. For blk-mq, scsi_queue_rq() is always called, and that is a bit different, but the result is fine given admin request is submitted much less frequently. Thanks, Ming
