On Sat, 2017-10-14 at 02:05 +0800, Ming Lei wrote: > In the following patch, we will implement scsi_get_budget() > which need to call scsi_prep_state_check() when rq isn't > dequeued yet. My understanding is that this change is only needed because scsi_mq_get_budget() calls scsi_prep_state_check() with the req argument set to NULL. Since scsi_prep_state_check() tests for sdev states other than SDEV_RUNNING and since the purpose of this series is to optimize performance for the case SDEV_RUNNING I'm not sure it's a good idea to make scsi_mq_get_budget() call scsi_prep_state_check(). And if scsi_mq_get_budget() wouldn't call scsi_prep_state_check() then this patch is not necessary. Bart.
