On Tue, Sep 18, 2018 at 09:17:12AM +0800, jianchao.wang wrote: > Hi Ming > > On 09/17/2018 08:07 PM, Ming Lei wrote: > >>> This way will delay runtime pm or system suspend until the queue is unfrozen, > >>> but it isn't reasonable. > >> This interface is for the __scsi_execute only, before we call into function, we should have > >> get the device resumed synchronously. > > I mean when the queue is frozen, it is reasonable to runtime suspend the queue. However, > > blk_queue_preempt_enter() is still waiting for queue becoming unfreezing first. > > We don't freeze the queue, but set preempt-only mode when suspend the queue. :) But the queue can be frozen by other paths. Even though it is frozen, the queue should be allowed to suspend too. Thanks, Ming
