Re: [PATCH RFC] scsi: core: remove unsed 'restarts' from scsi_device

[Yu Kuai]

Hi,

> Hi,
>
> 在 2022/11/28 12:12, Ming Lei 写道:

> > BTW, why do you drive nvme via megaraid instead nvme driver?
> >
> > > And by the way, after Jan's patch "blk-mq: Improve performance of non-mq
> > > IO schedulers with multiple HW queues", scsi_run_queue_async() can only
> > > garantee to run hw queue for the current cpu, not all the hw queues.
> >
> > That isn't true, each hctx is still run in case of none & kyber 
> > scheduler.

And I really suspect that why Jan's patch can improve performance is
because it avoid many run queues from scsi_run_queue_async().

> Yes, but current default hctx shared elevator is deadline.
> > thanks,
> > Ming
> >
> > .
>
> .