On (04/02/18 13:14), wen.yan...@zte.com.cn wrote:
>
> > It's true that this print for the same device is useless. But it's
> > useful for different devices. Is it possible to limit the print only
> > for the same device?
>
> In our scene, it's just for the same device (q->queuedata), Thanks.
Yes, what Jason meant was that rate limit struct is shared by different call
sites - including scsi_request_fn() from different devices.
If device1->scsi_request_fn()->sdev_printk_ratelimited() causes printk rate
limit, then messages from device2->scsi_request_fn()->sdev_printk_ratelimited()
may be lost entirely, unless you have enough of them.
-ss
