On Tue, Dec 20, 2016 at 10:30:34AM -0800, James Bottomley wrote: > I'd actually disagree with this assertion; it's why tagging (what you > mean by ncq) and queue depth are separate. Queue depth represents the > number of outstanding commands we sent on the wire; however, it often > excludes things like sense probes and error handling commands, so > tagged depth==1 is a different operating environment from untagged. > Some transports actually have no untagged variant nowadays, so it's > physically impossible to disable tagging. Yes. We have the queue_type sysfs file that also used to be writeable and allow changing the queue type, but it's never been used for anything. For debugging you can clear the tagged_supported flag in the driver, but there should be no reason for doing that during normal operation for a SAS HBA driver. -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
