On Tue, 2016-12-20 at 10:15 -0800, Peter Chang wrote: > we discovered this when futzing w/ the queue depth parameter for ata > disks behind the pm8006 controller. setting depth == 1 should disable > ncq, but the sysfs part silently fails and we continue sending the > fpdma command variants. no one else probably cares about the > disabling ncq path, but we do like to test.
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. James > anyway, adding both the ide and scsi lists because i'm not quite sure > there's a separate libsas list and a single commit seems better for > this. -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
