On Sun, May 11, 2008 at 11:17:03PM -0700, Jeremy Higdon wrote: > On Thu, Mar 20, 2008 at 03:20:10AM -0700, Andrew Morton wrote: > > > > I also suspect that CTQ has not been set up correctly on this > > > > kernel, because: > > > > > > > > $ cat /sys/block/sdb/device/queue_depth > > > > 3 > > > > $ ls -l /sys/block/sdb/device/queue_depth > > > > -r--r--r-- 1 root root 0 Mar 20 09:59 /sys/block/sdb/device/queue_depth > > > > $ > > > > > > > > It appears to be hard coded to 3 and can't be changed.... > > > > > > That's a bug in the qla1280 driver. I thought that had gotten fixed. > > > It's looking at the wrong mailbox register after setting device parameters. > > > > Was there a patch anywhere? > > Promised patch... .... > After the fix, I found that my disks were getting a queue depth of > 255, which is far too many. Most SCSI disks are limited to 32 or > 64. In any case, there's no point, queueing up a bunch of commands > to the adapter that will just result in queue full or starve other > targets from being issued commands due to running out of internal > memory. So I dropped default queue depth to 32 (from which 1 is > subtracted elsewhere, giving net of 31). > > I tested with a Seagate ST336753LC, and results look good, so > I'm satisfied with this patch. > > Signed-off-by: Jeremy Higdon <jeremy@xxxxxxx> Works fine here. Tested-by: Dave Chinner <dgc@xxxxxxx> Cheers, Dave. -- Dave Chinner Principal Engineer SGI Australian Software Group -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
