isp issues on recent -STABLE

[Geoff Buckingham]

On Fri, Aug 11, 2006 at 06:53:03AM -0500, Eric Anderson wrote:
> [..snip..]
> Aug  9 23:02:10 snapshot1 kernel: isp0: command timed out for 0.2.2
> Aug  9 23:02:10 snapshot1 kernel: (da8:isp0:0:2:2): Command timed out
> Aug  9 23:02:10 snapshot1 kernel: (da8:isp0:0:2:2): Retrying Command
> Aug  9 23:26:58 snapshot1 kernel: (da3:isp0:0:1:0): Queue Full
> Aug  9 23:26:58 snapshot1 kernel: (da3:isp0:0:1:0): tagged openings now 254

I don't what may have changed in the driver recently, but from your post
you seem to be using the FC isp and potentially a "SAN" presenting arrays as 
luns to you rather than JBOD on a loop or switch.

If you you have some kind of data mover presenting arrays, your SAN vendor 
may well recomend a maximum queue size per lun (often 20-30)

man camcontrol, look at the tags section.

Your commands may be timing out because you have managed to queue too many 
command (which I hope should not happen). Or.....

Your queues could be filling because your commands are timing out. Which
would imply something is broke :-(