RFC: ATA to CAM integration patch

[Kamigishi Rei]

Alexander Motin wrote:
>> ahcich1: ALL SLOTS BUSY!
>> Is it purely informational or does it indicate a problem? (I'm using 
>> Intel Q35+ICH9 in AHCI mode.)
> It is bad. It must never happen. It means that driver got more 
> commands then it has empty slots available. Results can be unpredictable.
> How have you manage it? Were there any other messages around?
No other messages. Going to try your patch from the followup message.
Basically, I did nothing out of the ordinary. I'm running mysqld, 
postgres, and two lighttpds in jails, one of the lighttpds is serving 
huge media files.
The messages appeared mostly during "make buildworld" for one of the 
GEOM_MIRROR drives (/usr/obj operations probably) and for one of raidz1 
drives (where /usr/src resides).

--
Kamigishi Rei
KREI-RIPE