On Saturday, September 20, 2003, at 03:30  AM, Manuel Bouyer wrote:

> Yes, and the kernel thread will help for this too. But I have no ETA 
> for this
> yet. I'd like to get hot-plug before.

OK.  Hot-plug for SATA is something I've been thinking about.  You need 
some chip-specific code to detect the PHY status change.

Regarding tagged queueing, the Intel SATA chip (31244) has a mode 
called "DPA mode", which basically presents 4 logical controllers, one 
for each SATA port, with slightly different register offsets than the 
PCI IDE-compatible mode ("legacy mode").  In DPA mode, the 31244 
supports tagged queueing, and the performance is quite good when it is 
used.

         -- Jason R. Thorpe <thorpej@wasabisystems.com>