[PATCH] ASR driver update

[Scott Long]

Don Bowman wrote:
> 
> OK, the system with the 2010 boots now. It has 1TB of disk
> space, 4GB of ram, and is running a bunch of postgresql databases.
> 

Excellent!

> One thing...
> I had 'link    rasr0   rdpti0' in /etc/devfs.conf 
> so that the asr raidutils would work. With your changes,
> this no longer works. I no longer have an 'rasr0', but
> instead a 'asr0'. If i link this to 'rdpti0', then
> raidutil works again.

I changed this with rev 1.55, among other things.  The source
to the raidctl util is available, so once I'm done fixing the
management interface (there is a lot more work to go on this,
btw), I'll fix raidutil and make it into a new port.

> 
> I've done a bunch of dd to and from disk with success, 
> and the postgres' seem to be ok.
> 
> 
> The performance is nothing to write home about, about
> 22MB/s on write (to filesystem from /dev/zero), and 
> only about 10MB/s on read (from /dev/da0 to /dev/null).
> I don't know how to tell if i'm getting errors or anything
> with this driver. I'm not sure what i had before this change,
> i'll try and re-run the test.

I wouldn't expect the performance to change much.  The generated
assembly for the changed functions is nearly the same as before.
The big benefit is that the driver should have a better chance
of working on non x86 systems, possibly even amd64.

Thanks again for testing this.

Scott