[parisc-linux] "I/O MMU is out of mapping resources" while a base install into HP C200

[Grant Grundler]

On Sat, Feb 04, 2006 at 06:52:47PM +0900, yong Jung wrote:
> Hellow debian lovers,
> .
> Could you give me a favor to check my install problem
> on C200 machine ?

Hi Yong.
You are the 3rd person in the past week or so to report this problem. :)
It was fixed here:
| revision 1.18
| date: 2005/03/06 23:48:39;  author: grundler;  state: Exp;  lines: +34 -32
| branches:  1.18.2;  1.18.4;
| 
| 2.6.11-pa2 - ditch ccio_mem_ratio. "Ported" from similar change to sba driver.

I'm told debian-31r1a-hppa-netinst.iso uses 2.6.8.1.

Workaround is to reduce the number of outstanding scsi commands
and thus reduce the amount of total I/O "in flight".

You can do this by setting "queue_depth" to 1.
Offhand I only know about /sys entries:
	find /sys -name queue_depth 

and then "echo 1 > /sys/devices/...../queue_depth"

Or can someone remind me how to globally do that from the command line?
google isn't finding it for me today.

grant