On Sun, Mar 07, 2010 at 06:43:49PM +0900, Masao Uebayashi wrote:
> Where component devices are symlinks to the real instances
>
> /dev/pseudobus0/raid0/component0
> -> /dev/mainbus/pci0/ppb0/piixide0/atabus0/wd1/disk0/diskpart0
I already pointed this out on port-i386@, but theoretically this sounds like
a good thing for the ACPI side of things where "pseudo" (ACPI) devices need
to be matched with "real" devices.
As an example: one thing that holds back the ACPI CPU code I am working on
is that I need to be sure that e.g. cpu3 that attaches to acpi0 is the same
cpu3 that has attached to mainbus0. So:
/dev/acpi0/cpu3
-> /dev/mainbus0/cpu3
No idea how this works in practice (frankly, I find autoconfiguration scary).
- Jukka.
PS. Another example is the Grégoire Sutre's work with ACPI display devices;
http://mail-index.netbsd.org/tech-kern/2010/01/20/msg006983.html
