Colplugging modules for ACPI devices

Colplugging modules for ACPI devices

[thermal]

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Hi

I`ve recently been working on using coldplug scripts to load ACPI 
modules into the kernel (button, battery, etc.). I`ve written an agent 
and an *.rc script for the ACPI namespace. It uses _HID identifiers 
exported via sysfs (requires a patch in the kernel recently posted to 
linux-acpi mailing list) and uses a hand-build modules.acpimap to 
resolve modules. The script itself is somewhat dump (e.g. it doesn`t 
check whether a module is already loaded) but does it`s work nicely at 
least on my 2 desktop machines. Haven`t tried it on a laptop though. 
What do you think about this idea ?


-- 
|   ******* Maciek Grela RV409b *********
|        JID: thermal@jabber.wroc.pl
| Linux user #319794 ++ There is no spoon ...

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Re: Colplugging modules for ACPI devices

[Marco d'Itri]

On Jul 09, thermal@o2.pl wrote:

> What do you think about this idea ?
You wasted your time...
Hotplug is obsolete and you will not find it in modern distributions.
Maps are obsolete too, nowadays drivers are loaded using udev and
$MODALIAS.

The first step to correctly fix this is to design an aliases scheme and
then add the aliases to the drivers.
I am not sure if it would be appropriate for the kernel to generate an
uevent for every node of the ACPI namespace tree, if not you would need
to walk it with a script, synthesize the $MODALIAS value and run
modprobe for every node.
Both ways look a bit expensive to me since modprobe would be forked
tens of times.

-- 
ciao,
Marco


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