Re: CVS commit: src/sys/external/bsd/drm2

[Jukka Ruohonen <jruohonen%iki.fi@localhost>]

On Thu, Apr 10, 2014 at 04:29:23AM +0000, Taylor R Campbell wrote:
>    Date: Wed, 9 Apr 2014 20:30:24 +0300
>    From: Jukka Ruohonen <jruohonen%iki.fi@localhost>
> 
>    On Fri, Apr 04, 2014 at 11:47:47AM +0000, Taylor R Campbell wrote:
>    > For now, yes.  I can make it a sysctl, but do you have a suggestion
>    > for how to enable it at boot?  We don't have any notion of module
>    > parameters like Linux does.
> 
>    Hmm. modload(8)?
> 
> Thanks, I stand corrected.  Can parameters be passed in boot.cfg?  The
> i386/boot(8) man page is a little unclear to me.

Supposedly yes, but someone else needs to fill in the details. I do not know
what is the current state of the module discussion, but there are bigger
issues looming in the shadow.  At least there is no systematic way to pass
the parameters (cf. /etc/modprobe.d in Linux).

I think dholland@ was at some point discussing comparable config(1) issues. 
If there would be a systematic way, it would be easy to modularize for
instance the whole ISA stack, whereas now hardcoded parameters make this
impossible in practice. There are also many benefits.  Take the recent
addition of tpm(4) as an example: it hardcodes irq 7, and thus old school
setups with parallel printers are broken by design.

- Jukka.