> On Sat, 12 May 2007 17:42:00 +0900 (JST)
> yamt@mwd.biglobe.ne.jp (YAMAMOTO Takashi) wrote:
> 
> > > Andrew (or someone else), do you know what is it? I mean, why do
> > > I have to change all mutexes inside of the callout to IPL_SOFTCLOCK?
> > 
> > have you read mutex(9)?
> 
> Yes, many times... there's no mention about when to use different
> IPL types or when you shouldn't mix them.

from mutex(9):
	Adaptive mutexes should not be acquired from an interrupt handler.

> That means that I'll have to change the ACPI mutex to IPL_SOFTCLOCK
> to be happy with envsys2, or do you have any better suggestion?

or make your code be executed in thread context.

YAMAMOTO Takashi