Darren Reed writes:
> can someone explain why I am seeing these ?
> 
> Jun 20 02:00:53 netbsd /netbsd: APM set CPU idle:unknown error code? (83)

Because our APM support sucks and needs fixing. Were I you, I'd dike
APM out of your kernel -- I assume this is a desktop, not a laptop.

> Jun 19 23:59:12 netbsd /netbsd: /usr: optimization changed from TIME to SPACE
> Jun 19 23:59:29 netbsd /netbsd: /usr: optimization changed from SPACE to TIME
> 
> and /usr is:
> 
> /dev/wd1f          175663    89250    77629    53%    /usr

If /usr didn't cross 90% full at some point recently due to some
transient, perhaps its parameters are fucked. See tunefs(8)...

Perry