migrating proc from zone to objcache

[Nicolas Thery]

2008/4/1, Nicolas Thery <nthery at gmail.com>:
> I ran make buildworld twice with procs in objcache and twice with
>  procs allocated thru kmalloc() on a UP system.  The runtime is
>  identical in both cases and the ram footprint presumably smaller with
>  kmalloc().  (Admittedly, 2 runs are not much for stat purpose but
>  buildworld takes time.)
>
>  I'm now running buildworld with procs in zones.

Same duration with zone.

>  I gave a quick look at struct proc and I admit that there isn't much
>  for pre-initialization as an instance inherits lots of stuff from its
>  parent.  I'll look at it again today more thoroughly.
>
>  So, I'm inclined toward using kmalloc() right now.  More on this
>  tonight.  It's time to go to my real job :-)

I'll go for kmalloc() for now as I'm a bit wary of changing the proc
construction/destruction code and I don't think there is much to
factor out.  Anyway, there are very few lines of code impacted, so
changing again in the future is no big deal.