Performance of 4.x vs 5.x (Re: Lifetime of FreeBSD branches)

[martinko]

Kris Kennaway wrote:
> 
> Also try defining PREEMPTION in your kernel on 5.x and above (if you
> are running i386 or amd64).  There have been very occasional reports
> of panics with this option enabled (although I use it everywhere and
> have not seen problems on my heavily loaded machines), but interactive
> response should be much better.
> 

kris,

i cannot find (a description of) PREEMPTION in NOTES or GENERIC (on 5.4 
on i386).

am i missing something?

cheers,

martin