On Thu, February 17, 2011 1:31 pm, Saman Barghi wrote: > Since I moved from FreeBSD I make assumptions, I thought it is enabled by > default which seems not to be case. I will build a custom kernel then (or > is there a better way !? ) But my question is, why UP is proffered > over SMP ?! > is there any specific reason !? Does DFBSD perform better in UP rather > than SMP mode ?! I just read that UP is the default mode forever ( > http://www.shiningsilence.com/dbsdlog/2010/10/26/6670.html), it is > interesting to know the reason though.
Just to clarify, it's not that it _will be_ UP forever, it's just that it always has been. A UP kernel will run in environments where a SMP kernel may have trouble - bad/wierd mptable, whatever, so this is playing it safe. If you boot a DragonFly CD/DVD, you have an option there of booting with a SMP kernel. If you install from there, you should also have a SMP kernel installed. If there's not too much on your DragonFly install, you could always completely reinstall. Otherwise, yes, rebuild the kernel.
