sched_{4bsd,ule}.4: sync current scheduler sysctls

[mchoo]

Summary

MFC after: 2 weeks
Sponsored by: FreeBSD Foundation

[mchoo]

Remove kern.sched.preemption (This is shared between 4BSD and ULE, so it should be in scheduler.4)

[ziaee]

In D60002#1376597, @mchoo wrote:

Remove kern.sched.preemption (This is shared between 4BSD and ULE, so it should be in scheduler.4)

It's really nice to move it from here in the commit where you're adding that, that way you're not creating a state where that part of the docs is temporarily missing.

[olce]

In D60002#1376632, @ziaee wrote:

It's really nice to move it from here in the commit where you're adding that, that way you're not creating a state where that part of the docs is temporarily missing.

It's better in general, but that does not always happen (see discussion we had in D54881). Minsoo has nothing to do with the situation here, the change was introduced in eb454937a3c0 ("sys: Move ULE sysctls under kern.sched.ule"), so if anyone is to blame, it's kib@ and in part myself as a reviewer (and I did bad when approving the change, on multiple levels).

[olce]

In D60002#1376632, @ziaee wrote:

It's really nice to move it from here in the commit where you're adding that, that way you're not creating a state where that part of the docs is temporarily missing.

Oh, my bad, you were talking about kern.sched.preemption... I agree with that.