Re: Current ULE state and plans (was Re: HMP scheduling on FreeBSD)

On Thu, Jan 29, 2026 at 11:58:02AM -0800, Steve Kargl wrote:
> On 1/22/26 11:21, Konstantin Belousov wrote:
> > Selecting an arbitrary message to reply in the thread.
> > Also added arch@, perhaps hackers@ should be dropped for replies.
> > 
> > I wrote a patch that allows to compile both ULE and 4BSD into same kernel,
> > and select the scheduler at boot.  See https://reviews.freebsd.org/D54831
> > First comment on the review contains important usage information and
> > some special note about armv7.
> > 
> 
> Kib,
> 
> Thanks for working on this feature!  I see that it
> has handed in /usr/src, and I've just completed a
> buildworld/buildkernel dance.
> 
> I looked in /usr/src/UPDATING for a blurb describing
> how to select the scheduler.  There isn't one (as
> you likely know).  I assume I need to set
> 
> kern.sched.name=ULE
> 
> or 4BSD /boot/loader.conf.

Right.  The list of the available i.e. compiled in schedulers is provided
by kern.sched.available.  Then sysctl kern.sched.name shows the selected
one.