Re: Periodic rant about SCHED_ULE

From: Guido Falsi <>
Date: Thu, 23 Mar 2023 10:26:44 UTC
On 23/03/23 11:03, David Chisnall wrote:
> On 22/03/2023 18:03, George Mitchell wrote:
>> Rebuilding the kernel is the only way I know.  In an ideal world, the
>> scheduler would be a loadable kernel module (if that's even possible),
> Solaris supports multiple schedulers, as I believe does Linux, but I 
> think in both cases it's a boot-time option.  It's been too long since I 
> looked at the early boot order to know if there's anything that handles 
> linking the loader-provided modules that depends on any scheduler data 
> structures.  Doing that audit and ensuring that there aren't would be 
> the first step.  From there, it should be mostly build-system 
> infrastructure to allow building the two schedulers as modules and 
> switching between them at boot.

I guess this will be somewhat provided once we get pkgbase.

At that point multiple kernel packages can be distributed and the user 
chooses which one gets loaded.

Guido Falsi <>