Re: Kernel modules not loading on 15-prerelease

On Fri, Sep 05, 2025 at 09:17:06AM -0700, Mark Millard wrote:
> 
> > Run # make cleanworld once.
> 
> In your odd context, "make clean" may well be better
> for before starting the builds.

Interestingly, "make clean" wasn't successful, but make 
cleandir resulted in a new build of kernel and modules. 

> > If objects don't have .meta files then META_MODE won't do the right thing on an incremental build. 1
> > FreeBSD buildworld will now create meta files to improve the performance of future builds.
> 
> So: how to get a valid kernel/module-set without
> first building all of the world:
> 
> FIRST: deal with having /etc/src-env.conf include a
> line with:
> 
> WITH_META_MODE=
> 
> (Your choice if you want the YES or some text.)
> 
> NOTE: I make the assumption that you want to use
>       /etc/src-env.conf instead of command line
>       content.

As a matter of curiosity, is /usr/local/etc/src-env.conf
in the search path? This seems like a local parameter.

> # cd /usr/src/ # (or where ever you have your source)
> # make clean # not something that you would normally do
> # make kerneltoolchain

I'd forgotten about the kernel-toolchain target. That
sped things up considerably.

> 
> NOTE: I do not know your detailed choices about handling
>       kernel updates so you may have more related to the
>       installkernel than I show. For example, you might
>       deliberately keep a copy of the old kernel under
>       some alternate name before updating the default
>       named one. (There are other possibilities.)

Ordinarily, I do not. If trouble is expected I often 
cp -R boot/kernel.old /boot/kernel.spare for an extra
level of redundancy. 
 
> 
> kldload -n filemon
> cd /usr/src/ # or my equivalent for a specific source tree
> 
> That is in order to establish context for later commands
> in the script and for META_MODE use.
> 
> I happen to choose to not start filemon unless I'm
> starting a system software build, avoiding any overhead
> if I've not done any system builds yet.

That seems a good idea which never crossed my mind... 
Is there any estimate how much overhead filemon imposes? 

Many thanks for your help. My misunderstanding of meta-mode
use was rather profound.

bob prohaska