Matthew Dillon wrote:
> :>     I'm just going to use this opportunity to plug the concept of temporary
> :>     sysctl-instrumentation for a commit like this.
> :
> :Overall, this is a good idea.  However, it can't apply to
> :any code that runs before init_main.c runs the SI_SUB_TUNABLES.
>     Sure it does, because it means you can simply commit a change to the
>     default assignment for that sysctl rather then backing the whole thing
>     out to unbreak the general developer community.  That saves a lot of
>     time and removes the 'oh hell, I have to track this down quickly!'
>     pressure.
>     Sometimes features in early boot can be adjusted by breaking into DDB
>     and w/l changing the sysctl variable, but perhaps not in this case.

Definitely not in this case.  Similarly, there are a
number of early allocations that occur by declaration,
rather than by process, where the page mappings are
then established post-facto, where it won't work.

I really need to publish my "early life of FreeBSD"
article.  8-(.  I have all my extensive notes together,
but I think it's at least a three-parter, and I need to
expand the examples.  I'll get around to it eventually,
I promise.

-- Terry

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