old top and new -current: missing arcstat sysctl

[Eitan Adler]

On Tue, 28 Aug 2018 at 22:46, Alexander Leidinger
<Alexander at leidinger.net> wrote:
> >
> > IIRC that would have been the inverted case of running a newer top(1)
> > with an older kernel lacking the v_laundry_pages sysctl.  In general I'd
> > expect us to support running an older top(1) with newer kernels if we
> > don't have to bend over backwards to provide compatibility.
>
> If the new top is summing the 3 up anyway, it sounds like we could
> provide the old one as backwards compatibility, even if it is
> redundant. I rather have an redundant counter and an old top working
> (in the generic case of what we promise to our users; in this specific
> case for me I just need to get around to update the jails on the
> corresponding systems), than bailing out without displaying anything.

I'd support this but don't feel like it justifies breaking the freeze.
After the 12.x freeze is over I'll implement this.




-- 
Eitan Adler