cvs commit: src/sys/kern subr_param.c

[Kostik Belousov]

On Fri, May 09, 2008 at 11:59:11AM +0200, Pawel Jakub Dawidek wrote:
> On Fri, May 09, 2008 at 11:56:14AM +0200, Oliver Fromme wrote:
> > 
> > Pawel Jakub Dawidek wrote:
> >  > On Fri, May 09, 2008 at 11:08:20AM +0200, Oliver Fromme wrote:
> >  > > Pawel Jakub Dawidek wrote:
> >  > >  >   Modified files:
> >  > >  >     sys/kern             subr_param.c=20
> >  > >  >   Log:
> >  > >  >   - Export HZ value via kern.hz sysctl (this is the same name as for the
> >  > >  >     loader tunable).
> >  > > 
> >  > > It's probably just me, but I don't see the usefulness of
> >  > > this.  The HZ value is already exported via kern.clockrate.
> >  > > (I'm not saying the change is wrong, I'm just looking for
> >  > > an explanation.)
> >  > 
> >  > The reason for this change was that I was trying to recall what is
> >  > the name of the tunable and I wasn't able to find it with simple
> >  > "sysctl -a | grep hz". In an ideal world most of not all loader
> >  > tunables should also be visible as read-only sysctls.
> > 
> > Hm.  It was my understanding that the loader tunables
> > are already exported via kenv(2), so typing "kenv"
> > should include them all.  I was probably wrong, though.
> 
> Only the one that are set (eg. by hints or by you in loader.conf).
> kenv(1) doesn't list all the tunables.

Meantime, all of the *siz ought to be writable sysctls. Roman Divacky had
the patches, I think they finally shall be committed.
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