reading kernel tunables from userland ?

[Luigi Rizzo]

On Wed, Apr 23, 2008 at 02:14:02PM +0400, pluknet wrote:
> Hello,
> 
> 2008/4/23 Luigi Rizzo <rizzo at iet.unipi.it>:
> > sorry for the possibly naive question, but is there
> >  a way other than sysctl to read the value of kernel 'tunable'
> >  variables ?
> >
> >  E.g. in if_nfe.c i see
> >
> >  TUNABLE_INT("hw.nfe.msi_disable", &msi_disable);
> >  TUNABLE_INT("hw.nfe.msix_disable", &msix_disable);
> >  TUNABLE_INT("hw.nfe.jumbo_disable", &jumbo_disable);
> >
> >  but sysctl is reporting none of them.
> >
> >  I seem to remember that there was a separate command to access
> >  kernel tunables,
> >  but cannot remember which one, and neither 'man -k tunable'
> >  nor a google search return any useful answer...
> 
> Perhaps are you about kenv ?

yes, thanks...