sysconf(3) extensions.

[Rong-en Fan]

On 11/2/06, Pawel Jakub Dawidek <pjd at freebsd.org> wrote:
> On Wed, Nov 01, 2006 at 01:59:52PM -0600, Brooks Davis wrote:
> > On Wed, Nov 01, 2006 at 08:46:18PM +0100, Pawel Jakub Dawidek wrote:
> > > On Wed, Nov 01, 2006 at 01:24:57PM -0600, Brooks Davis wrote:
> > > > On Wed, Nov 01, 2006 at 08:06:06PM +0100, Pawel Jakub Dawidek wrote:
> > > > > Hi.
> > > > >
> > > > > I'd like to add two non-standard value to the sysconf(3) functions,
> > > > > which can be found in both Solaris and Linux: _SC_PHYS_PAGES and
> > > > > _SC_AVPHYS_PAGES.
> > > > >
> > > > > The patch is here:
> > > > >
> > > > >         http://people.freebsd.org/~pjd/patches/sysconf.patch
> > > > >
> > > > > Can someone review it? Thanks.
> > > >
> > > > What are they for?  My concern is that _SC_AVPHYS_PAGES isn't going to
> > > > semantically match other platforms since in a steady state the free count
> > > > is small on FreeBSD, but on other systems it swings quite a bit based on
> > > > load.
> > >
> > > _SC_PHYS_PAGES is used by libzpool (a part of the ZFS file system).
> > > _SC_AVPHYS_PAGES I used more for completness.
> >
> > OK.  I'd be somewhat inclined to leave _SC_AVPHYS_PAGES out in that
> > case, but I don't feel strongly about it.
>
> I've no opinion, I can remove it.

What's the status of _SC_PHYS_PAGES? I'm porting mbuffer [1], which
uses _SC_PHYS_PAGES.

Regards,
Rong-En Fan

[1] http://www.maier-komor.de/mbuffer.html