sysconf(3) extensions.

[Brooks Davis]

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.

+Note that it is possible for the product of this value and the value of
+.Li _SC_PAGE_SIZE
+to overflow.

This would be more clear if it said what was expected to overflow and
when.

-- Brooks
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