misc/165208: Incorrect unit/description in `vm.vmtotal' output

[Arnaud Lacombe]

>Number:         165208
>Category:       misc
>Synopsis:       Incorrect unit/description in `vm.vmtotal' output
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Feb 16 18:00:24 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Arnaud Lacombe
>Release:        8-STABLE
>Organization:
n/a
>Environment:
% uname -a
FreeBSD shai 8.2-STABLE FreeBSD 8.2-STABLE #2: Mon May  9 14:29:02 EDT 2011
>Description:
The description "Free Memory Pages" from the output of `vm.vmtotal' is clearly wrong:

% sysctl vm.vmtotal
vm.vmtotal: 
System wide totals computed every five seconds: (values in kilobytes)
===============================================
Processes:              (RUNQ: 1 Disk Wait: 0 Page Wait: 0 Sleep: 147)
Virtual Memory:         (Total: 1075965600K, Active 2091112K)
Real Memory:            (Total: 199976K Active 122716K)
Shared Virtual Memory:  (Total: 63564K Active: 28088K)
Shared Real Memory:     (Total: 15200K Active: 11620K)
Free Memory Pages:      507564K

While the machine only really has 4G of memory, that's only at most 1 million pages. There is absolutely *no way* for this machine to have 519745536 free memory pages.
>How-To-Repeat:
run `sysctl vm.vmtotal', read output, think about what is written.
>Fix:
s/ Pages//.

and break the ABI for all the people parsing sysctl(8) output.

>Release-Note:
>Audit-Trail:
>Unformatted: