kern/83121: wrong SACK statistic in netstat -s

[Den Ivanov]

>Number:         83121
>Category:       kern
>Synopsis:       wrong SACK statistic in netstat -s
>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:   Fri Jul 08 01:50:12 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Den Ivanov
>Release:        FreeBSD 5.4-STABLE
>Organization:
Vladnet
>Environment:
FreeBSD web2.vladnet.ru 5.4-STABLE FreeBSD 5.4-STABLE #8: Fri Apr  8 20:32:29 GMT 2005     div at web2.vladnet.ru:/var/cvsup/src/STABLE_5/obj/var/cvsup/src/STABLE_5/src/sys/WEB  i386
>Description:
This is Dual Xeon machine with 4G of memory,
SACK disabled (net.inet.tcp.sack.enable: 0)
but netstat -s say:
------------
        0 SACK recovery episodes
        0 segment rexmits in SACK recovery episodes
        0 byte rexmits in SACK recovery episodes
        0 SACK options (SACK blocks) received
        0 SACK options (SACK blocks) sent
        3217025016 SACK scoreboard overflow
------------
>How-To-Repeat:
try "netstat -s"
>Fix:
      
>Release-Note:
>Audit-Trail:
>Unformatted: