misc/163680: negative values in vmstat -z

[Eugen Konkov]

>Number:         163680
>Category:       misc
>Synopsis:       negative values in vmstat -z
>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:   Wed Dec 28 20:50:11 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Eugen Konkov
>Release:        9.0-CURRENT
>Organization:
ISP FreeLine
>Environment:
# uname -a
FreeBSD flux 9.0-CURRENT FreeBSD 9.0-CURRENT #4: Fri Jun 10 01:30:12 UTC 2011     @:/usr/obj/usr/src/sys/PAE_KES  i386

>Description:
I am doing frequently these commands and catch this one:

# vmstat -z | egrep 'ITEM|NetG'
ITEM                   SIZE  LIMIT     USED     FREE      REQ FAIL SLEEP
NetGraph items:          36,  65549,      55,     771,614725436,   0,   0
NetGraph data items:     36,  65549,       0,     944,1250278158,   0,   0
# vmstat -z | egrep 'ITEM|NetG'
ITEM                   SIZE  LIMIT     USED     FREE      REQ FAIL SLEEP
NetGraph items:          36,  65549,      53,     773,614731785,   0,   0
NetGraph data items:     36,  65549,       0,     944,1250289628,   0,   0
# vmstat -z | egrep 'ITEM|NetG'
ITEM                   SIZE  LIMIT     USED     FREE      REQ FAIL SLEEP
NetGraph items:          36,  65549,      52,     774,614739958,   0,   0
NetGraph data items:     36,  65549,18446744073709551615,     945,1250304143,   0,   0
____________________________________^^^^^^^^^^^^^^^^^^^^__________
# vmstat -z | egrep 'ITEM|NetG'
ITEM                   SIZE  LIMIT     USED     FREE      REQ FAIL SLEEP
NetGraph items:          36,  65549,      57,     769,614747875,   0,   0
NetGraph data items:     36,  65549,       0,     944,1250318622,   0,   0


I do not know how to explain that, but it seems a bug.
>How-To-Repeat:

>Fix:


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