kern/45598: expanding uvmexp_sysctl makes top etc fail

[yamt%NetBSD.org@localhost]

>Number:         45598
>Category:       kern
>Synopsis:       expanding uvmexp_sysctl makes top etc fail
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Nov 11 10:10:00 +0000 2011
>Originator:     YAMAMOTO Takashi
>Release:        NetBSD current
>Organization:
        
>Environment:
        
        
>Description:
        despite of the comments on the definition of uvmexp_sysctl,
        adding new members to the end of the structure actually breaks the abi.

                % top
                top: sysctl vm.uvmexp2 failed: Cannot allocate memory

        cf.  http://mail-index.netbsd.org/tech-kern/2005/11/09/0002.html

>How-To-Repeat:
        
>Fix:
        

>Unformatted: