kern/49036: "sysctl_createv: sysctl_locate(multicast) returned 2" on boot

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

>Number:         49036
>Category:       kern
>Synopsis:       "sysctl_createv: sysctl_locate(multicast) returned 2" on boot
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jul 26 18:00:00 +0000 2014
>Originator:     Izumi Tsutsui
>Release:        NetBSD 6.99.49
>Organization:
>Environment:
System: NetBSD/luna68k 6.99.49 GENERIC
Architecture: m68k
Machine: luna68k, but reported on more ports
>Description:
On several ports kernels print the following sysctl_createv errors
during boot:
---
total memory = 69632 KB
avail memory = 64744 KB
sysctl_createv: sysctl_locate(multicast) returned 2
sysctl_createv: sysctl_locate(multicast_kludge) returned 2
mainbus0 (root)
---

Reported on atari, luna68k, x68k, mac68k, evbarm, and sparc64:
http://mail-index.netbsd.org/port-m68k/2014/07/26/msg000502.html
http://mail-index.netbsd.org/port-m68k/2014/07/26/msg000503.html
http://mail-index.netbsd.org/port-m68k/2014/07/26/msg000504.html
http://mail-index.netbsd.org/port-m68k/2014/07/26/msg000505.html
Also seen on sun3 on TME.

>How-To-Repeat:
Boot GENERIC like kernels and check dmesg?

>Fix:
Check the following commit which introduced these new sysctl nodes?
http://www.nerv.org/netbsd/?q=id:20140610T093830Z.0af2fd79a81cf1f469ee1bc7b95d97b6e4507b58