Re: install/41117: ddb.onpanic=0 in default sysctl.conf(5) could cause error

[christos%zoulas.com@localhost (Christos Zoulas)]

On Apr 1, 11:45am, tsutsui%ceres.dti.ne.jp@localhost 
(tsutsui%ceres.dti.ne.jp@localhost) wrote:
-- Subject: install/41117: ddb.onpanic=0 in default sysctl.conf(5) could caus

| >Number:         41117
| >Category:       install
| >Synopsis:       ddb.onpanic=0 in default sysctl.conf(5) could cause error
| >Confidential:   no
| >Severity:       non-critical
| >Priority:       high
| >Responsible:    install-manager
| >State:          open
| >Class:          sw-bug
| >Submitter-Id:   net
| >Arrival-Date:   Wed Apr 01 11:45:00 +0000 2009
| >Originator:     Izumi Tsutsui
| >Release:        NetBSD 5.0_RC3
| >Organization:
| >Environment:
| System: NetBSD/sparc default install, but affects all ports
| Architecture: sparc
| Machine: sparc
| >Description:
| The default sysctl.conf(5) file now has an entry of "ddb.onpanic=0"
| to avoid ddb prompt on running system, but that ddb.onpanic sysctl
| node is only available on kernels with options DDB.
| 
| On sparc the default GENERIC kernel doesn't have options DDB,
| so the above ddb.onpanic entry in sysctl.conf causes
| the following error message
| >> sysctl: second level name 'onpanic' in 'ddb.onpanic' is invalid
| on every reboot.
| 
| >How-To-Repeat:
| Install NetBSD/sparc 5.0_RC3 and boot it to multiuser.
| 
| >Fix:
| There are several suggestions in source-changes-d thread:
| 
| - add an option to sysctl(8) to ignore error
|   http://mail-index.NetBSD.org/source-changes-d/2009/03/29/msg000144.html
| 
| - introduce a new syntax for sysctl(8) to see if the specified node is vaild
|   http://mail-index.netbsd.org/source-changes-d/2009/03/29/msg000148.html
| 
| But for 5.0 release, we might need simpler workaround.
| (adding a dummy ddb.onpanic stub for !DDB case in some source?)
| 

It is simpler and adds consistency to add ddb to the sparc kernel.

christos