kcweb또는 kctune 으로 새로운 커널파라미터를 적용하려고 하면 에러가 발생



krs_sysinit: can't get filename error unable to retrieve module information from configuration "current: kc_kr_open_node(/kconfig/mduls): krs error code 2

unable to load moduls scheduled to be loaded at boot time kc_mod_get_failed
unable to read title of configuration "current krs error code 2

warning. unable ro read the currently booted kernel configuration in order to generate an updated system file the system file may be out of sync with the kernel configuration. the kernel specified krs file krs/config.krs in your kernel configuration directory was not found. the system will boot up to single user mode.

cannot create /stand/current/krs
too many level of symbolic links

config.krs is linked to itself

복구를 위해서 백업커널구성으로 시스템을 reboot합니다.

HPUX> boot backup

시스템에 backup KC에서 부팅되어 올라옴

# ll /stand/current
total 93168
-rw-r--r-- 1 root root 0 Mar 24 17:03 .config
-rw-r--r-- 1 root root 147 Mar 24 17:03 README
drwxr-xr-x 3 root root 96 Mar 24 17:03 bootfs
lrwxr-xr-x 1 root root 19 Mar 25 07:09 krs -
> /stand/nextboot/krs
drwxr-xr-x 2 root root 96 Mar 25 07:09 krs.pre-split
drwxr-xr-x 2 root root 8192 Mar 25 07:16 mod
-rw-r--r-- 1 root root 3159 Mar 25 07:16 system
-rwxr-xr-x 4 root sys 47672688 Feb 9 10:33 vmunix

krc가 /stand/nextboot/krs에 symbolic link되어 있음

#kconfig -v
Configuration backup
Title Automatic Backup
Save Time Wed Mar 17 16:08:12 2004
Modify Time Wed Mar 17 16:08:12 2004
Kernel Path /stand/backup/vmunix

Configuration last_install
Title Created by last OS install
Save Time Tue Feb 3 18:16:27 2004
Modify Time Tue Feb 3 18:16:27 2004
Kernel Path /stand/last_install/vmunix

/stand/system 에서 KC를 import합니다.

#kconfig -i /stand/system
WARNING: The currently running configuration has changes that are being
held for next boot.
==> Do you wish to continue? yes
retval = -1 errno = 16 Device busy
ERROR: Deletion of "/stand/nextboot" returned error [16] [Device busy]
ERROR: Unable to mark the configuration 'current' to be used at next
boot: symlink: File exists
ERROR: Unable to discard pending changes before trying to import to currently running configuration.

--> /stand/nextboot을 지우는 과정에서 에러발생함

symbolic links를 지우고 나서 /stand/nextboot을 지울 수 있음

# rm -r /stand/nextboot

하지만 kconfig -i는 invalid system file때문에 실패함
/stand/system이 지워진 /stand/nextboot/system 에 link되어 있었기때문입니다.

# cp /stand/current/system /stand/system

#kconfig -i /stand/system
WARNING: The currently running configuration has changes that are being held for next boot.
==> Do you wish to continue? yes
WARNING: The automatic 'backup' configuration currently contains the configuration that was in use before the last reboot of this system.
==> Do you wish to update it to contain the current configuration
before making the requested change? yes
* The automatic 'backup' configuration has been updated.
* /stand/system has been imported. The changes have been applied to the currently running system.

tunable setting 이 적용가능해졌습니다.