11-27-2006
It is true that sam will validate changes to the kernel and reject illegal input. You don't need to use sam, but then the procedure varies from release to release and we do not know what release is involved here. With recent releases, the command kmtune would be used to adjust a value and kmtune also validates input.
I think malcqv is trying to understand how to recover is the new kernel does not work. That almost never happens anymore since kernel changes are vetted at input time. But you would interrupt the boot sequence and boot the previous kernel which is usually in /stand/vmunix.prev for recent releases.
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Good Day
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LEARN ABOUT HPUX
mk_kernel
mk_kernel(1M) mk_kernel(1M)
NAME
mk_kernel - load a kernel configuration from a system file
SYNOPSIS
path_name] system_file]
DESCRIPTION
reads configuration information from the system file (see system(4)) and applies those changes to a kernel configuration (see kconfig(5)).
performs a function similar to that of but has some semantic differences in order to preserve compatibility with previous releases. will
build a new kernel executable only if needed to effect the requested changes. may reuse existing kernel executables when possible.
Options
recognizes the following options.
Specify the target kernel path.
If the target kernel path specified is changes are applied to the currently running kernel configuration. They will take effect
immediately if possible; otherwise, they will take effect at next boot.
If the target kernel path specified is of the form changes are applied to the saved kernel configuration named config. The
changes will not take effect at next boot unless that saved kernel configuration was already marked for use at next boot.
If the target kernel name is a single word containing no slashes, that name is used as the name of a saved kernel configuration.
The changes are applied to that saved kernel configuration. The changes will not take effect at next boot unless that saved ker-
nel configuration was already marked for use at next boot.
If the target kernel path is not one of the forms specified above, then exits with an error. Other locations for kernel exe-
cutable files are no longer supported.
If the option is not specified, the changes are applied to the kernel configuration called The changes will not take effect at
next boot unless that kernel configuration was already marked for use at next boot.
Specify the HP-UX system description file.
If this option is not specified, the system file is used. For details see system(4).
Verbose mode. (Has no effect; retained for backward compatibility.)
RETURN VALUE
returns 0 upon normal completion; it returns 1 if an error occurred.
DIAGNOSTICS
Messages and warnings are sent to Messages from and other commands are displayed when invoked from Errors cause to halt immediately; warn-
ings allow the program to continue.
EXAMPLES
Uses the default HP-UX system description file
The changes are applied to the currently running kernel configuration, marked to take effect at next boot.
Uses the system description file
Uses the system description file
The changes are applied to the saved kernel configuration called
WARNINGS
Do not manually modify the contents of the kernel configuration directories.
FILES
Default HP-UX system description file
SEE ALSO
kconfig(1M), system(4), kconfig(5).
mk_kernel(1M)