topic Kernel changes in Operating System - HP-UX

Kernel changes

Sprint Unix Team — Wed, 10 Oct 2001 18:47:55 GMT

How do i make kernel changes manually on the command line without using sam.

Then which file do i edit to change the kernel parameters.

Points will be assigned

Re: Kernel changes

someone_4 — Wed, 10 Oct 2001 18:57:13 GMT

the 10.20 processworks just fine in the 11.00 environment. The kmtune utility was added to
11.00 just to make things easier.
So, either process listed in the document works for 11.00.

KBRC00001369
Rebuilding the kernel at 10.x /11.0
Rebuilding the kernel at 10.x /11.0

PROBLEM
How do I manually rebuild a kernel at 10.x? 11.0?
RESOLUTION
The simplest way to configure a new kernel under HP-UX 10.x / 11 is with SAM,
the System Administration Manager. However there are situations which arise
that may require a kernel be built manually from the command line. Although the
steps to performs this task are similar for 10.x and 11.0, starting with
version 11.0 new utilities are provided to simplify the process of configuring
kernel parameters and system drivers.

10.X Manual Kernel Configuration
$ cd /stand/build #change to the kernel build directory

$ /usr/lbin/sysadm/system_prep -s system # creates an editable kernel
file
$ vi system #make necessary changes to the kernel file

$ /usr/sbin/mk_kernel -s ./system # creates the test kernel
/stand/build/vmunix_test
$ mv /stand/system /stand/system.prev
$ mv /stand/vmunix /stand/vmunix.prev #preserve prior kernel files

$ mv /stand/build/system /stand/system
$ mv /stand/build/vmunix_test /stand/vmunix # move new kernel files
into place
$ shutdown -ry 0 # reboot the system to test the new kernel

11.0 Manual Kernel Configuration
$ cd /stand/build
$ /usr/lbin/sysadm/system_prep -v -s system

kmtune parm_name=value | kmtune parm_name+value
kmsystem -c y driver_name # these utilities modify the system
file at 11.0
$ /usr/sbin/mk_kernel -s ./system

$ mv /stand/system /stand/system.prev #new for dynamically
linked modules at 11.0
$ mv /stand/build/system /stand/system
$ kmupdate # kmupdate automates moving
the kernel files into the
proper directory

$ shutdown -ry 0

Re: Kernel changes

Deshpande Prashant — Wed, 10 Oct 2001 18:57:18 GMT

Hi

#cd /stand/build
#/usr/lbin/sysadm/system_prep -v -s system
Edit the system file for modifications.
#/usr/sbin/mk_kernel -s ./system

Backup old kernel and system files
#mv /stand/system /stand/system.prev
#mv /stand/vmunix /stand/vmunix.prev

#mv /stand/build/system /stand/system
#kmupdate (kmupdate will move new kernel in right place)

#shutdown -ry 0

Thanks.
Prashant.

Re: Kernel changes

Sridhar Bhaskarla — Wed, 10 Oct 2001 19:09:18 GMT

Sprint Unix Team,

kmupdate is not available on 10.20.

This method is applicable to both 10.20 and 11.00.

1.mk_kernel on 11.0 calls kmupdate.
2.mk_kernel on 10.20 takes care of moving vmunix immediately.

#cp /stand/system /stand/system.prev
#/usr/lbin/sysadm/system_prep -s /stand/system
#mk_kernel -o /stand/vmunix
#shutdown -r now

-Sri