Managing and Developing Dynamically Loadable Kernel Modules

Managing Dynamically Loadable Kernel Modules

Chapter 12 519

Preparing a Loadable Module for Static Linking

You can use the kmsystem command to prepare a DLKM module for

conﬁguration as statically conﬁgured.

Use the kmsystem command to set the planned conﬁguration of a

module.

To prepare a DLKM module for static linking to the HP-UX kernel,

execute this kmsystem command:

/usr/sbin/kmsystem -c y -l n

module_name

NOTE A module’s system description ﬁle, as well as the HP-UX system ﬁle,

must only be modiﬁed using the kmsystem or kmtune commands. It is

important to follow this practice because the format of planned

attributes and their location in the system will change in future releases

and if you manually modify the system ﬁles as they are currently

designed, your modiﬁcations will not be forward compatible.

Querying and Tuning System Parameters for a Statically Conﬁgured

Module Present in the Static Kernel

Use the kmtune command to query, set, or reset system (tunable)

parameters used by the DLKM module or the static kernel. kmtune reads

the master conﬁguration ﬁles, the system description ﬁles, and the HP-

UX system ﬁle.

For a traditionally packaged module (one that uses pre-11.0 module

packaging), kmtune writes any user modiﬁed system parameter to the

HP-UX system ﬁle.

To query the value of a speciﬁc system parameter:

Step 1. Execute this kmtune command:

/usr/sbin/kmtune -q

system_parameter_name

Step 2. To set the value of a speciﬁc system parameter, execute this kmtune

command:

/usr/sbin/kmtune -s

system_parameter_name=value

Step 3. To reset the value of a system parameter to its default value, execute this

kmtune command: