Managing and Developing Dynamically Loadable Kernel Modules

Managing Dynamically Loadable Kernel Modules

Chapter 12 507

Why you should use the kernel conﬁguration tools instead of

manually editing or copying files

Since the introduction of DLKM to HP-UX, the installed kernel

conﬁguration information is used to conﬁgure a whole kernel, or a

speciﬁc module, and is distributed among several ﬁles. The number and

location of the ﬁles used to conﬁgure a kernel depends on which modules

kmtune (1M) Provides an interface to set the tunable parameters

• -l option – prints the values of all system

parameters.

• -q option – queries the value of the speciﬁed

system parameter.

• -r option – resets the value of the speciﬁed

parameter to its default value in preparation for

the next kernel or module conﬁguration.

• -s option – assigns a value to the speciﬁed

system parameter in preparation for the next

kernel or module conﬁguration.

kmupdate (1M) Updates the system with the newly built kernel

and/or associated DLKM ﬁles.

• First form – prepares the system to move the

speciﬁed newly built kernel and its associated

ﬁles to the correct locations during the next

system shutdown and startup. This step is

necessary to be able to boot from a newly built

kernel (see config(1M) for more detail).

• Second form, -M option – moves the conﬁgured

image of the speciﬁed loadable module to the

location where the DLKM loader can ﬁnd it, and

registers the module with the kernel either (1)

immediately or (2) later at the next system

reboot.

Table 12-2 Kernel Conﬁguration Tool Set

Tool/

Command

Action