Managing Kernel Modules with HP SMH

HP SMH can be used to query and change the states of kernel modules in the currently running configuration. Using HP SMH, you can

Determine which modules are currently running in the kernel
View details about a module
Modify the state of a module

You can view the modules pane by selecting the Modules tab on the HP SMH Kernel Configuration page, as shown in Figure 10-2.

Figure 10-2 Kernel Configuration Modules Tab

Getting Information about Modules

To get more detailed information about a particular module, do the following:

Scroll to the module in the list.
Click the radio button.

The module details are displayed below the list, as shown in Figure 10-3.

Figure 10-3 Kernel Configuration Module Details

Interpreting Module Information

The module details block and the module list contain the information shown in Table 10-2.

Table 10-2 Kernel Module Details Fields

Field Name	Description
Module	The name of the module
Description	A brief description of the module
Timestamp	The version of the module
Current State	The state of the module in the kernel that is currently running (`unused`, `static`, `loaded`, `auto`)
Current Cause	The reason why the module is in its current state (`explicit`, `auto`, `depend`, `required`, `default`)
Next Boot State	The state of the module after the system is restarted.
Next Boot Cause	The reason why the module is in its next boot state.
Capabilities	All the states that the module is capable of supporting.
Dynamic	Is it a dynamically loadable kernel module?
Required	Does the kernel requires the module?
Dependencies	All the modules required by this module.
Exports	All the interfaces exported by this module.
Modifiable	Can the module be modified?

Changing Module States

To change the state of a module, do the following:

Select the module.

Click Modify Module in the right-hand column of the window.




	NOTE: If the cause is dependent or required, Modify Module will not appear, as HP SMH does not allow modifications to the state of a required module or a module on which other modules are dependent.

The Modify Kernel Module window is displayed, as shown in Figure 10-4.

Figure 10-4 Modify Kernel Module

The Modify Kernel Module display fields are described in Table 10-3.

Table 10-3 Modify Kernel Module Fields

Field Name	Description
Module Name	Name of the module to be modified
Description	Description of the module
Version	Version number of the module
Current State	Current value of the module
Current Cause	How the module got into its current state
Capabilities	All the states that the module can support
Dynamic	Whether the module is a dynamically loadable kernel module
Dependencies	All the modules on which this module depends

This window also displays the areas that you can change, as shown in Table 10-4. The areas displayed depend on the capabilities of the module. Enter your changes.

Table 10-4 Modify Kernel Module Change Options

Field Name	Description
Next Boot State	Choose the new state for the module. Select one of `auto`, `static`, `loaded`, or `unused`. The default is `auto`.
Mode of Change	Select either change immediately or change at next boot The default is change at next boot.
Backup	Check whether to back up the current configuration before applying the change. By default, this check box is selected.
Reason for Change	Enter comments about the change in the module state

(Optional) To see the command that will execute the changes, click the Preview button.
After you have entered your changes, click the Modify button to execute them. Or click the Cancel button to discard your changes.

Managing Kernel Modules with HP SMH

Technical documentation

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Getting Information about Modules

Interpreting Module Information

Changing Module States