Kernel Configuration

Kernel Configuration

A kernel that supports loadable modules must be configured so that the kernel switch tables generated by lboot contain "extra" entries for the loadable modules. Extra entries are generated by lboot based on the values of the kernel-tunable parameters shown in Table 11-1.

Kernel-tunable Parameters
Name Default Minimum Maximum
bdevsw_extra 21 1 254
cdevsw_extra 23 3 254
fmodsw_extra 20 0 0
vfssw_extra 5 0 0

Kernel-tunable Parameters
Name	Default	Minimum	Maximum
bdevsw_extra	21	1	254
cdevsw_extra	23	3	254
fmodsw_extra	20	0	0
vfssw_extra	5	0	0

These tunable parameters are found in the /var/sysgen/mtune/kernel kernel file and are set to the defaults listed above. It is not necessary to change the defaults unless you want the kernel to allow a greater or lesser number of loadable modules. For more information about changing tunable parameters, see the mtune(4) and systune(1M) manual entries or Chapter 11 of the IRIX Advanced Site and Server Administration Guide.