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Tunable parameters

Dynamically loadable kernel module (DLKM) parameters

Parameter Dflt Min Max
BDEV_RESERVE 20 0 255
CDEV_RESERVE 55 0 255
DEF_UNLOAD_DELAY 60 0 3600
FMOD_RESERVE 50 0 255
PAGESYMTAB 1 0 2
UNLOAD_WAKE 60 60 3600
VFS_RESERVE 10 0 255


BDEV_RESERVE
Specifies the number of empty slots reserved in the ``bdevsw'' (block device switch) table that can be used by loadable, pre-DDI8, block device drivers. This parameter supports the loadable module feature.

CDEV_RESERVE
Specifies the number of empty slots reserved in the ``cdevsw'' (character device switch) table that can be used by loadable, pre-DDI8, character device drivers. This parameter supports the loadable module feature.

DEF_UNLOAD_DELAY
Specifies the global default auto-unload delay time. Loadable modules will not be auto-unloaded unless the module is idle for at least the number of seconds specified by this parameter. Each ``old style'' loadable module can override the global default for auto-unload delay by specifying its own auto-unload delay in the Mtune file for the module (but this is not true for ``new style'' modules such as DDI8 device drivers). The name of the module's unload delay tunable parameter, PREFIX_UNLOAD_DELAY, must begin with the ``prefix'' field from Master(4dsp) converted to upper case letters.

FMOD_RESERVE
Specifies the number of empty slots reserved in the fmodsw, STREAMS modules switch, table that can be used by a loadable STREAMS driver. This parameter supports the loadable module feature.

PAGESYMTAB
This parameter can be set to ``0'' to indicate no paging, to ``2'' to indicate forced paging, or to ``1'' (default) to indicate that paging of the dynamic symbol table can occur if the table is not locked.

UNLOAD_WAKE
Specifies the auto-unloading daemon wakeup interval in seconds.

VFS_RESERVE
Specifies the number of empty slots reserved in the ``vfssw'' (filesystems switch) table that can be used by a loadable filesystem driver. This parameter supports the loadable module feature.

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UnixWare 7 Release 7.1.4 - 22 April 2004