1################################################################################ 2# TACPI DControl ACPI module behaviour 3 4 $acpi_load 5 6 The ACPI driver provides support for the Advanced Configuration and 7 Power Management standard. 8 9 The ACPI kernel module is by default loaded automatically. 10 11 If the acpi_load variable is set, the ACPI module will be loaded. 12 The ACPI driver can be disabled with: 13 14 lunset acpi_load 15 set hint.acpi.0.disabled=1 16 17 Note that the ACPI autodetection sets a number of hints to 18 pass information to the ACPI module. These should not be 19 overridden, or system behaviour will be undefined. 20 21 See acpi.4 man page (on booted system) for full description. 22 23################################################################################ 24# Treboot DReboot the system 25 26 reboot 27 28 Causes the system to immediately reboot. 29 30################################################################################ 31# Tbcachestat DDisplay disk block cache stats 32 33 bcachestat 34 35 Display disk block cache stats. For debugging use only. 36 37################################################################################ 38# Theap DDisplay memory management statistics 39 40 heap 41 42 Requests debugging output from the heap manager. For debugging use 43 only. 44 45################################################################################ 46# Tset Snum_ide_disks DSet the number of IDE disks 47 48 NOTE: this variable is deprecated, use root_disk_unit instead. 49 50 set num_ide_disks=<value> 51 52 When booting from a SCSI disk on a system with one or more IDE disks, 53 and where the IDE disks are the default boot device, it is necessary 54 to tell the kernel how many IDE disks there are in order to have it 55 correctly locate the SCSI disk you are booting from. 56 57################################################################################ 58# Tset Sroot_disk_unit DForce the root disk unit number. 59 60 set root_disk_unit=<value> 61 62 If the code which detects the disk unit number for the root disk is 63 confused, e.g. by a mix of SCSI and IDE disks, or IDE disks with 64 gaps in the sequence (i.e. no primary slave), the unit number can be 65 forced by setting this variable. 66 67 See also vfs.root.mountfrom variable, under `set tunables' help item. 68 69################################################################################ 70