1*479ab7f0SSascha Wildner################################################################################ 2*479ab7f0SSascha Wildner# TACPI DControl ACPI module behaviour 3*479ab7f0SSascha Wildner 4*479ab7f0SSascha Wildner $acpi_load 5*479ab7f0SSascha Wildner 6*479ab7f0SSascha Wildner The ACPI driver provides support for the Advanced Configuration and 7*479ab7f0SSascha Wildner Power Management standard. 8*479ab7f0SSascha Wildner 9*479ab7f0SSascha Wildner The ACPI kernel module is by default loaded automatically. 10*479ab7f0SSascha Wildner 11*479ab7f0SSascha Wildner If the acpi_load variable is set, the ACPI module will be loaded. 12*479ab7f0SSascha Wildner The ACPI driver can be disabled with: 13*479ab7f0SSascha Wildner 14*479ab7f0SSascha Wildner lunset acpi_load 15*479ab7f0SSascha Wildner set hint.acpi.0.disabled=1 16*479ab7f0SSascha Wildner 17*479ab7f0SSascha Wildner Note that the ACPI autodetection sets a number of hints to 18*479ab7f0SSascha Wildner pass information to the ACPI module. These should not be 19*479ab7f0SSascha Wildner overridden, or system behaviour will be undefined. 20*479ab7f0SSascha Wildner 21*479ab7f0SSascha Wildner See acpi.4 man page (on booted system) for full description. 22*479ab7f0SSascha Wildner 23*479ab7f0SSascha Wildner################################################################################ 24*479ab7f0SSascha Wildner# Treboot DReboot the system 25*479ab7f0SSascha Wildner 26*479ab7f0SSascha Wildner reboot 27*479ab7f0SSascha Wildner 28*479ab7f0SSascha Wildner Causes the system to immediately reboot. 29*479ab7f0SSascha Wildner 30*479ab7f0SSascha Wildner################################################################################ 31*479ab7f0SSascha Wildner# Tbcachestat DDisplay disk block cache stats 32*479ab7f0SSascha Wildner 33*479ab7f0SSascha Wildner bcachestat 34*479ab7f0SSascha Wildner 35*479ab7f0SSascha Wildner Display disk block cache stats. For debugging use only. 36*479ab7f0SSascha Wildner 37*479ab7f0SSascha Wildner################################################################################ 38*479ab7f0SSascha Wildner# Theap DDisplay memory management statistics 39*479ab7f0SSascha Wildner 40*479ab7f0SSascha Wildner heap 41*479ab7f0SSascha Wildner 42*479ab7f0SSascha Wildner Requests debugging output from the heap manager. For debugging use 43*479ab7f0SSascha Wildner only. 44*479ab7f0SSascha Wildner 45*479ab7f0SSascha Wildner################################################################################ 46*479ab7f0SSascha Wildner# Tset Snum_ide_disks DSet the number of IDE disks 47*479ab7f0SSascha Wildner 48*479ab7f0SSascha Wildner NOTE: this variable is deprecated, use root_disk_unit instead. 49*479ab7f0SSascha Wildner 50*479ab7f0SSascha Wildner set num_ide_disks=<value> 51*479ab7f0SSascha Wildner 52*479ab7f0SSascha Wildner When booting from a SCSI disk on a system with one or more IDE disks, 53*479ab7f0SSascha Wildner and where the IDE disks are the default boot device, it is necessary 54*479ab7f0SSascha Wildner to tell the kernel how many IDE disks there are in order to have it 55*479ab7f0SSascha Wildner correctly locate the SCSI disk you are booting from. 56*479ab7f0SSascha Wildner 57*479ab7f0SSascha Wildner################################################################################ 58*479ab7f0SSascha Wildner# Tset Sroot_disk_unit DForce the root disk unit number. 59*479ab7f0SSascha Wildner 60*479ab7f0SSascha Wildner set root_disk_unit=<value> 61*479ab7f0SSascha Wildner 62*479ab7f0SSascha Wildner If the code which detects the disk unit number for the root disk is 63*479ab7f0SSascha Wildner confused, e.g. by a mix of SCSI and IDE disks, or IDE disks with 64*479ab7f0SSascha Wildner gaps in the sequence (i.e. no primary slave), the unit number can be 65*479ab7f0SSascha Wildner forced by setting this variable. 66*479ab7f0SSascha Wildner 67*479ab7f0SSascha Wildner See also vfs.root.mountfrom variable, under `set tunables' help item. 68*479ab7f0SSascha Wildner 69*479ab7f0SSascha Wildner################################################################################ 70