X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=Documentation%2Fkernel-parameters.txt;h=e7ea0b7a6496b047462fadf4d3f23585797b918b;hb=c7b5ebbddf7bcd3651947760f423e3783bbe6573;hp=13839bd74ce070d08f71eccdb9d4f628bf726e12;hpb=a2c21200f1c81b08cb55e417b68150bba439b646;p=linux-2.6.git diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 13839bd74..e7ea0b7a6 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -97,9 +97,6 @@ running once the system is up. See header of drivers/scsi/53c7xx.c. See also Documentation/scsi/ncr53c7xx.txt. - 98busmouse.irq= [HW,MOUSE] PC-9801 Bus Mouse Driver - Format: , default is 13 - acpi= [HW,ACPI] Advanced Configuration and Power Interface Format: { force | off | ht | strict } force -- enable ACPI if default was off @@ -138,6 +135,20 @@ running once the system is up. Recognize and ignore IRQ0/pin2 Interrupt Override. For broken nForce2 BIOS resulting in XT-PIC timer. + acpi_dbg_layer= [HW,ACPI] + Format: + Each bit of the indicates an acpi debug layer, + 1: enable, 0: disable. It is useful for boot time + debugging. After system has booted up, it can be set + via /proc/acpi/debug_layer. + + acpi_dbg_level= [HW,ACPI] + Format: + Each bit of the indicates an acpi debug level, + 1: enable, 0: disable. It is useful for boot time + debugging. After system has booted up, it can be set + via /proc/acpi/debug_level. + ad1816= [HW,OSS] Format: ,,, See also Documentation/sound/oss/AD1816. @@ -189,6 +200,11 @@ running once the system is up. Disable APC CPU standby support. SPARCstation-Fox does not play well with APC CPU idle - disable it if you have APC and your system crashes randomly. + + apic= [APIC,i386] Change the output verbosity whilst booting + Format: { quiet (default) | verbose | debug } + Change the amount of debugging information output + when initialising the APIC and IO-APIC components. apm= [APM] Advanced Power Management See header of arch/i386/kernel/apm.c. @@ -448,6 +464,11 @@ running once the system is up. hd?= [HW] (E)IDE subsystem hd?lun= See Documentation/ide.txt. + highmem=nn[KMG] [KNL,BOOT] forces the highmem zone to have an exact + size of . This works even on boxes that have no + highmem otherwise. This also works to reduce highmem + size on bigger boxes. + hisax= [HW,ISDN] See Documentation/isdn/README.HiSax. @@ -523,6 +544,18 @@ running once the system is up. isapnp= [ISAPNP] Format: , , , + isolcpus= [KNL,SMP] Isolate CPUs from the general scheduler. + Format: , ..., + This option can be used to specify one or more CPUs + to isolate from the general SMP balancing and scheduling + algorithms. The only way to move a process onto or off + an "isolated" CPU is via the CPU affinity syscalls. + + This option is the preferred way to isolate CPUs. The + alternative - manually setting the CPU mask of all tasks + in the system can cause problems and suboptimal load + balancer performance. + isp16= [HW,CD] Format: ,,, @@ -574,6 +607,20 @@ running once the system is up. so, the driver will manage that printer. See also header of drivers/char/lp.c. + lpj=n [KNL] + Sets loops_per_jiffy to given constant, thus avoiding + time-consuming boot-time autodetection (up to 250 ms per + CPU). 0 enables autodetection (default). To determine + the correct value for your kernel, boot with normal + autodetection and see what value is printed. Note that + on SMP systems the preset will be applied to all CPUs, + which is likely to cause problems if your CPUs need + significantly divergent settings. An incorrect value + will cause delays in the kernel to be wrong, leading to + unpredictable I/O errors and other breakage. Although + unlikely, in the extreme case this might damage your + hardware. + ltpc= [NET] Format: ,, @@ -650,6 +697,12 @@ running once the system is up. mga= [HW,DRM] + mousedev.tap_time= + [MOUSE] Maximum time between finger touching and + leaving touchpad surface for touch to be considered + a tap and be reported as a left button click (for + touchpads working in absolute mode only). + Format: mousedev.xres= [MOUSE] Horizontal screen resolution, used for devices reporting absolute coordinates, such as tablets mousedev.yres= [MOUSE] Vertical screen resolution, used for devices @@ -707,6 +760,9 @@ running once the system is up. noasync [HW,M68K] Disables async and sync negotiation for all devices. + nobats [PPC] Do not use BATs for mapping kernel lowmem + on "Classic" PPC cores. + nocache [ARM] nodisconnect [HW,SCSI,M68K] Disables SCSI disconnects. @@ -739,8 +795,13 @@ running once the system is up. nolapic [IA-32,APIC] Do not enable or use the local APIC. + noltlbs [PPC] Do not use large page/tlb entries for kernel + lowmem mapping on PPC40x. + nomce [IA-32] Machine Check Exception + noresidual [PPC] Don't use residual data on PReP machines. + noresume [SWSUSP] Disables resume and restore original swap space. no-scroll [VGA] Disables scrollback. @@ -852,6 +913,13 @@ running once the system is up. noacpi [IA-32] Do not use ACPI for IRQ routing or for PCI scanning. + firmware [ARM] Do not re-enumerate the bus but + instead just use the configuration + from the bootloader. This is currently + used on IXP2000 systems where the + bus has to be configured a certain way + for adjunct CPUs. + pcmv= [HW,PCMCIA] BadgePAD 4 pd. [PARIDE] @@ -887,7 +955,10 @@ running once the system is up. Ranges are in pairs (memory base and size). profile= [KNL] Enable kernel profiling via /proc/profile - (param: profile step/bucket size as a power of 2) + { schedule | } + (param: schedule - profile schedule points} + (param: profile step/bucket size as a power of 2 for + statistical time based profiling) prompt_ramdisk= [RAM] List of RAM disks to prompt for floppy disk before loading. @@ -1250,6 +1321,12 @@ running once the system is up. This is actually a boot loader parameter; the value is passed to the kernel using a special protocol. + vmalloc=nn[KMG] [KNL,BOOT] forces the vmalloc area to have an exact + size of . This can be used to increase the + minimum size (128MB on x86). It can also be used to + decrease the size and leave more room for directly + mapped kernel RAM. + vmhalt= [KNL,S390] vmpoff= [KNL,S390]