2007-09-15 10:38:47 +00:00
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Kernel Parameters
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~~~~~~~~~~~~~~~~~
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2005-04-16 22:20:36 +00:00
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The following is a consolidated list of the kernel parameters as implemented
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(mostly) by the __setup() macro and sorted into English Dictionary order
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(defined as ignoring all punctuation and sorting digits before letters in a
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case insensitive manner), and with descriptions where known.
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Module parameters for loadable modules are specified only as the
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parameter name with optional '=' and value as appropriate, such as:
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modprobe usbcore blinkenlights=1
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Module parameters for modules that are built into the kernel image
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are specified on the kernel command line with the module name plus
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'.' plus parameter name, with '=' and value if appropriate, such as:
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usbcore.blinkenlights=1
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2006-03-31 23:43:18 +00:00
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This document may not be entirely up to date and comprehensive. The command
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"modinfo -p ${modulename}" shows a current list of all parameters of a loadable
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module. Loadable modules, after being loaded into the running kernel, also
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reveal their parameters in /sys/module/${modulename}/parameters/. Some of these
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parameters may be changed at runtime by the command
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"echo -n ${value} > /sys/module/${modulename}/parameters/${parm}".
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2006-03-31 23:44:30 +00:00
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The parameters listed below are only valid if certain kernel build options were
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enabled and if respective hardware is present. The text in square brackets at
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the beginning of each description states the restrictions within which a
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parameter is applicable:
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2005-04-16 22:20:36 +00:00
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ACPI ACPI support is enabled.
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2007-07-27 00:46:20 +00:00
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AGP AGP (Accelerated Graphics Port) is enabled.
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2005-04-16 22:20:36 +00:00
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ALSA ALSA sound support is enabled.
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APIC APIC support is enabled.
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APM Advanced Power Management support is enabled.
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2007-10-10 12:58:29 +00:00
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AVR32 AVR32 architecture is enabled.
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2005-04-16 22:20:36 +00:00
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AX25 Appropriate AX.25 support is enabled.
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2007-10-09 09:24:49 +00:00
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BLACKFIN Blackfin architecture is enabled.
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2005-10-23 19:57:11 +00:00
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DRM Direct Rendering Management support is enabled.
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2005-04-16 22:20:36 +00:00
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EDD BIOS Enhanced Disk Drive Services (EDD) is enabled
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EFI EFI Partitioning (GPT) is enabled
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EIDE EIDE/ATAPI support is enabled.
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FB The frame buffer device is enabled.
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HW Appropriate hardware is enabled.
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IA-64 IA-64 architecture is enabled.
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IOSCHED More than one I/O scheduler is enabled.
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2005-07-12 20:58:33 +00:00
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IP_PNP IP DHCP, BOOTP, or RARP is enabled.
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2005-04-16 22:20:36 +00:00
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ISAPNP ISA PnP code is enabled.
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ISDN Appropriate ISDN support is enabled.
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JOY Appropriate joystick support is enabled.
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2006-09-28 18:29:01 +00:00
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LIBATA Libata driver is enabled
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2005-04-16 22:20:36 +00:00
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LP Printer support is enabled.
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LOOP Loopback device support is enabled.
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M68k M68k architecture is enabled.
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These options have more detailed description inside of
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Documentation/m68k/kernel-options.txt.
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MCA MCA bus support is enabled.
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MDA MDA console support is enabled.
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MOUSE Appropriate mouse support is enabled.
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2006-03-06 05:33:34 +00:00
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MSI Message Signaled Interrupts (PCI).
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2007-07-31 07:37:40 +00:00
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MTD MTD (Memory Technology Device) support is enabled.
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2005-04-16 22:20:36 +00:00
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NET Appropriate network support is enabled.
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NUMA NUMA support is enabled.
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2006-06-26 07:25:05 +00:00
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GENERIC_TIME The generic timeofday code is enabled.
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2005-04-16 22:20:36 +00:00
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NFS Appropriate NFS support is enabled.
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OSS OSS sound support is enabled.
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2007-07-31 07:37:40 +00:00
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PV_OPS A paravirtualized kernel is enabled.
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PARIDE The ParIDE (parallel port IDE) subsystem is enabled.
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2005-04-16 22:20:36 +00:00
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PARISC The PA-RISC architecture is enabled.
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PCI PCI bus support is enabled.
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2007-10-05 20:17:58 +00:00
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PCIE PCI Express support is enabled.
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2005-04-16 22:20:36 +00:00
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PCMCIA The PCMCIA subsystem is enabled.
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PNP Plug & Play support is enabled.
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PPC PowerPC architecture is enabled.
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PPT Parallel port support is enabled.
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PS2 Appropriate PS/2 support is enabled.
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RAM RAM disk support is enabled.
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2007-10-17 06:31:32 +00:00
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ROOTPLUG The example Root Plug LSM is enabled.
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2005-04-16 22:20:36 +00:00
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S390 S390 architecture is enabled.
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SCSI Appropriate SCSI support is enabled.
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A lot of drivers has their options described inside of
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Documentation/scsi/.
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2007-10-17 06:31:32 +00:00
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SECURITY Different security models are enabled.
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2005-04-16 22:20:36 +00:00
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SELINUX SELinux support is enabled.
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SERIAL Serial support is enabled.
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2007-02-28 09:30:01 +00:00
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SH SuperH architecture is enabled.
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2005-04-16 22:20:36 +00:00
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SMP The kernel is an SMP kernel.
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SPARC Sparc architecture is enabled.
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2005-10-23 19:57:11 +00:00
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SWSUSP Software suspend is enabled.
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2005-04-16 22:20:36 +00:00
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TS Appropriate touchscreen support is enabled.
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USB USB support is enabled.
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USBHID USB Human Interface Device support is enabled.
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V4L Video For Linux support is enabled.
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VGA The VGA console has been enabled.
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VT Virtual terminal support is enabled.
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WDT Watchdog support is enabled.
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XT IBM PC/XT MFM hard disk support is enabled.
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2007-07-31 07:37:59 +00:00
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X86-32 X86-32, aka i386 architecture is enabled.
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2005-04-16 22:20:36 +00:00
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X86-64 X86-64 architecture is enabled.
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More X86-64 boot options can be found in
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Documentation/x86_64/boot-options.txt .
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In addition, the following text indicates that the option:
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BUGS= Relates to possible processor bugs on the said processor.
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KNL Is a kernel start-up parameter.
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BOOT Is a boot loader parameter.
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Parameters denoted with BOOT are actually interpreted by the boot
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loader, and have no meaning to the kernel directly.
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Do not modify the syntax of boot loader parameters without extreme
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need or coordination with <Documentation/i386/boot.txt>.
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2007-02-13 12:26:21 +00:00
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There are also arch-specific kernel-parameters not documented here.
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See for example <Documentation/x86_64/boot-options.txt>.
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2005-04-16 22:20:36 +00:00
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Note that ALL kernel parameters listed below are CASE SENSITIVE, and that
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a trailing = on the name of any parameter states that that parameter will
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be entered as an environment variable, whereas its absence indicates that
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it will appear as a kernel argument readable via /proc/cmdline by programs
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running once the system is up.
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2006-09-29 09:00:27 +00:00
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The number of kernel parameters is not limited, but the length of the
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complete command line (parameters including spaces etc.) is limited to
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a fixed number of characters. This limit depends on the architecture
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and is between 256 and 4096 characters. It is defined in the file
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./include/asm/setup.h as COMMAND_LINE_SIZE.
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2007-03-06 10:29:44 +00:00
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acpi= [HW,ACPI,X86-64,i386]
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Advanced Configuration and Power Interface
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2005-10-23 19:57:11 +00:00
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Format: { force | off | ht | strict | noirq }
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2005-04-16 22:20:36 +00:00
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force -- enable ACPI if default was off
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off -- disable ACPI if default was on
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noirq -- do not use ACPI for IRQ routing
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ht -- run only enough ACPI to enable Hyper Threading
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2005-10-23 19:57:11 +00:00
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strict -- Be less tolerant of platforms that are not
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2005-04-16 22:20:36 +00:00
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strictly ACPI specification compliant.
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See also Documentation/pm.txt, pci=noacpi
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2007-03-11 07:26:14 +00:00
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acpi_apic_instance= [ACPI, IOAPIC]
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Format: <int>
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2: use 2nd APIC table, if available
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1,0: use 1st APIC table
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2007-03-30 18:16:10 +00:00
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default: 0
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2007-03-11 07:26:14 +00:00
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2005-04-16 22:20:36 +00:00
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acpi_sleep= [HW,ACPI] Sleep options
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Format: { s3_bios, s3_mode }
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See Documentation/power/video.txt
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2005-10-23 19:57:11 +00:00
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2005-04-16 22:20:36 +00:00
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acpi_sci= [HW,ACPI] ACPI System Control Interrupt trigger mode
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2005-10-23 19:57:11 +00:00
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Format: { level | edge | high | low }
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2005-04-16 22:20:36 +00:00
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2005-10-23 19:57:11 +00:00
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acpi_irq_balance [HW,ACPI]
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ACPI will balance active IRQs
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default in APIC mode
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2005-04-16 22:20:36 +00:00
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2005-10-23 19:57:11 +00:00
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acpi_irq_nobalance [HW,ACPI]
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ACPI will not move active IRQs (default)
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default in PIC mode
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2005-04-16 22:20:36 +00:00
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2005-10-23 19:57:11 +00:00
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acpi_irq_pci= [HW,ACPI] If irq_balance, clear listed IRQs for
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use by PCI
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2005-04-16 22:20:36 +00:00
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Format: <irq>,<irq>...
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2005-10-23 19:57:11 +00:00
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acpi_irq_isa= [HW,ACPI] If irq_balance, mark listed IRQs used by ISA
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2005-04-16 22:20:36 +00:00
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Format: <irq>,<irq>...
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2007-07-26 04:50:06 +00:00
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acpi_no_auto_ssdt [HW,ACPI] Disable automatic loading of SSDT
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2006-01-26 04:47:36 +00:00
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acpi_os_name= [HW,ACPI] Tell ACPI BIOS the name of the OS
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Format: To spoof as Windows 98: ="Microsoft Windows"
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2007-05-29 22:43:33 +00:00
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acpi_osi= [HW,ACPI] Modify list of supported OS interface strings
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acpi_osi="string1" # add string1 -- only one string
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acpi_osi="!string2" # remove built-in string2
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acpi_osi= # disable all strings
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2005-04-16 22:20:36 +00:00
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acpi_serialize [HW,ACPI] force serialization of AML methods
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acpi_skip_timer_override [HW,ACPI]
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Recognize and ignore IRQ0/pin2 Interrupt Override.
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For broken nForce2 BIOS resulting in XT-PIC timer.
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2006-11-14 15:57:46 +00:00
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acpi_use_timer_override [HW,ACPI}
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Use timer override. For some broken Nvidia NF5 boards
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that require a timer override, but don't have
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HPET
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2005-04-16 22:20:36 +00:00
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2007-04-24 05:53:22 +00:00
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acpi.debug_layer= [HW,ACPI]
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2005-04-16 22:20:36 +00:00
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Format: <int>
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2005-10-23 19:57:11 +00:00
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Each bit of the <int> indicates an ACPI debug layer,
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2005-04-16 22:20:36 +00:00
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1: enable, 0: disable. It is useful for boot time
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debugging. After system has booted up, it can be set
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2007-04-24 05:53:22 +00:00
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via /sys/module/acpi/parameters/debug_layer.
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CONFIG_ACPI_DEBUG must be enabled for this to produce any output.
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Available bits (add the numbers together) to enable debug output
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for specific parts of the ACPI subsystem:
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0x01 utilities 0x02 hardware 0x04 events 0x08 tables
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0x10 namespace 0x20 parser 0x40 dispatcher
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0x80 executer 0x100 resources 0x200 acpica debugger
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0x400 os services 0x800 acpica disassembler.
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The number can be in decimal or prefixed with 0x in hex.
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Warning: Many of these options can produce a lot of
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output and make your system unusable. Be very careful.
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acpi.debug_level= [HW,ACPI]
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2005-04-16 22:20:36 +00:00
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Format: <int>
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2005-10-23 19:57:11 +00:00
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Each bit of the <int> indicates an ACPI debug level,
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2005-04-16 22:20:36 +00:00
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1: enable, 0: disable. It is useful for boot time
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debugging. After system has booted up, it can be set
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2007-04-24 05:53:22 +00:00
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via /sys/module/acpi/parameters/debug_level.
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CONFIG_ACPI_DEBUG must be enabled for this to produce any output.
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Available bits (add the numbers together) to enable different
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debug output levels of the ACPI subsystem:
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0x01 error 0x02 warn 0x04 init 0x08 debug object
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0x10 info 0x20 init names 0x40 parse 0x80 load
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0x100 dispatch 0x200 execute 0x400 names 0x800 operation region
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0x1000 bfield 0x2000 tables 0x4000 values 0x8000 objects
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0x10000 resources 0x20000 user requests 0x40000 package.
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The number can be in decimal or prefixed with 0x in hex.
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Warning: Many of these options can produce a lot of
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output and make your system unusable. Be very careful.
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2007-07-31 07:37:59 +00:00
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acpi_pm_good [X86-32,X86-64]
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2006-06-26 07:25:12 +00:00
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Override the pmtimer bug detection: force the kernel
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to assume that this machine's pmtimer latches its value
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and always returns good values.
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2007-07-27 00:46:20 +00:00
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agp= [AGP]
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{ off | try_unsupported }
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off: disable AGP support
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try_unsupported: try to drive unsupported chipsets
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(may crash computer or cause data corruption)
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2005-09-12 16:49:25 +00:00
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enable_timer_pin_1 [i386,x86-64]
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Enable PIN 1 of APIC timer
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2005-10-23 19:57:11 +00:00
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Can be useful to work around chipset bugs
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(in particular on some ATI chipsets).
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2005-09-12 16:49:25 +00:00
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The kernel tries to set a reasonable default.
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disable_timer_pin_1 [i386,x86-64]
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Disable PIN 1 of APIC timer
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Can be useful to work around chipset bugs.
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2005-04-16 22:20:36 +00:00
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ad1848= [HW,OSS]
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Format: <io>,<irq>,<dma>,<dma2>,<type>
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advansys= [HW,SCSI]
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See header of drivers/scsi/advansys.c.
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advwdt= [HW,WDT] Advantech WDT
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Format: <iostart>,<iostop>
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aedsp16= [HW,OSS] Audio Excel DSP 16
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Format: <io>,<irq>,<dma>,<mss_io>,<mpu_io>,<mpu_irq>
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See also header of sound/oss/aedsp16.c.
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2005-10-23 19:57:11 +00:00
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2005-04-16 22:20:36 +00:00
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aha152x= [HW,SCSI]
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See Documentation/scsi/aha152x.txt.
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aha1542= [HW,SCSI]
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Format: <portbase>[,<buson>,<busoff>[,<dmaspeed>]]
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aic7xxx= [HW,SCSI]
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See Documentation/scsi/aic7xxx.txt.
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aic79xx= [HW,SCSI]
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See Documentation/scsi/aic79xx.txt.
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amijoy.map= [HW,JOY] Amiga joystick support
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Map of devices attached to JOY0DAT and JOY1DAT
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Format: <a>,<b>
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See also Documentation/kernel/input/joystick.txt
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analog.map= [HW,JOY] Analog joystick and gamepad support
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Specifies type or capabilities of an analog joystick
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connected to one of 16 gameports
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Format: <type1>,<type2>,..<type16>
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2005-10-23 19:57:11 +00:00
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apc= [HW,SPARC]
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Power management functions (SPARCstation-4/5 + deriv.)
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2005-04-16 22:20:36 +00:00
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Format: noidle
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Disable APC CPU standby support. SPARCstation-Fox does
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not play well with APC CPU idle - disable it if you have
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APC and your system crashes randomly.
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2007-07-31 07:37:40 +00:00
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apic= [APIC,i386] Advanced Programmable Interrupt Controller
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|
|
|
Change the output verbosity whilst booting
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: { quiet (default) | verbose | debug }
|
|
|
|
Change the amount of debugging information output
|
|
|
|
when initialising the APIC and IO-APIC components.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
apm= [APM] Advanced Power Management
|
|
|
|
See header of arch/i386/kernel/apm.c.
|
|
|
|
|
|
|
|
arcrimi= [HW,NET] ARCnet - "RIM I" (entirely mem-mapped) cards
|
|
|
|
Format: <io>,<irq>,<nodeID>
|
|
|
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|
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|
|
ataflop= [HW,M68k]
|
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|
|
|
|
|
|
atarimouse= [HW,MOUSE] Atari Mouse
|
|
|
|
|
|
|
|
atascsi= [HW,SCSI] Atari SCSI
|
|
|
|
|
|
|
|
atkbd.extra= [HW] Enable extra LEDs and keys on IBM RapidAccess,
|
|
|
|
EzKey and similar keyboards
|
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|
|
|
|
|
|
atkbd.reset= [HW] Reset keyboard during initialization
|
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|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
atkbd.set= [HW] Select keyboard code set
|
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|
|
Format: <int> (2 = AT (default), 3 = PS/2)
|
2005-04-16 22:20:36 +00:00
|
|
|
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|
|
|
atkbd.scroll= [HW] Enable scroll wheel on MS Office and similar
|
|
|
|
keyboards
|
|
|
|
|
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|
|
atkbd.softraw= [HW] Choose between synthetic and real raw mode
|
|
|
|
Format: <bool> (0 = real, 1 = synthetic (default))
|
2005-10-23 19:57:11 +00:00
|
|
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|
|
|
|
atkbd.softrepeat= [HW]
|
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|
|
Use software keyboard repeat
|
2005-04-16 22:20:36 +00:00
|
|
|
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|
|
|
autotest [IA64]
|
|
|
|
|
|
|
|
baycom_epp= [HW,AX25]
|
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|
|
Format: <io>,<mode>
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
baycom_par= [HW,AX25] BayCom Parallel Port AX.25 Modem
|
|
|
|
Format: <io>,<mode>
|
|
|
|
See header of drivers/net/hamradio/baycom_par.c.
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
baycom_ser_fdx= [HW,AX25]
|
|
|
|
BayCom Serial Port AX.25 Modem (Full Duplex Mode)
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: <io>,<irq>,<mode>[,<baud>]
|
|
|
|
See header of drivers/net/hamradio/baycom_ser_fdx.c.
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
baycom_ser_hdx= [HW,AX25]
|
|
|
|
BayCom Serial Port AX.25 Modem (Half Duplex Mode)
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: <io>,<irq>,<mode>
|
|
|
|
See header of drivers/net/hamradio/baycom_ser_hdx.c.
|
|
|
|
|
2007-10-16 08:23:46 +00:00
|
|
|
boot_delay= Milliseconds to delay each printk during boot.
|
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|
|
Values larger than 10 seconds (10000) are changed to
|
|
|
|
no delay (0).
|
|
|
|
Format: integer
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
bttv.card= [HW,V4L] bttv (bt848 + bt878 based grabber cards)
|
2005-10-23 19:57:11 +00:00
|
|
|
bttv.radio= Most important insmod options are available as
|
|
|
|
kernel args too.
|
2005-04-16 22:20:36 +00:00
|
|
|
bttv.pll= See Documentation/video4linux/bttv/Insmod-options
|
|
|
|
bttv.tuner= and Documentation/video4linux/bttv/CARDLIST
|
|
|
|
|
|
|
|
BusLogic= [HW,SCSI]
|
|
|
|
See drivers/scsi/BusLogic.c, comment before function
|
|
|
|
BusLogic_ParseDriverOptions().
|
|
|
|
|
|
|
|
c101= [NET] Moxa C101 synchronous serial card
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
cachesize= [BUGS=X86-32] Override level 2 CPU cache size detection.
|
2005-04-16 22:20:36 +00:00
|
|
|
Sometimes CPU hardware bugs make them report the cache
|
|
|
|
size incorrectly. The kernel will attempt work arounds
|
|
|
|
to fix known problems, but for some CPUs it is not
|
|
|
|
possible to determine what the correct size should be.
|
|
|
|
This option provides an override for these situations.
|
|
|
|
|
2007-10-17 06:31:32 +00:00
|
|
|
capability.disable=
|
|
|
|
[SECURITY] Disable capabilities. This would normally
|
|
|
|
be used only if an alternative security model is to be
|
|
|
|
configured. Potentially dangerous and should only be
|
|
|
|
used if you are entirely sure of the consequences.
|
|
|
|
|
2008-01-26 13:10:37 +00:00
|
|
|
ccw_timeout_log [S390]
|
|
|
|
See Documentation/s390/CommonIO for details.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
checkreqprot [SELINUX] Set initial checkreqprot flag value.
|
|
|
|
Format: { "0" | "1" }
|
|
|
|
See security/selinux/Kconfig help text.
|
2005-10-23 19:57:11 +00:00
|
|
|
0 -- check protection applied by kernel (includes
|
|
|
|
any implied execute protection).
|
2005-04-16 22:20:36 +00:00
|
|
|
1 -- check protection requested by application.
|
|
|
|
Default value is set via a kernel config option.
|
2005-10-23 19:57:11 +00:00
|
|
|
Value can be changed at runtime via
|
|
|
|
/selinux/checkreqprot.
|
|
|
|
|
2008-01-26 13:10:36 +00:00
|
|
|
cio_ignore= [S390]
|
|
|
|
See Documentation/s390/CommonIO for details.
|
|
|
|
|
|
|
|
cio_msg= [S390]
|
|
|
|
See Documentation/s390/CommonIO for details.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
clock= [BUGS=X86-32, HW] gettimeofday clocksource override.
|
2006-06-26 07:25:05 +00:00
|
|
|
[Deprecated]
|
2006-10-03 20:45:33 +00:00
|
|
|
Forces specified clocksource (if available) to be used
|
2006-06-26 07:25:05 +00:00
|
|
|
when calculating gettimeofday(). If specified
|
2006-10-03 20:45:33 +00:00
|
|
|
clocksource is not available, it defaults to PIT.
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: { pit | tsc | cyclone | pmtmr }
|
|
|
|
|
2007-05-23 20:58:16 +00:00
|
|
|
clocksource= [GENERIC_TIME] Override the default clocksource
|
|
|
|
Format: <string>
|
|
|
|
Override the default clocksource and use the clocksource
|
|
|
|
with the name specified.
|
|
|
|
Some clocksource names to choose from, depending on
|
|
|
|
the platform:
|
|
|
|
[all] jiffies (this is the base, fallback clocksource)
|
|
|
|
[ACPI] acpi_pm
|
|
|
|
[ARM] imx_timer1,OSTS,netx_timer,mpu_timer2,
|
|
|
|
pxa_timer,timer3,32k_counter,timer0_1
|
|
|
|
[AVR32] avr32
|
2007-07-31 07:37:59 +00:00
|
|
|
[X86-32] pit,hpet,tsc,vmi-timer;
|
2007-05-23 20:58:16 +00:00
|
|
|
scx200_hrt on Geode; cyclone on IBM x440
|
|
|
|
[MIPS] MIPS
|
|
|
|
[PARISC] cr16
|
|
|
|
[S390] tod
|
|
|
|
[SH] SuperH
|
|
|
|
[SPARC64] tick
|
|
|
|
[X86-64] hpet,tsc
|
|
|
|
|
2007-02-13 12:26:25 +00:00
|
|
|
code_bytes [IA32] How many bytes of object code to print in an
|
|
|
|
oops report.
|
|
|
|
Range: 0 - 8192
|
|
|
|
Default: 64
|
|
|
|
|
2006-03-09 01:57:25 +00:00
|
|
|
disable_8254_timer
|
|
|
|
enable_8254_timer
|
|
|
|
[IA32/X86_64] Disable/Enable interrupt 0 timer routing
|
|
|
|
over the 8254 in addition to over the IO-APIC. The
|
|
|
|
kernel tries to set a sensible default.
|
|
|
|
|
2007-10-19 18:35:02 +00:00
|
|
|
hpet= [X86-32,HPET] option to control HPET usage
|
|
|
|
Format: { enable (default) | disable | force }
|
|
|
|
disable: disable HPET and use PIT instead
|
2007-10-19 17:51:27 +00:00
|
|
|
force: allow force enabled of undocumented chips (ICH4,
|
|
|
|
VIA, nVidia)
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
com20020= [HW,NET] ARCnet - COM20020 chipset
|
2005-10-23 19:57:11 +00:00
|
|
|
Format:
|
|
|
|
<io>[,<irq>[,<nodeID>[,<backplane>[,<ckp>[,<timeout>]]]]]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
com90io= [HW,NET] ARCnet - COM90xx chipset (IO-mapped buffers)
|
|
|
|
Format: <io>[,<irq>]
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
com90xx= [HW,NET]
|
|
|
|
ARCnet - COM90xx chipset (memory-mapped buffers)
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: <io>[,<irq>[,<memstart>]]
|
|
|
|
|
|
|
|
condev= [HW,S390] console device
|
|
|
|
conmode=
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
console= [KNL] Output console device and options.
|
|
|
|
|
|
|
|
tty<n> Use the virtual console device <n>.
|
|
|
|
|
|
|
|
ttyS<n>[,options]
|
2006-03-25 11:08:17 +00:00
|
|
|
ttyUSB0[,options]
|
2005-04-16 22:20:36 +00:00
|
|
|
Use the specified serial port. The options are of
|
2006-03-25 11:08:17 +00:00
|
|
|
the form "bbbbpnf", where "bbbb" is the baud rate,
|
|
|
|
"p" is parity ("n", "o", or "e"), "n" is number of
|
|
|
|
bits, and "f" is flow control ("r" for RTS or
|
|
|
|
omit it). Default is "9600n8".
|
|
|
|
|
|
|
|
See Documentation/serial-console.txt for more
|
|
|
|
information. See
|
|
|
|
Documentation/networking/netconsole.txt for an
|
|
|
|
alternative.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
serial: convert early_uart to earlycon for 8250
Beacuse SERIAL_PORT_DFNS is removed from include/asm-i386/serial.h and
include/asm-x86_64/serial.h. the serial8250_ports need to be probed late in
serial initializing stage. the console_init=>serial8250_console_init=>
register_console=>serial8250_console_setup will return -ENDEV, and console
ttyS0 can not be enabled at that time. need to wait till uart_add_one_port in
drivers/serial/serial_core.c to call register_console to get console ttyS0.
that is too late.
Make early_uart to use early_param, so uart console can be used earlier. Make
it to be bootconsole with CON_BOOT flag, so can use console handover feature.
and it will switch to corresponding normal serial console automatically.
new command line will be:
console=uart8250,io,0x3f8,9600n8
console=uart8250,mmio,0xff5e0000,115200n8
or
earlycon=uart8250,io,0x3f8,9600n8
earlycon=uart8250,mmio,0xff5e0000,115200n8
it will print in very early stage:
Early serial console at I/O port 0x3f8 (options '9600n8')
console [uart0] enabled
later for console it will print:
console handover: boot [uart0] -> real [ttyS0]
Signed-off-by: <yinghai.lu@sun.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Gerd Hoffmann <kraxel@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 06:37:59 +00:00
|
|
|
uart[8250],io,<addr>[,options]
|
|
|
|
uart[8250],mmio,<addr>[,options]
|
2005-04-16 22:20:36 +00:00
|
|
|
Start an early, polled-mode console on the 8250/16550
|
|
|
|
UART at the specified I/O port or MMIO address,
|
|
|
|
switching to the matching ttyS device later. The
|
|
|
|
options are the same as for ttyS, above.
|
|
|
|
|
serial: convert early_uart to earlycon for 8250
Beacuse SERIAL_PORT_DFNS is removed from include/asm-i386/serial.h and
include/asm-x86_64/serial.h. the serial8250_ports need to be probed late in
serial initializing stage. the console_init=>serial8250_console_init=>
register_console=>serial8250_console_setup will return -ENDEV, and console
ttyS0 can not be enabled at that time. need to wait till uart_add_one_port in
drivers/serial/serial_core.c to call register_console to get console ttyS0.
that is too late.
Make early_uart to use early_param, so uart console can be used earlier. Make
it to be bootconsole with CON_BOOT flag, so can use console handover feature.
and it will switch to corresponding normal serial console automatically.
new command line will be:
console=uart8250,io,0x3f8,9600n8
console=uart8250,mmio,0xff5e0000,115200n8
or
earlycon=uart8250,io,0x3f8,9600n8
earlycon=uart8250,mmio,0xff5e0000,115200n8
it will print in very early stage:
Early serial console at I/O port 0x3f8 (options '9600n8')
console [uart0] enabled
later for console it will print:
console handover: boot [uart0] -> real [ttyS0]
Signed-off-by: <yinghai.lu@sun.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Gerd Hoffmann <kraxel@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-16 06:37:59 +00:00
|
|
|
earlycon= [KNL] Output early console device and options.
|
|
|
|
uart[8250],io,<addr>[,options]
|
|
|
|
uart[8250],mmio,<addr>[,options]
|
|
|
|
Start an early, polled-mode console on the 8250/16550
|
|
|
|
UART at the specified I/O port or MMIO address.
|
|
|
|
The options are the same as for ttyS, above.
|
|
|
|
|
2007-10-18 10:04:50 +00:00
|
|
|
no_console_suspend
|
|
|
|
[HW] Never suspend the console
|
|
|
|
Disable suspending of consoles during suspend and
|
|
|
|
hibernate operations. Once disabled, debugging
|
|
|
|
messages can reach various consoles while the rest
|
|
|
|
of the system is being put to sleep (ie, while
|
|
|
|
debugging driver suspend/resume hooks). This may
|
|
|
|
not work reliably with all consoles, but is known
|
|
|
|
to work with serial and VGA consoles.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
cpcihp_generic= [HW,PCI] Generic port I/O CompactPCI driver
|
2005-10-23 19:57:11 +00:00
|
|
|
Format:
|
|
|
|
<first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-25 21:57:52 +00:00
|
|
|
crashkernel=nn[KMG]@ss[KMG]
|
|
|
|
[KNL] Reserve a chunk of physical memory to
|
|
|
|
hold a kernel to switch to with kexec on panic.
|
|
|
|
|
2007-10-19 06:41:02 +00:00
|
|
|
crashkernel=range1:size1[,range2:size2,...][@offset]
|
|
|
|
[KNL] Same as above, but depends on the memory
|
|
|
|
in the running system. The syntax of range is
|
|
|
|
start-[end] where start and end are both
|
|
|
|
a memory unit (amount[KMG]). See also
|
|
|
|
Documentation/kdump/kdump.txt for a example.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
cs4232= [HW,OSS]
|
|
|
|
Format: <io>,<irq>,<dma>,<dma2>,<mpuio>,<mpuirq>
|
|
|
|
|
|
|
|
cs89x0_dma= [HW,NET]
|
|
|
|
Format: <dma>
|
|
|
|
|
|
|
|
cs89x0_media= [HW,NET]
|
|
|
|
Format: { rj45 | aui | bnc }
|
2005-10-23 19:57:11 +00:00
|
|
|
|
|
|
|
dasd= [HW,NET]
|
2005-04-16 22:20:36 +00:00
|
|
|
See header of drivers/s390/block/dasd_devmap.c.
|
|
|
|
|
|
|
|
db9.dev[2|3]= [HW,JOY] Multisystem joystick support via parallel port
|
|
|
|
(one device per port)
|
|
|
|
Format: <port#>,<type>
|
|
|
|
See also Documentation/input/joystick-parport.txt
|
|
|
|
|
|
|
|
debug [KNL] Enable kernel debugging (events log level).
|
|
|
|
|
2006-07-03 07:24:48 +00:00
|
|
|
debug_locks_verbose=
|
|
|
|
[KNL] verbose self-tests
|
|
|
|
Format=<0|1>
|
|
|
|
Print debugging info while doing the locking API
|
|
|
|
self-tests.
|
|
|
|
We default to 0 (no extra messages), setting it to
|
|
|
|
1 will print _a lot_ more information - normally
|
|
|
|
only useful to kernel developers.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
decnet= [HW,NET]
|
|
|
|
Format: <area>[,<node>]
|
|
|
|
See also Documentation/networking/decnet.txt.
|
|
|
|
|
2008-01-03 16:17:54 +00:00
|
|
|
vt.default_blu= [VT]
|
2007-05-08 07:38:53 +00:00
|
|
|
Format: <blue0>,<blue1>,<blue2>,...,<blue15>
|
|
|
|
Change the default blue palette of the console.
|
|
|
|
This is a 16-member array composed of values
|
|
|
|
ranging from 0-255.
|
|
|
|
|
2008-01-03 16:17:54 +00:00
|
|
|
vt.default_grn= [VT]
|
2007-05-08 07:38:53 +00:00
|
|
|
Format: <green0>,<green1>,<green2>,...,<green15>
|
|
|
|
Change the default green palette of the console.
|
|
|
|
This is a 16-member array composed of values
|
|
|
|
ranging from 0-255.
|
|
|
|
|
2008-01-03 16:17:54 +00:00
|
|
|
vt.default_red= [VT]
|
2007-05-08 07:38:53 +00:00
|
|
|
Format: <red0>,<red1>,<red2>,...,<red15>
|
|
|
|
Change the default red palette of the console.
|
|
|
|
This is a 16-member array composed of values
|
|
|
|
ranging from 0-255.
|
|
|
|
|
2008-01-03 16:17:54 +00:00
|
|
|
vt.default_utf8=
|
|
|
|
[VT]
|
2007-05-08 07:38:53 +00:00
|
|
|
Format=<0|1>
|
|
|
|
Set system-wide default UTF-8 mode for all tty's.
|
2008-01-03 16:17:54 +00:00
|
|
|
Default is 1, i.e. UTF-8 mode is enabled for all
|
|
|
|
newly opened terminals.
|
2007-05-08 07:38:53 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
dhash_entries= [KNL]
|
|
|
|
Set number of hash buckets for dentry cache.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
digi= [HW,SERIAL]
|
|
|
|
IO parameters + enable/disable command.
|
|
|
|
|
|
|
|
digiepca= [HW,SERIAL]
|
|
|
|
See drivers/char/README.epca and
|
|
|
|
Documentation/digiepca.txt.
|
|
|
|
|
|
|
|
dmasound= [HW,OSS] Sound subsystem buffers
|
|
|
|
|
|
|
|
dscc4.setup= [NET]
|
|
|
|
|
|
|
|
dtc3181e= [HW,SCSI]
|
|
|
|
|
2007-10-09 09:24:49 +00:00
|
|
|
earlyprintk= [X86-32,X86-64,SH,BLACKFIN]
|
2005-04-16 22:20:36 +00:00
|
|
|
earlyprintk=vga
|
|
|
|
earlyprintk=serial[,ttySn[,baudrate]]
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
Append ",keep" to not disable it when the real console
|
2005-04-16 22:20:36 +00:00
|
|
|
takes over.
|
|
|
|
|
|
|
|
Only vga or serial at a time, not both.
|
|
|
|
|
|
|
|
Currently only ttyS0 and ttyS1 are supported.
|
|
|
|
|
|
|
|
Interaction with the standard serial driver is not
|
|
|
|
very good.
|
|
|
|
|
|
|
|
The VGA output is eventually overwritten by the real
|
|
|
|
console.
|
|
|
|
|
|
|
|
eata= [HW,SCSI]
|
|
|
|
|
|
|
|
edd= [EDD]
|
|
|
|
Format: {"of[f]" | "sk[ipmbr]"}
|
|
|
|
See comment in arch/i386/boot/edd.S
|
|
|
|
|
|
|
|
eisa_irq_edge= [PARISC,HW]
|
|
|
|
See header of drivers/parisc/eisa.c.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
elanfreq= [X86-32]
|
2005-04-16 22:20:36 +00:00
|
|
|
See comment before function elanfreq_setup() in
|
|
|
|
arch/i386/kernel/cpu/cpufreq/elanfreq.c.
|
|
|
|
|
|
|
|
elevator= [IOSCHED]
|
2006-01-14 21:21:20 +00:00
|
|
|
Format: {"anticipatory" | "cfq" | "deadline" | "noop"}
|
2005-10-23 19:57:11 +00:00
|
|
|
See Documentation/block/as-iosched.txt and
|
|
|
|
Documentation/block/deadline-iosched.txt for details.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
elfcorehdr= [X86-32, X86_64]
|
2005-10-23 19:57:11 +00:00
|
|
|
Specifies physical address of start of kernel core
|
2006-01-10 04:51:47 +00:00
|
|
|
image elf header. Generally kexec loader will
|
|
|
|
pass this option to capture kernel.
|
|
|
|
See Documentation/kdump/kdump.txt for details.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
enforcing [SELINUX] Set initial enforcing status.
|
|
|
|
Format: {"0" | "1"}
|
|
|
|
See security/selinux/Kconfig help text.
|
|
|
|
0 -- permissive (log only, no denials).
|
|
|
|
1 -- enforcing (deny and log).
|
|
|
|
Default value is 0.
|
|
|
|
Value can be changed at runtime via /selinux/enforce.
|
|
|
|
|
|
|
|
es1371= [HW,OSS]
|
|
|
|
Format: <spdif>,[<nomix>,[<amplifier>]]
|
|
|
|
See also header of sound/oss/es1371.c.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
ether= [HW,NET] Ethernet cards parameters
|
|
|
|
This option is obsoleted by the "netdev=" option, which
|
|
|
|
has equivalent usage. See its documentation for details.
|
|
|
|
|
|
|
|
eurwdt= [HW,WDT] Eurotech CPU-1220/1410 onboard watchdog.
|
|
|
|
Format: <io>[,<irq>]
|
|
|
|
|
2006-12-08 10:39:42 +00:00
|
|
|
failslab=
|
|
|
|
fail_page_alloc=
|
|
|
|
fail_make_request=[KNL]
|
|
|
|
General fault injection mechanism.
|
|
|
|
Format: <interval>,<probability>,<space>,<times>
|
|
|
|
See also /Documentation/fault-injection/.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
fd_mcs= [HW,SCSI]
|
|
|
|
See header of drivers/scsi/fd_mcs.c.
|
|
|
|
|
|
|
|
fdomain= [HW,SCSI]
|
|
|
|
See header of drivers/scsi/fdomain.c.
|
|
|
|
|
|
|
|
floppy= [HW]
|
|
|
|
See Documentation/floppy.txt.
|
|
|
|
|
|
|
|
gamecon.map[2|3]=
|
|
|
|
[HW,JOY] Multisystem joystick and NES/SNES/PSX pad
|
|
|
|
support via parallel port (up to 5 devices per port)
|
|
|
|
Format: <port#>,<pad1>,<pad2>,<pad3>,<pad4>,<pad5>
|
|
|
|
See also Documentation/input/joystick-parport.txt
|
|
|
|
|
|
|
|
gamma= [HW,DRM]
|
|
|
|
|
|
|
|
gdth= [HW,SCSI]
|
|
|
|
See header of drivers/scsi/gdth.c.
|
|
|
|
|
|
|
|
gpt [EFI] Forces disk with valid GPT signature but
|
|
|
|
invalid Protective MBR to be treated as GPT.
|
|
|
|
|
|
|
|
gvp11= [HW,SCSI]
|
|
|
|
|
|
|
|
hashdist= [KNL,NUMA] Large hashes allocated during boot
|
|
|
|
are distributed across NUMA nodes. Defaults on
|
|
|
|
for IA-64, off otherwise.
|
2005-10-23 19:57:11 +00:00
|
|
|
Format: 0 | 1 (for off | on)
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
hcl= [IA-64] SGI's Hardware Graph compatibility layer
|
|
|
|
|
|
|
|
hd= [EIDE] (E)IDE hard drive subsystem geometry
|
|
|
|
Format: <cyl>,<head>,<sect>
|
|
|
|
|
|
|
|
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 <nn>. This works even on boxes that have no
|
|
|
|
highmem otherwise. This also works to reduce highmem
|
|
|
|
size on bigger boxes.
|
|
|
|
|
2007-02-16 09:28:11 +00:00
|
|
|
highres= [KNL] Enable/disable high resolution timer mode.
|
|
|
|
Valid parameters: "on", "off"
|
|
|
|
Default: "on"
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
hisax= [HW,ISDN]
|
|
|
|
See Documentation/isdn/README.HiSax.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
hugepages= [HW,X86-32,IA-64] Maximal number of HugeTLB pages.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
i8042.direct [HW] Put keyboard port into non-translated mode
|
2006-10-03 20:53:09 +00:00
|
|
|
i8042.dumbkbd [HW] Pretend that controller can only read data from
|
|
|
|
keyboard and cannot control its state
|
2005-04-16 22:20:36 +00:00
|
|
|
(Don't attempt to blink the leds)
|
|
|
|
i8042.noaux [HW] Don't check for auxiliary (== mouse) port
|
2005-09-04 06:42:00 +00:00
|
|
|
i8042.nokbd [HW] Don't check/create keyboard port
|
2005-04-16 22:20:36 +00:00
|
|
|
i8042.nomux [HW] Don't check presence of an active multiplexing
|
|
|
|
controller
|
|
|
|
i8042.nopnp [HW] Don't use ACPIPnP / PnPBIOS to discover KBD/AUX
|
|
|
|
controllers
|
|
|
|
i8042.panicblink=
|
|
|
|
[HW] Frequency with which keyboard LEDs should blink
|
|
|
|
when kernel panics (default is 0.5 sec)
|
|
|
|
i8042.reset [HW] Reset the controller during init and cleanup
|
|
|
|
i8042.unlock [HW] Unlock (ignore) the keylock
|
|
|
|
|
|
|
|
i810= [HW,DRM]
|
|
|
|
|
2005-06-25 21:54:25 +00:00
|
|
|
i8k.ignore_dmi [HW] Continue probing hardware even if DMI data
|
|
|
|
indicates that the driver is running on unsupported
|
|
|
|
hardware.
|
2005-04-16 22:20:36 +00:00
|
|
|
i8k.force [HW] Activate i8k driver even if SMM BIOS signature
|
|
|
|
does not match list of supported models.
|
|
|
|
i8k.power_status
|
|
|
|
[HW] Report power status in /proc/i8k
|
|
|
|
(disabled by default)
|
|
|
|
i8k.restricted [HW] Allow controlling fans only if SYS_ADMIN
|
|
|
|
capability is set.
|
|
|
|
|
|
|
|
ibmmcascsi= [HW,MCA,SCSI] IBM MicroChannel SCSI adapter
|
|
|
|
See Documentation/mca.txt.
|
|
|
|
|
|
|
|
icn= [HW,ISDN]
|
|
|
|
Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]]
|
|
|
|
|
|
|
|
ide= [HW] (E)IDE subsystem
|
|
|
|
Format: ide=nodma or ide=doubler or ide=reverse
|
|
|
|
See Documentation/ide.txt.
|
|
|
|
|
|
|
|
ide?= [HW] (E)IDE subsystem
|
|
|
|
Format: ide?=noprobe or chipset specific parameters.
|
|
|
|
See Documentation/ide.txt.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
idebus= [HW] (E)IDE subsystem - VLB/PCI bus speed
|
|
|
|
See Documentation/ide.txt.
|
|
|
|
|
2007-05-02 17:27:12 +00:00
|
|
|
idle= [X86]
|
|
|
|
Format: idle=poll or idle=mwait
|
|
|
|
Poll forces a polling idle loop that can slightly improves the performance
|
|
|
|
of waking up a idle CPU, but will use a lot of power and make the system
|
|
|
|
run hot. Not recommended.
|
|
|
|
idle=mwait. On systems which support MONITOR/MWAIT but the kernel chose
|
|
|
|
to not use it because it doesn't save as much power as a normal idle
|
|
|
|
loop use the MONITOR/MWAIT idle loop anyways. Performance should be the same
|
|
|
|
as idle=poll.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2006-12-07 04:40:51 +00:00
|
|
|
ignore_loglevel [KNL]
|
|
|
|
Ignore loglevel setting - this will print /all/
|
|
|
|
kernel messages to the console. Useful for debugging.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
ihash_entries= [KNL]
|
|
|
|
Set number of hash buckets for inode cache.
|
|
|
|
|
|
|
|
in2000= [HW,SCSI]
|
|
|
|
See header of drivers/scsi/in2000.c.
|
|
|
|
|
|
|
|
init= [KNL]
|
|
|
|
Format: <full_path>
|
|
|
|
Run specified binary instead of /sbin/init as init
|
|
|
|
process.
|
|
|
|
|
|
|
|
initcall_debug [KNL] Trace initcalls as they are executed. Useful
|
|
|
|
for working out where the kernel is dying during
|
|
|
|
startup.
|
|
|
|
|
|
|
|
initrd= [BOOT] Specify the location of the initial ramdisk
|
|
|
|
|
|
|
|
inport.irq= [HW] Inport (ATI XL and Microsoft) busmouse driver
|
|
|
|
Format: <irq>
|
|
|
|
|
|
|
|
inttest= [IA64]
|
|
|
|
|
2007-10-21 23:41:49 +00:00
|
|
|
intel_iommu= [DMAR] Intel IOMMU driver (DMAR) option
|
|
|
|
off
|
|
|
|
Disable intel iommu driver.
|
|
|
|
igfx_off [Default Off]
|
|
|
|
By default, gfx is mapped as normal device. If a gfx
|
|
|
|
device has a dedicated DMAR unit, the DMAR unit is
|
|
|
|
bypassed by not enabling DMAR with this option. In
|
|
|
|
this case, gfx device will use physical address for
|
|
|
|
DMA.
|
2007-10-21 23:41:53 +00:00
|
|
|
forcedac [x86_64]
|
|
|
|
With this option iommu will not optimize to look
|
|
|
|
for io virtual address below 32 bit forcing dual
|
|
|
|
address cycle on pci bus for cards supporting greater
|
|
|
|
than 32 bit addressing. The default is to look
|
|
|
|
for translation below 32 bit and if not available
|
|
|
|
then look in the higher range.
|
2007-10-21 23:41:49 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
io7= [HW] IO7 for Marvel based alpha systems
|
|
|
|
See comment before marvel_specify_io7 in
|
|
|
|
arch/alpha/kernel/core_marvel.c.
|
|
|
|
|
|
|
|
ip= [IP_PNP]
|
|
|
|
See Documentation/nfsroot.txt.
|
|
|
|
|
|
|
|
ip2= [HW] Set IO/IRQ pairs for up to 4 IntelliPort boards
|
2007-07-31 07:37:40 +00:00
|
|
|
See comment before ip2_setup() in
|
|
|
|
drivers/char/ip2/ip2base.c.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
ips= [HW,SCSI] Adaptec / IBM ServeRAID controller
|
|
|
|
See header of drivers/scsi/ips.c.
|
|
|
|
|
2006-09-14 02:57:18 +00:00
|
|
|
ports= [IP_VS_FTP] IPVS ftp helper module
|
|
|
|
Default is 21.
|
|
|
|
Up to 8 (IP_VS_APP_MAX_PORTS) ports
|
|
|
|
may be specified.
|
|
|
|
Format: <port>,<port>....
|
|
|
|
|
2005-06-29 03:45:18 +00:00
|
|
|
irqfixup [HW]
|
|
|
|
When an interrupt is not handled search all handlers
|
|
|
|
for it. Intended to get systems with badly broken
|
|
|
|
firmware running.
|
|
|
|
|
|
|
|
irqpoll [HW]
|
|
|
|
When an interrupt is not handled search all handlers
|
|
|
|
for it. Also check all handlers each timer
|
|
|
|
interrupt. Intended to get systems with badly broken
|
|
|
|
firmware running.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
isapnp= [ISAPNP]
|
2005-10-23 19:57:11 +00:00
|
|
|
Format: <RDP>,<reset>,<pci_scan>,<verbosity>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
isolcpus= [KNL,SMP] Isolate CPUs from the general scheduler.
|
2006-12-07 04:37:11 +00:00
|
|
|
Format:
|
|
|
|
<cpu number>,...,<cpu number>
|
|
|
|
or
|
|
|
|
<cpu number>-<cpu number> (must be a positive range in ascending order)
|
|
|
|
or a mixture
|
|
|
|
<cpu number>,...,<cpu number>-<cpu number>
|
2005-04-16 22:20:36 +00:00
|
|
|
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.
|
|
|
|
<cpu number> begins at 0 and the maximum value is
|
|
|
|
"number of CPUs in system - 1".
|
|
|
|
|
|
|
|
This option is the preferred way to isolate CPUs. The
|
2005-10-23 19:57:11 +00:00
|
|
|
alternative -- manually setting the CPU mask of all
|
|
|
|
tasks in the system -- can cause problems and
|
|
|
|
suboptimal load balancer performance.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
iucv= [HW,NET]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
js= [HW,JOY] Analog joystick
|
|
|
|
See Documentation/input/joystick.txt.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
kernelcore=nn[KMG] [KNL,X86-32,IA-64,PPC,X86-64] This parameter
|
2007-07-17 11:03:14 +00:00
|
|
|
specifies the amount of memory usable by the kernel
|
|
|
|
for non-movable allocations. The requested amount is
|
|
|
|
spread evenly throughout all nodes in the system. The
|
|
|
|
remaining memory in each node is used for Movable
|
|
|
|
pages. In the event, a node is too small to have both
|
|
|
|
kernelcore and Movable pages, kernelcore pages will
|
|
|
|
take priority and other nodes will have a larger number
|
|
|
|
of kernelcore pages. The Movable zone is used for the
|
|
|
|
allocation of pages that may be reclaimed or moved
|
|
|
|
by the page migration subsystem. This means that
|
|
|
|
HugeTLB pages may not be allocated from this zone.
|
|
|
|
Note that allocations like PTEs-from-HighMem still
|
|
|
|
use the HighMem zone if it exists, and the Normal
|
|
|
|
zone if it does not.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
movablecore=nn[KMG] [KNL,X86-32,IA-64,PPC,X86-64] This parameter
|
2007-07-17 11:03:15 +00:00
|
|
|
is similar to kernelcore except it specifies the
|
|
|
|
amount of memory used for migratable allocations.
|
|
|
|
If both kernelcore and movablecore is specified,
|
|
|
|
then kernelcore will be at *least* the specified
|
|
|
|
value but may be more. If movablecore on its own
|
|
|
|
is specified, the administrator must be careful
|
|
|
|
that the amount of memory usable for all allocations
|
|
|
|
is not too small.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
keepinitrd [HW,ARM]
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
kstack=N [X86-32,X86-64] Print N words from the kernel stack
|
2005-04-16 22:20:36 +00:00
|
|
|
in oops dumps.
|
|
|
|
|
|
|
|
l2cr= [PPC]
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
lapic [X86-32,APIC] Enable the local APIC even if BIOS
|
2005-10-23 19:57:11 +00:00
|
|
|
disabled it.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
lapic_timer_c2_ok [X86-32,x86-64,APIC] trust the local apic timer in
|
2007-03-23 15:08:01 +00:00
|
|
|
C2 power state.
|
|
|
|
|
2008-01-06 18:08:56 +00:00
|
|
|
libata.dma= [LIBATA] DMA control
|
|
|
|
libata.dma=0 Disable all PATA and SATA DMA
|
|
|
|
libata.dma=1 PATA and SATA Disk DMA only
|
|
|
|
libata.dma=2 ATAPI (CDROM) DMA only
|
|
|
|
libata.dma=4 Compact Flash DMA only
|
|
|
|
Combinations also work, so libata.dma=3 enables DMA
|
|
|
|
for disks and CDROMs, but not CFs.
|
|
|
|
|
2007-09-27 15:50:13 +00:00
|
|
|
libata.noacpi [LIBATA] Disables use of ACPI in libata suspend/resume
|
|
|
|
when set.
|
|
|
|
Format: <int>
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
load_ramdisk= [RAM] List of ramdisks to load from floppy
|
|
|
|
See Documentation/ramdisk.txt.
|
|
|
|
|
2006-01-14 21:21:19 +00:00
|
|
|
lockd.nlm_grace_period=P [NFS] Assign grace period.
|
|
|
|
Format: <integer>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-01-14 21:21:19 +00:00
|
|
|
lockd.nlm_tcpport=N [NFS] Assign TCP port.
|
|
|
|
Format: <integer>
|
|
|
|
|
|
|
|
lockd.nlm_timeout=T [NFS] Assign timeout value.
|
|
|
|
Format: <integer>
|
|
|
|
|
|
|
|
lockd.nlm_udpport=M [NFS] Assign UDP port.
|
|
|
|
Format: <integer>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
logibm.irq= [HW,MOUSE] Logitech Bus Mouse Driver
|
|
|
|
Format: <irq>
|
|
|
|
|
|
|
|
loglevel= All Kernel Messages with a loglevel smaller than the
|
|
|
|
console loglevel will be printed to the console. It can
|
|
|
|
also be changed with klogd or other programs. The
|
|
|
|
loglevels are defined as follows:
|
|
|
|
|
|
|
|
0 (KERN_EMERG) system is unusable
|
|
|
|
1 (KERN_ALERT) action must be taken immediately
|
|
|
|
2 (KERN_CRIT) critical conditions
|
|
|
|
3 (KERN_ERR) error conditions
|
|
|
|
4 (KERN_WARNING) warning conditions
|
|
|
|
5 (KERN_NOTICE) normal but significant condition
|
|
|
|
6 (KERN_INFO) informational
|
|
|
|
7 (KERN_DEBUG) debug-level messages
|
|
|
|
|
|
|
|
log_buf_len=n Sets the size of the printk ring buffer, in bytes.
|
2005-10-23 19:57:11 +00:00
|
|
|
Format: { n | nk | nM }
|
|
|
|
n must be a power of two. The default size
|
|
|
|
is set in the kernel config file.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-10-16 08:29:37 +00:00
|
|
|
logo.nologo [FB] Disables display of the built-in Linux logo.
|
|
|
|
This may be used to provide more screen space for
|
|
|
|
kernel log messages and is useful when debugging
|
|
|
|
kernel boot problems.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
lp=0 [LP] Specify parallel ports to use, e.g,
|
|
|
|
lp=port[,port...] lp=none,parport0 (lp0 not configured, lp1 uses
|
|
|
|
lp=reset first parallel port). 'lp=0' disables the
|
|
|
|
lp=auto printer driver. 'lp=reset' (which can be
|
|
|
|
specified in addition to the ports) causes
|
|
|
|
attached printers to be reset. Using
|
|
|
|
lp=port1,port2,... specifies the parallel ports
|
|
|
|
to associate lp devices with, starting with
|
|
|
|
lp0. A port specification may be 'none' to skip
|
|
|
|
that lp device, or a parport name such as
|
|
|
|
'parport0'. Specifying 'lp=auto' instead of a
|
|
|
|
port specification list means that device IDs
|
|
|
|
from each port should be examined, to see if
|
|
|
|
an IEEE 1284-compliant printer is attached; if
|
|
|
|
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: <io>,<irq>,<dma>
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
mac5380= [HW,SCSI] Format:
|
|
|
|
<can_queue>,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
mac53c9x= [HW,SCSI] Format:
|
|
|
|
<num_esps>,<disconnect>,<nosync>,<can_queue>,<cmd_per_lun>,<sg_tablesize>,<hostid>,<use_tags>
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
machvec= [IA64] Force the use of a particular machine-vector
|
|
|
|
(machvec) in a generic kernel.
|
|
|
|
Example: machvec=hpzx1_swiotlb
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
max_loop= [LOOP] Maximum number of loopback devices that can
|
2005-04-16 22:20:36 +00:00
|
|
|
be mounted
|
|
|
|
Format: <1-256>
|
|
|
|
|
|
|
|
maxcpus= [SMP] Maximum number of processors that an SMP kernel
|
2007-08-16 07:34:22 +00:00
|
|
|
should make use of. maxcpus=n : n >= 0 limits the
|
|
|
|
kernel to using 'n' processors. n=0 is a special case,
|
|
|
|
it is equivalent to "nosmp", which also disables
|
|
|
|
the IO APIC.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2005-06-30 01:00:00 +00:00
|
|
|
max_addr=[KMG] [KNL,BOOT,ia64] All physical memory greater than or
|
|
|
|
equal to this physical address is ignored.
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
max_luns= [SCSI] Maximum number of LUNs to probe.
|
2005-04-16 22:20:36 +00:00
|
|
|
Should be between 1 and 2^32-1.
|
|
|
|
|
|
|
|
max_report_luns=
|
2005-10-23 19:57:11 +00:00
|
|
|
[SCSI] Maximum number of LUNs received.
|
2005-04-16 22:20:36 +00:00
|
|
|
Should be between 1 and 16384.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
mca-pentium [BUGS=X86-32]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
mcatest= [IA-64]
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
mce [X86-32] Machine Check Exception
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-10-17 16:04:38 +00:00
|
|
|
mce=option [X86-64] See Documentation/x86_64/boot-options.txt
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
md= [HW] RAID subsystems devices and level
|
|
|
|
See Documentation/md.txt.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
mdacon= [MDA]
|
|
|
|
Format: <first>,<last>
|
|
|
|
Specifies range of consoles to be captured by the MDA.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
mem=nn[KMG] [KNL,BOOT] Force usage of a specific amount of memory
|
|
|
|
Amount of memory to be used when the kernel is not able
|
|
|
|
to see the whole system memory or for test.
|
2007-07-31 07:37:59 +00:00
|
|
|
[X86-32] Use together with memmap= to avoid physical
|
2005-04-16 22:20:36 +00:00
|
|
|
address space collisions. Without memmap= PCI devices
|
|
|
|
could be placed at addresses belonging to unused RAM.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
mem=nopentium [BUGS=X86-32] Disable usage of 4MB pages for kernel
|
2005-04-16 22:20:36 +00:00
|
|
|
memory.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
memmap=exactmap [KNL,X86-32,X86_64] Enable setting of an exact
|
2005-04-16 22:20:36 +00:00
|
|
|
E820 memory map, as specified by the user.
|
|
|
|
Such memmap=exactmap lines can be constructed based on
|
|
|
|
BIOS output or other requirements. See the memmap=nn@ss
|
|
|
|
option description.
|
|
|
|
|
|
|
|
memmap=nn[KMG]@ss[KMG]
|
|
|
|
[KNL] Force usage of a specific region of memory
|
|
|
|
Region of memory to be used, from ss to ss+nn.
|
|
|
|
|
|
|
|
memmap=nn[KMG]#ss[KMG]
|
|
|
|
[KNL,ACPI] Mark specific memory as ACPI data.
|
|
|
|
Region of memory to be used, from ss to ss+nn.
|
|
|
|
|
|
|
|
memmap=nn[KMG]$ss[KMG]
|
|
|
|
[KNL,ACPI] Mark specific memory as reserved.
|
|
|
|
Region of memory to be used, from ss to ss+nn.
|
|
|
|
|
|
|
|
meye.*= [HW] Set MotionEye Camera parameters
|
|
|
|
See Documentation/video4linux/meye.txt.
|
|
|
|
|
2007-10-12 21:04:06 +00:00
|
|
|
mfgpt_irq= [IA-32] Specify the IRQ to use for the
|
|
|
|
Multi-Function General Purpose Timers on AMD Geode
|
|
|
|
platforms.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
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: <msecs>
|
|
|
|
mousedev.xres= [MOUSE] Horizontal screen resolution, used for devices
|
|
|
|
reporting absolute coordinates, such as tablets
|
|
|
|
mousedev.yres= [MOUSE] Vertical screen resolution, used for devices
|
|
|
|
reporting absolute coordinates, such as tablets
|
|
|
|
|
|
|
|
mpu401= [HW,OSS]
|
|
|
|
Format: <io>,<irq>
|
|
|
|
|
|
|
|
MTD_Partition= [MTD]
|
|
|
|
Format: <name>,<region-number>,<size>,<offset>
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
MTD_Region= [MTD] Format:
|
|
|
|
<name>,<region-number>[,<base>,<size>,<buswidth>,<altbuswidth>]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
mtdparts= [MTD]
|
2007-07-31 07:37:40 +00:00
|
|
|
See drivers/mtd/cmdlinepart.c.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
mtouchusb.raw_coordinates=
|
2005-10-23 19:57:11 +00:00
|
|
|
[HW] Make the MicroTouch USB driver use raw coordinates
|
|
|
|
('y', default) or cooked coordinates ('n')
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
n2= [NET] SDL Inc. RISCom/N2 synchronous serial card
|
|
|
|
|
|
|
|
NCR_D700= [HW,SCSI]
|
|
|
|
See header of drivers/scsi/NCR_D700.c.
|
|
|
|
|
|
|
|
ncr5380= [HW,SCSI]
|
|
|
|
|
|
|
|
ncr53c400= [HW,SCSI]
|
|
|
|
|
|
|
|
ncr53c400a= [HW,SCSI]
|
|
|
|
|
|
|
|
ncr53c406a= [HW,SCSI]
|
|
|
|
|
|
|
|
ncr53c8xx= [HW,SCSI]
|
|
|
|
|
|
|
|
netdev= [NET] Network devices parameters
|
|
|
|
Format: <irq>,<io>,<mem_start>,<mem_end>,<name>
|
|
|
|
Note that mem_start is often overloaded to mean
|
|
|
|
something different and driver-specific.
|
2005-10-23 19:57:11 +00:00
|
|
|
This usage is only documented in each driver source
|
|
|
|
file if at all.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
nfsaddrs= [NFS]
|
|
|
|
See Documentation/nfsroot.txt.
|
|
|
|
|
|
|
|
nfsroot= [NFS] nfs root filesystem for disk-less boxes.
|
|
|
|
See Documentation/nfsroot.txt.
|
|
|
|
|
2006-01-03 08:55:41 +00:00
|
|
|
nfs.callback_tcpport=
|
|
|
|
[NFS] set the TCP port on which the NFSv4 callback
|
|
|
|
channel should listen.
|
|
|
|
|
2006-01-03 08:55:57 +00:00
|
|
|
nfs.idmap_cache_timeout=
|
|
|
|
[NFS] set the maximum lifetime for idmapper cache
|
|
|
|
entries.
|
|
|
|
|
2007-10-09 16:01:04 +00:00
|
|
|
nfs.enable_ino64=
|
|
|
|
[NFS] enable 64-bit inode numbers.
|
|
|
|
If zero, the NFS client will fake up a 32-bit inode
|
|
|
|
number for the readdir() and stat() syscalls instead
|
|
|
|
of returning the full 64-bit number.
|
|
|
|
The default is to return 64-bit inode numbers.
|
|
|
|
|
2007-10-10 12:58:29 +00:00
|
|
|
nmi_debug= [KNL,AVR32] Specify one or more actions to take
|
|
|
|
when a NMI is triggered.
|
|
|
|
Format: [state][,regs][,debounce][,die]
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
nmi_watchdog= [KNL,BUGS=X86-32] Debugging features for SMP kernels
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
no387 [BUGS=X86-32] Tells the kernel to use the 387 maths
|
2005-04-16 22:20:36 +00:00
|
|
|
emulation library even if a 387 maths coprocessor
|
|
|
|
is present.
|
|
|
|
|
2007-05-31 07:40:47 +00:00
|
|
|
noaliencache [MM, NUMA, SLAB] Disables the allocation of alien
|
|
|
|
caches in the slab allocator. Saves per-node memory,
|
|
|
|
but will impact performance.
|
2006-12-07 04:32:16 +00:00
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
noalign [KNL,ARM]
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
noapic [SMP,APIC] Tells the kernel to not make use of any
|
|
|
|
IOAPICs that may be present in the system.
|
|
|
|
|
|
|
|
nobats [PPC] Do not use BATs for mapping kernel lowmem
|
|
|
|
on "Classic" PPC cores.
|
|
|
|
|
|
|
|
nocache [ARM]
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2006-07-30 10:03:11 +00:00
|
|
|
nodelayacct [KNL] Disable per-task delay accounting
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
nodisconnect [HW,SCSI,M68K] Disables SCSI disconnects.
|
|
|
|
|
|
|
|
noexec [IA-64]
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
noexec [X86-32,X86-64]
|
2005-04-16 22:20:36 +00:00
|
|
|
noexec=on: enable non-executable mappings (default)
|
|
|
|
noexec=off: disable nn-executable mappings
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
nofxsr [BUGS=X86-32] Disables x86 floating point extended
|
2006-03-23 10:59:34 +00:00
|
|
|
register save and restore. The kernel will only save
|
|
|
|
legacy floating-point registers on task switch.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
nohlt [BUGS=ARM]
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
no-hlt [BUGS=X86-32] Tells the kernel that the hlt
|
2005-04-16 22:20:36 +00:00
|
|
|
instruction doesn't work correctly and not to
|
|
|
|
use it.
|
|
|
|
|
|
|
|
nohalt [IA-64] Tells the kernel not to use the power saving
|
|
|
|
function PAL_HALT_LIGHT when idle. This increases
|
|
|
|
power-consumption. On the positive side, it reduces
|
|
|
|
interrupt wake-up latency, which may improve performance
|
|
|
|
in certain environments such as networked servers or
|
|
|
|
real-time systems.
|
|
|
|
|
2007-02-16 09:28:03 +00:00
|
|
|
nohz= [KNL] Boottime enable/disable dynamic ticks
|
|
|
|
Valid arguments: on, off
|
|
|
|
Default: on
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
noirqbalance [X86-32,SMP,KNL] Disable kernel irq balancing
|
2006-12-07 01:14:09 +00:00
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
noirqdebug [X86-32] Disables the code which attempts to detect and
|
2005-04-16 22:20:36 +00:00
|
|
|
disable unhandled interrupt sources.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
no_timer_check [X86-32,X86_64,APIC] Disables the code which tests for
|
2006-12-07 01:14:09 +00:00
|
|
|
broken timer IRQ sources.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
noisapnp [ISAPNP] Disables ISA PnP code.
|
|
|
|
|
|
|
|
noinitrd [RAM] Tells the kernel not to load any configured
|
|
|
|
initial RAM disk.
|
|
|
|
|
|
|
|
nointroute [IA-64]
|
|
|
|
|
2007-07-20 18:22:30 +00:00
|
|
|
nojitter [IA64] Disables jitter checking for ITC timers.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
nolapic [X86-32,APIC] Do not enable or use the local APIC.
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
nolapic_timer [X86-32,APIC] Do not use the local APIC timer.
|
2007-03-22 08:11:21 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
noltlbs [PPC] Do not use large page/tlb entries for kernel
|
|
|
|
lowmem mapping on PPC40x.
|
|
|
|
|
2006-02-22 00:57:55 +00:00
|
|
|
nomca [IA-64] Disable machine check abort handling
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
nomce [X86-32] Machine Check Exception
|
2006-03-31 23:36:09 +00:00
|
|
|
|
2007-10-12 21:04:06 +00:00
|
|
|
nomfgpt [X86-32] Disable Multi-Function General Purpose
|
|
|
|
Timer usage (for AMD Geode machines).
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
noreplace-paravirt [X86-32,PV_OPS] Don't patch paravirt_ops
|
2007-05-02 17:27:16 +00:00
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
noreplace-smp [X86-32,SMP] Don't replace SMP instructions
|
2007-05-02 17:27:13 +00:00
|
|
|
with UP alternatives
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
noresidual [PPC] Don't use residual data on PReP machines.
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
noresume [SWSUSP] Disables resume and restores original swap
|
|
|
|
space.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
no-scroll [VGA] Disables scrollback.
|
|
|
|
This is required for the Braillex ib80-piezo Braille
|
|
|
|
reader made by F.H. Papenmeier (Germany).
|
|
|
|
|
|
|
|
nosbagart [IA-64]
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
nosep [BUGS=X86-32] Disables x86 SYSENTER/SYSEXIT support.
|
2006-03-23 10:59:34 +00:00
|
|
|
|
2007-08-16 07:34:22 +00:00
|
|
|
nosmp [SMP] Tells an SMP kernel to act as a UP kernel,
|
|
|
|
and disable the IO APIC. legacy for "maxcpus=0".
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2007-07-16 06:41:05 +00:00
|
|
|
nosoftlockup [KNL] Disable the soft-lockup detector.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
nosync [HW,M68K] Disables sync negotiation for all devices.
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
notsc [BUGS=X86-32] Disable Time Stamp Counter
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
nousb [USB] Disable the USB subsystem
|
|
|
|
|
|
|
|
nowb [ARM]
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2007-07-16 06:38:01 +00:00
|
|
|
numa_zonelist_order= [KNL, BOOT] Select zonelist order for NUMA.
|
|
|
|
one of ['zone', 'node', 'default'] can be specified
|
|
|
|
This can be set from sysctl after boot.
|
|
|
|
See Documentation/sysctl/vm.txt for details.
|
|
|
|
|
2006-01-07 23:18:19 +00:00
|
|
|
nr_uarts= [SERIAL] maximum number of UARTs to be registered.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
opl3= [HW,OSS]
|
|
|
|
Format: <io>
|
|
|
|
|
|
|
|
oprofile.timer= [HW]
|
|
|
|
Use timer interrupt instead of performance counters
|
|
|
|
|
|
|
|
osst= [HW,SCSI] SCSI Tape Driver
|
|
|
|
Format: <buffer_size>,<write_threshold>
|
|
|
|
See also Documentation/scsi/st.txt.
|
|
|
|
|
|
|
|
panic= [KNL] Kernel behaviour on panic
|
|
|
|
Format: <timeout>
|
|
|
|
|
|
|
|
parkbd.port= [HW] Parallel port number the keyboard adapter is
|
|
|
|
connected to, default is 0.
|
|
|
|
Format: <parport#>
|
|
|
|
parkbd.mode= [HW] Parallel port keyboard adapter mode of operation,
|
|
|
|
0 for XT, 1 for AT (default is AT).
|
2005-10-23 19:57:11 +00:00
|
|
|
Format: <mode>
|
|
|
|
|
|
|
|
parport= [HW,PPT] Specify parallel ports. 0 disables.
|
|
|
|
Format: { 0 | auto | 0xBBB[,IRQ[,DMA]] }
|
|
|
|
Use 'auto' to force the driver to use any
|
|
|
|
IRQ/DMA settings detected (the default is to
|
|
|
|
ignore detected IRQ/DMA settings because of
|
|
|
|
possible conflicts). You can specify the base
|
|
|
|
address, IRQ, and DMA settings; IRQ and DMA
|
|
|
|
should be numbers, or 'auto' (for using detected
|
|
|
|
settings on that particular port), or 'nofifo'
|
|
|
|
(to avoid using a FIFO even if it is detected).
|
|
|
|
Parallel ports are assigned in the order they
|
|
|
|
are specified on the command line, starting
|
|
|
|
with parport0.
|
|
|
|
|
|
|
|
parport_init_mode= [HW,PPT]
|
|
|
|
Configure VIA parallel port to operate in
|
|
|
|
a specific mode. This is necessary on Pegasos
|
|
|
|
computer where firmware has no options for setting
|
|
|
|
up parallel port mode and sets it to spp.
|
|
|
|
Currently this function knows 686a and 8231 chips.
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: [spp|ps2|epp|ecp|ecpepp]
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
pas2= [HW,OSS] Format:
|
|
|
|
<io>,<irq>,<dma>,<dma16>,<sb_io>,<sb_irq>,<sb_dma>,<sb_dma16>
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
pas16= [HW,SCSI]
|
|
|
|
See header of drivers/scsi/pas16.c.
|
|
|
|
|
2006-03-23 11:00:57 +00:00
|
|
|
pause_on_oops=
|
|
|
|
Halt all CPUs after the first oops has been printed for
|
|
|
|
the specified number of seconds. This is to be used if
|
|
|
|
your oopses keep scrolling off the screen.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
pcbit= [HW,ISDN]
|
|
|
|
|
|
|
|
pcd. [PARIDE]
|
|
|
|
See header of drivers/block/paride/pcd.c.
|
|
|
|
See also Documentation/paride.txt.
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
pci=option[,option...] [PCI] various PCI subsystem options:
|
2007-07-31 07:37:59 +00:00
|
|
|
off [X86-32] don't probe for the PCI bus
|
|
|
|
bios [X86-32] force use of PCI BIOS, don't access
|
2005-10-23 19:57:11 +00:00
|
|
|
the hardware directly. Use this if your machine
|
|
|
|
has a non-standard PCI host bridge.
|
2007-07-31 07:37:59 +00:00
|
|
|
nobios [X86-32] disallow use of PCI BIOS, only direct
|
2005-10-23 19:57:11 +00:00
|
|
|
hardware access methods are allowed. Use this
|
|
|
|
if you experience crashes upon bootup and you
|
|
|
|
suspect they are caused by the BIOS.
|
2007-07-31 07:37:59 +00:00
|
|
|
conf1 [X86-32] Force use of PCI Configuration
|
2005-10-23 19:57:11 +00:00
|
|
|
Mechanism 1.
|
2007-07-31 07:37:59 +00:00
|
|
|
conf2 [X86-32] Force use of PCI Configuration
|
2005-10-23 19:57:11 +00:00
|
|
|
Mechanism 2.
|
2007-10-05 20:17:58 +00:00
|
|
|
noaer [PCIE] If the PCIEAER kernel config parameter is
|
|
|
|
enabled, this kernel boot option can be used to
|
|
|
|
disable the use of PCIE advanced error reporting.
|
2007-10-11 20:57:27 +00:00
|
|
|
nodomains [PCI] Disable support for multiple PCI
|
|
|
|
root domains (aka PCI segments, in ACPI-speak).
|
2007-07-31 07:37:59 +00:00
|
|
|
nommconf [X86-32,X86_64] Disable use of MMCONFIG for PCI
|
2006-02-15 23:17:43 +00:00
|
|
|
Configuration
|
2006-03-06 05:33:34 +00:00
|
|
|
nomsi [MSI] If the PCI_MSI kernel config parameter is
|
|
|
|
enabled, this kernel boot option can be used to
|
|
|
|
disable the use of MSI interrupts system-wide.
|
2007-07-31 07:37:59 +00:00
|
|
|
nosort [X86-32] Don't sort PCI devices according to
|
2005-10-23 19:57:11 +00:00
|
|
|
order given by the PCI BIOS. This sorting is
|
|
|
|
done to get a device order compatible with
|
|
|
|
older kernels.
|
2007-07-31 07:37:59 +00:00
|
|
|
biosirq [X86-32] Use PCI BIOS calls to get the interrupt
|
2005-10-23 19:57:11 +00:00
|
|
|
routing table. These calls are known to be buggy
|
|
|
|
on several machines and they hang the machine
|
|
|
|
when used, but on other computers it's the only
|
|
|
|
way to get the interrupt routing table. Try
|
|
|
|
this option if the kernel is unable to allocate
|
|
|
|
IRQs or discover secondary PCI buses on your
|
|
|
|
motherboard.
|
2007-07-31 07:37:59 +00:00
|
|
|
rom [X86-32] Assign address space to expansion ROMs.
|
2005-10-23 19:57:11 +00:00
|
|
|
Use with caution as certain devices share
|
|
|
|
address decoders between ROMs and other
|
|
|
|
resources.
|
2007-07-31 07:37:59 +00:00
|
|
|
irqmask=0xMMMM [X86-32] Set a bit mask of IRQs allowed to be
|
2005-10-23 19:57:11 +00:00
|
|
|
assigned automatically to PCI devices. You can
|
|
|
|
make the kernel exclude IRQs of your ISA cards
|
|
|
|
this way.
|
2007-07-31 07:37:59 +00:00
|
|
|
pirqaddr=0xAAAAA [X86-32] Specify the physical address
|
2005-10-23 19:57:11 +00:00
|
|
|
of the PIRQ table (normally generated
|
|
|
|
by the BIOS) if it is outside the
|
|
|
|
F0000h-100000h range.
|
2007-07-31 07:37:59 +00:00
|
|
|
lastbus=N [X86-32] Scan all buses thru bus #N. Can be
|
2005-10-23 19:57:11 +00:00
|
|
|
useful if the kernel is unable to find your
|
|
|
|
secondary buses and you want to tell it
|
|
|
|
explicitly which ones they are.
|
2007-07-31 07:37:59 +00:00
|
|
|
assign-busses [X86-32] Always assign all PCI bus
|
2005-10-23 19:57:11 +00:00
|
|
|
numbers ourselves, overriding
|
|
|
|
whatever the firmware may have done.
|
2007-07-31 07:37:59 +00:00
|
|
|
usepirqmask [X86-32] Honor the possible IRQ mask stored
|
2005-10-23 19:57:11 +00:00
|
|
|
in the BIOS $PIR table. This is needed on
|
|
|
|
some systems with broken BIOSes, notably
|
|
|
|
some HP Pavilion N5400 and Omnibook XE3
|
|
|
|
notebooks. This will have no effect if ACPI
|
|
|
|
IRQ routing is enabled.
|
2007-07-31 07:37:59 +00:00
|
|
|
noacpi [X86-32] Do not use ACPI for IRQ routing
|
2005-10-23 19:57:11 +00:00
|
|
|
or for PCI scanning.
|
2007-10-03 22:56:51 +00:00
|
|
|
use_crs [X86-32] Use _CRS for PCI resource
|
|
|
|
allocation.
|
2005-10-23 19:57:11 +00:00
|
|
|
routeirq Do IRQ routing for all PCI devices.
|
|
|
|
This is normally done in pci_enable_device(),
|
|
|
|
so this option is a temporary workaround
|
|
|
|
for broken drivers that don't call it.
|
|
|
|
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.
|
2006-09-26 08:52:41 +00:00
|
|
|
noearly [X86] Don't do any early type 1 scanning.
|
|
|
|
This might help on some broken boards which
|
|
|
|
machine check when some devices' config space
|
|
|
|
is read. But various workarounds are disabled
|
|
|
|
and some IOMMU drivers will not work.
|
PCI: optionally sort device lists breadth-first
Problem:
New Dell PowerEdge servers have 2 embedded ethernet ports, which are
labeled NIC1 and NIC2 on the chassis, in the BIOS setup screens, and
in the printed documentation. Assuming no other add-in ethernet ports
in the system, Linux 2.4 kernels name these eth0 and eth1
respectively. Many people have come to expect this naming. Linux 2.6
kernels name these eth1 and eth0 respectively (backwards from
expectations). I also have reports that various Sun and HP servers
have similar behavior.
Root cause:
Linux 2.4 kernels walk the pci_devices list, which happens to be
sorted in breadth-first order (or pcbios_find_device order on i386,
which most often is breadth-first also). 2.6 kernels have both the
pci_devices list and the pci_bus_type.klist_devices list, the latter
is what is walked at driver load time to match the pci_id tables; this
klist happens to be in depth-first order.
On systems where, for physical routing reasons, NIC1 appears on a
lower bus number than NIC2, but NIC2's bridge is discovered first in
the depth-first ordering, NIC2 will be discovered before NIC1. If the
list were sorted breadth-first, NIC1 would be discovered before NIC2.
A PowerEdge 1955 system has the following topology which easily
exhibits the difference between depth-first and breadth-first device
lists.
-[0000:00]-+-00.0 Intel Corporation 5000P Chipset Memory Controller Hub
+-02.0-[0000:03-08]--+-00.0-[0000:04-07]--+-00.0-[0000:05-06]----00.0-[0000:06]----00.0 Broadcom Corporation NetXtreme II BCM5708S Gigabit Ethernet (labeled NIC2, 2.4 kernel name eth1, 2.6 kernel name eth0)
+-1c.0-[0000:01-02]----00.0-[0000:02]----00.0 Broadcom Corporation NetXtreme II BCM5708S Gigabit Ethernet (labeled NIC1, 2.4 kernel name eth0, 2.6 kernel name eth1)
Other factors, such as device driver load order and the presence of
PCI slots at various points in the bus hierarchy further complicate
this problem; I'm not trying to solve those here, just restore the
device order, and thus basic behavior, that 2.4 kernels had.
Solution:
The solution can come in multiple steps.
Suggested fix #1: kernel
Patch below optionally sorts the two device lists into breadth-first
ordering to maintain compatibility with 2.4 kernels. It adds two new
command line options:
pci=bfsort
pci=nobfsort
to force the sort order, or not, as you wish. It also adds DMI checks
for the specific Dell systems which exhibit "backwards" ordering, to
make them "right".
Suggested fix #2: udev rules from userland
Many people also have the expectation that embedded NICs are always
discovered before add-in NICs (which this patch does not try to do).
Using the PCI IRQ Routing Table provided by system BIOS, it's easy to
determine which PCI devices are embedded, or if add-in, which PCI slot
they're in. I'm working on a tool that would allow udev to name
ethernet devices in ascending embedded, slot 1 .. slot N order,
subsort by PCI bus/dev/fn breadth-first. It'll be possible to use it
independent of udev as well for those distributions that don't use
udev in their installers.
Suggested fix #3: system board routing rules
One can constrain the system board layout to put NIC1 ahead of NIC2
regardless of breadth-first or depth-first discovery order. This adds
a significant level of complexity to board routing, and may not be
possible in all instances (witness the above systems from several
major manufacturers). I don't want to encourage this particular train
of thought too far, at the expense of not doing #1 or #2 above.
Feedback appreciated. Patch tested on a Dell PowerEdge 1955 blade
with 2.6.18.
You'll also note I took some liberty and temporarily break the klist
abstraction to simplify and speed up the sort algorithm. I think
that's both safe and appropriate in this instance.
Signed-off-by: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-29 20:23:23 +00:00
|
|
|
bfsort Sort PCI devices into breadth-first order.
|
|
|
|
This sorting is done to get a device
|
|
|
|
order compatible with older (<= 2.4) kernels.
|
|
|
|
nobfsort Don't sort PCI devices into breadth-first order.
|
2007-02-06 00:36:06 +00:00
|
|
|
cbiosize=nn[KMG] The fixed amount of bus space which is
|
|
|
|
reserved for the CardBus bridge's IO window.
|
|
|
|
The default value is 256 bytes.
|
|
|
|
cbmemsize=nn[KMG] The fixed amount of bus space which is
|
|
|
|
reserved for the CardBus bridge's memory
|
|
|
|
window. The default value is 64 megabytes.
|
PCI: optionally sort device lists breadth-first
Problem:
New Dell PowerEdge servers have 2 embedded ethernet ports, which are
labeled NIC1 and NIC2 on the chassis, in the BIOS setup screens, and
in the printed documentation. Assuming no other add-in ethernet ports
in the system, Linux 2.4 kernels name these eth0 and eth1
respectively. Many people have come to expect this naming. Linux 2.6
kernels name these eth1 and eth0 respectively (backwards from
expectations). I also have reports that various Sun and HP servers
have similar behavior.
Root cause:
Linux 2.4 kernels walk the pci_devices list, which happens to be
sorted in breadth-first order (or pcbios_find_device order on i386,
which most often is breadth-first also). 2.6 kernels have both the
pci_devices list and the pci_bus_type.klist_devices list, the latter
is what is walked at driver load time to match the pci_id tables; this
klist happens to be in depth-first order.
On systems where, for physical routing reasons, NIC1 appears on a
lower bus number than NIC2, but NIC2's bridge is discovered first in
the depth-first ordering, NIC2 will be discovered before NIC1. If the
list were sorted breadth-first, NIC1 would be discovered before NIC2.
A PowerEdge 1955 system has the following topology which easily
exhibits the difference between depth-first and breadth-first device
lists.
-[0000:00]-+-00.0 Intel Corporation 5000P Chipset Memory Controller Hub
+-02.0-[0000:03-08]--+-00.0-[0000:04-07]--+-00.0-[0000:05-06]----00.0-[0000:06]----00.0 Broadcom Corporation NetXtreme II BCM5708S Gigabit Ethernet (labeled NIC2, 2.4 kernel name eth1, 2.6 kernel name eth0)
+-1c.0-[0000:01-02]----00.0-[0000:02]----00.0 Broadcom Corporation NetXtreme II BCM5708S Gigabit Ethernet (labeled NIC1, 2.4 kernel name eth0, 2.6 kernel name eth1)
Other factors, such as device driver load order and the presence of
PCI slots at various points in the bus hierarchy further complicate
this problem; I'm not trying to solve those here, just restore the
device order, and thus basic behavior, that 2.4 kernels had.
Solution:
The solution can come in multiple steps.
Suggested fix #1: kernel
Patch below optionally sorts the two device lists into breadth-first
ordering to maintain compatibility with 2.4 kernels. It adds two new
command line options:
pci=bfsort
pci=nobfsort
to force the sort order, or not, as you wish. It also adds DMI checks
for the specific Dell systems which exhibit "backwards" ordering, to
make them "right".
Suggested fix #2: udev rules from userland
Many people also have the expectation that embedded NICs are always
discovered before add-in NICs (which this patch does not try to do).
Using the PCI IRQ Routing Table provided by system BIOS, it's easy to
determine which PCI devices are embedded, or if add-in, which PCI slot
they're in. I'm working on a tool that would allow udev to name
ethernet devices in ascending embedded, slot 1 .. slot N order,
subsort by PCI bus/dev/fn breadth-first. It'll be possible to use it
independent of udev as well for those distributions that don't use
udev in their installers.
Suggested fix #3: system board routing rules
One can constrain the system board layout to put NIC1 ahead of NIC2
regardless of breadth-first or depth-first discovery order. This adds
a significant level of complexity to board routing, and may not be
possible in all instances (witness the above systems from several
major manufacturers). I don't want to encourage this particular train
of thought too far, at the expense of not doing #1 or #2 above.
Feedback appreciated. Patch tested on a Dell PowerEdge 1955 blade
with 2.6.18.
You'll also note I took some liberty and temporarily break the klist
abstraction to simplify and speed up the sort algorithm. I think
that's both safe and appropriate in this instance.
Signed-off-by: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-29 20:23:23 +00:00
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2005-04-16 22:20:36 +00:00
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|
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pcmv= [HW,PCMCIA] BadgePAD 4
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|
pd. [PARIDE]
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|
See Documentation/paride.txt.
|
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|
pdcchassis= [PARISC,HW] Disable/Enable PDC Chassis Status codes at
|
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|
boot time.
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|
Format: { 0 | 1 }
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|
|
See arch/parisc/kernel/pdc_chassis.c
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pf. [PARIDE]
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See Documentation/paride.txt.
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pg. [PARIDE]
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|
See Documentation/paride.txt.
|
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pirq= [SMP,APIC] Manual mp-table setup
|
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|
See Documentation/i386/IO-APIC.txt.
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plip= [PPT,NET] Parallel port network link
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Format: { parport<nr> | timid | 0 }
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See also Documentation/parport.txt.
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pnpacpi= [ACPI]
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{ off }
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pnpbios= [ISAPNP]
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{ on | off | curr | res | no-curr | no-res }
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pnp_reserve_irq=
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[ISAPNP] Exclude IRQs for the autoconfiguration
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pnp_reserve_dma=
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[ISAPNP] Exclude DMAs for the autoconfiguration
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pnp_reserve_io= [ISAPNP] Exclude I/O ports for the autoconfiguration
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2005-10-23 19:57:11 +00:00
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Ranges are in pairs (I/O port base and size).
|
2005-04-16 22:20:36 +00:00
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pnp_reserve_mem=
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2005-10-23 19:57:11 +00:00
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[ISAPNP] Exclude memory regions for the
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autoconfiguration.
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2005-04-16 22:20:36 +00:00
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Ranges are in pairs (memory base and size).
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|
2007-07-16 06:40:10 +00:00
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print-fatal-signals=
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[KNL] debug: print fatal signals
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print-fatal-signals=1: print segfault info to
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the kernel console.
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default: off.
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2007-07-16 06:40:25 +00:00
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printk.time= Show timing data prefixed to each printk message line
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Format: <bool> (1/Y/y=enable, 0/N/n=disable)
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2005-04-16 22:20:36 +00:00
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profile= [KNL] Enable kernel profiling via /proc/profile
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2005-10-23 19:57:11 +00:00
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Format: [schedule,]<number>
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Param: "schedule" - profile schedule points.
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Param: <number> - step/bucket size as a power of 2 for
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statistical time based profiling.
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2007-10-24 16:23:50 +00:00
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Param: "sleep" - profile D-state sleeping (millisecs).
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Requires CONFIG_SCHEDSTATS
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2007-10-20 01:08:22 +00:00
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Param: "kvm" - profile VM exits.
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2005-04-16 22:20:36 +00:00
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2005-10-23 19:57:11 +00:00
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processor.max_cstate= [HW,ACPI]
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2005-04-16 22:20:36 +00:00
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|
Limit processor to maximum C-state
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max_cstate=9 overrides any DMI blacklist limit.
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|
2005-12-28 17:43:51 +00:00
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processor.nocst [HW,ACPI]
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Ignore the _CST method to determine C-states,
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instead using the legacy FADT method
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|
2005-04-16 22:20:36 +00:00
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prompt_ramdisk= [RAM] List of RAM disks to prompt for floppy disk
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before loading.
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See Documentation/ramdisk.txt.
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|
2005-10-23 19:57:11 +00:00
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psmouse.proto= [HW,MOUSE] Highest PS2 mouse protocol extension to
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|
probe for; one of (bare|imps|exps|lifebook|any).
|
2005-04-16 22:20:36 +00:00
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|
psmouse.rate= [HW,MOUSE] Set desired mouse report rate, in reports
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|
per second.
|
2005-10-23 19:57:11 +00:00
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|
psmouse.resetafter= [HW,MOUSE]
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|
|
Try to reset the device after so many bad packets
|
2005-04-16 22:20:36 +00:00
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(0 = never).
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psmouse.resolution=
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|
[HW,MOUSE] Set desired mouse resolution, in dpi.
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|
psmouse.smartscroll=
|
2005-10-23 19:57:11 +00:00
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|
[HW,MOUSE] Controls Logitech smartscroll autorepeat.
|
2005-04-16 22:20:36 +00:00
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0 = disabled, 1 = enabled (default).
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pss= [HW,OSS] Personal Sound System (ECHO ESC614)
|
2005-10-23 19:57:11 +00:00
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|
Format:
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|
<io>,<mss_io>,<mss_irq>,<mss_dma>,<mpu_io>,<mpu_irq>
|
2005-04-16 22:20:36 +00:00
|
|
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|
pt. [PARIDE]
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|
|
See Documentation/paride.txt.
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|
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|
|
2007-08-15 10:25:38 +00:00
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|
pty.legacy_count=
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|
[KNL] Number of legacy pty's. Overwrites compiled-in
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default number.
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|
2006-09-29 09:01:02 +00:00
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|
quiet [KNL] Disable most log messages
|
2005-10-23 19:57:11 +00:00
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|
2005-04-16 22:20:36 +00:00
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r128= [HW,DRM]
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raid= [HW,RAID]
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See Documentation/md.txt.
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|
2005-10-23 19:57:11 +00:00
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|
ramdisk_blocksize= [RAM]
|
2005-04-16 22:20:36 +00:00
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|
|
See Documentation/ramdisk.txt.
|
2005-10-23 19:57:11 +00:00
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|
2005-04-16 22:20:36 +00:00
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|
|
ramdisk_size= [RAM] Sizes of RAM disks in kilobytes
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|
See Documentation/ramdisk.txt.
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|
2006-03-08 05:55:33 +00:00
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rcu.blimit= [KNL,BOOT] Set maximum number of finished
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|
|
RCU callbacks to process in one batch.
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|
rcu.qhimark= [KNL,BOOT] Set threshold of queued
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|
|
RCU callbacks over which batch limiting is disabled.
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|
rcu.qlowmark= [KNL,BOOT] Set threshold of queued
|
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|
|
RCU callbacks below which batch limiting is re-enabled.
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|
2005-09-06 22:17:19 +00:00
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|
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rdinit= [KNL]
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|
|
Format: <full_path>
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|
|
Run specified binary instead of /init from the ramdisk,
|
|
|
|
used for early userspace startup. See initrd.
|
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|
|
2007-07-31 07:37:59 +00:00
|
|
|
reboot= [BUGS=X86-32,BUGS=ARM,BUGS=IA-64] Rebooting mode
|
2005-04-16 22:20:36 +00:00
|
|
|
Format: <reboot_mode>[,<reboot_mode2>[,...]]
|
2007-09-15 10:38:47 +00:00
|
|
|
See arch/*/kernel/reboot.c or arch/*/kernel/process.c
|
2005-04-16 22:20:36 +00:00
|
|
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|
|
reserve= [KNL,BUGS] Force the kernel to ignore some iomem area
|
|
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|
|
2007-07-31 07:37:59 +00:00
|
|
|
reservetop= [X86-32]
|
2006-09-26 06:32:25 +00:00
|
|
|
Format: nn[KMG]
|
|
|
|
Reserves a hole at the top of the kernel virtual
|
|
|
|
address space.
|
|
|
|
|
2006-09-27 08:50:44 +00:00
|
|
|
reset_devices [KNL] Force drivers to reset the underlying device
|
|
|
|
during initialization.
|
|
|
|
|
2005-10-23 19:57:11 +00:00
|
|
|
resume= [SWSUSP]
|
|
|
|
Specify the partition device for software suspend
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-12-07 04:34:13 +00:00
|
|
|
resume_offset= [SWSUSP]
|
|
|
|
Specify the offset from the beginning of the partition
|
|
|
|
given by "resume=" at which the swap header is located,
|
|
|
|
in <PAGE_SIZE> units (needed only for swap files).
|
|
|
|
See Documentation/power/swsusp-and-swap-files.txt
|
|
|
|
|
2007-02-10 09:44:33 +00:00
|
|
|
retain_initrd [RAM] Keep initrd memory after extraction
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
rhash_entries= [KNL,NET]
|
|
|
|
Set number of hash buckets for route cache
|
|
|
|
|
|
|
|
riscom8= [HW,SERIAL]
|
|
|
|
Format: <io_board1>[,<io_board2>[,...<io_boardN>]]
|
|
|
|
|
|
|
|
ro [KNL] Mount root device read-only on boot
|
|
|
|
|
|
|
|
root= [KNL] Root filesystem
|
|
|
|
|
|
|
|
rootdelay= [KNL] Delay (in seconds) to pause before attempting to
|
|
|
|
mount the root filesystem
|
|
|
|
|
|
|
|
rootflags= [KNL] Set root filesystem mount option string
|
|
|
|
|
|
|
|
rootfstype= [KNL] Set root filesystem type
|
|
|
|
|
2007-07-16 06:40:35 +00:00
|
|
|
rootwait [KNL] Wait (indefinitely) for root device to show up.
|
|
|
|
Useful for devices that are detected asynchronously
|
|
|
|
(e.g. USB and MMC devices).
|
|
|
|
|
2007-10-17 06:31:32 +00:00
|
|
|
root_plug.vendor_id=
|
|
|
|
[ROOTPLUG] Override the default vendor ID
|
|
|
|
|
|
|
|
root_plug.product_id=
|
|
|
|
[ROOTPLUG] Override the default product ID
|
|
|
|
|
|
|
|
root_plug.debug=
|
|
|
|
[ROOTPLUG] Enable debugging output
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
rw [KNL] Mount root device read-write on boot
|
|
|
|
|
|
|
|
S [KNL] Run init in single mode
|
|
|
|
|
|
|
|
sa1100ir [NET]
|
|
|
|
See drivers/net/irda/sa1100_ir.c.
|
|
|
|
|
|
|
|
sbni= [NET] Granch SBNI12 leased line adapter
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
sc1200wdt= [HW,WDT] SC1200 WDT (watchdog) driver
|
|
|
|
Format: <io>[,<timeout>[,<isapnp>]]
|
|
|
|
|
|
|
|
scsi_debug_*= [SCSI]
|
|
|
|
See drivers/scsi/scsi_debug.c.
|
|
|
|
|
|
|
|
scsi_default_dev_flags=
|
|
|
|
[SCSI] SCSI default device flags
|
|
|
|
Format: <integer>
|
|
|
|
|
|
|
|
scsi_dev_flags= [SCSI] Black/white list entry for vendor and model
|
|
|
|
Format: <vendor>:<model>:<flags>
|
|
|
|
(flags are integer value)
|
|
|
|
|
2007-11-15 00:52:25 +00:00
|
|
|
scsi_logging_level= [SCSI] a bit mask of logging levels
|
|
|
|
See drivers/scsi/scsi_logging.h for bits. Also
|
|
|
|
settable via sysctl at dev.scsi.logging_level
|
|
|
|
(/proc/sys/dev/scsi/logging_level).
|
|
|
|
There is also a nice 'scsi_logging_level' script in the
|
|
|
|
S390-tools package, available for download at
|
|
|
|
http://www-128.ibm.com/developerworks/linux/linux390/s390-tools-1.5.4.html
|
2005-04-16 22:20:36 +00:00
|
|
|
|
2006-09-28 21:19:20 +00:00
|
|
|
scsi_mod.scan= [SCSI] sync (default) scans SCSI busses as they are
|
|
|
|
discovered. async scans them in kernel threads,
|
|
|
|
allowing boot to proceed. none ignores them, expecting
|
|
|
|
user space to do the scan.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
selinux [SELINUX] Disable or enable SELinux at boot time.
|
|
|
|
Format: { "0" | "1" }
|
|
|
|
See security/selinux/Kconfig help text.
|
|
|
|
0 -- disable.
|
|
|
|
1 -- enable.
|
|
|
|
Default value is set via kernel config option.
|
|
|
|
If enabled at boot time, /selinux/disable can be used
|
|
|
|
later to disable prior to initial policy load.
|
|
|
|
|
[SECMARK]: Add new packet controls to SELinux
Add new per-packet access controls to SELinux, replacing the old
packet controls.
Packets are labeled with the iptables SECMARK and CONNSECMARK targets,
then security policy for the packets is enforced with these controls.
To allow for a smooth transition to the new controls, the old code is
still present, but not active by default. To restore previous
behavior, the old controls may be activated at runtime by writing a
'1' to /selinux/compat_net, and also via the kernel boot parameter
selinux_compat_net. Switching between the network control models
requires the security load_policy permission. The old controls will
probably eventually be removed and any continued use is discouraged.
With this patch, the new secmark controls for SElinux are disabled by
default, so existing behavior is entirely preserved, and the user is
not affected at all.
It also provides a config option to enable the secmark controls by
default (which can always be overridden at boot and runtime). It is
also noted in the kconfig help that the user will need updated
userspace if enabling secmark controls for SELinux and that they'll
probably need the SECMARK and CONNMARK targets, and conntrack protocol
helpers, although such decisions are beyond the scope of kernel
configuration.
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-09 07:33:33 +00:00
|
|
|
selinux_compat_net =
|
|
|
|
[SELINUX] Set initial selinux_compat_net flag value.
|
2007-09-15 10:38:47 +00:00
|
|
|
Format: { "0" | "1" }
|
|
|
|
0 -- use new secmark-based packet controls
|
|
|
|
1 -- use legacy packet controls
|
|
|
|
Default value is 0 (preferred).
|
|
|
|
Value can be changed at runtime via
|
|
|
|
/selinux/compat_net.
|
[SECMARK]: Add new packet controls to SELinux
Add new per-packet access controls to SELinux, replacing the old
packet controls.
Packets are labeled with the iptables SECMARK and CONNSECMARK targets,
then security policy for the packets is enforced with these controls.
To allow for a smooth transition to the new controls, the old code is
still present, but not active by default. To restore previous
behavior, the old controls may be activated at runtime by writing a
'1' to /selinux/compat_net, and also via the kernel boot parameter
selinux_compat_net. Switching between the network control models
requires the security load_policy permission. The old controls will
probably eventually be removed and any continued use is discouraged.
With this patch, the new secmark controls for SElinux are disabled by
default, so existing behavior is entirely preserved, and the user is
not affected at all.
It also provides a config option to enable the secmark controls by
default (which can always be overridden at boot and runtime). It is
also noted in the kconfig help that the user will need updated
userspace if enabling secmark controls for SELinux and that they'll
probably need the SECMARK and CONNMARK targets, and conntrack protocol
helpers, although such decisions are beyond the scope of kernel
configuration.
Signed-off-by: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2006-06-09 07:33:33 +00:00
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
serialnumber [BUGS=X86-32]
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
shapers= [NET]
|
|
|
|
Maximal number of shapers.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
sim710= [SCSI,HW]
|
|
|
|
See header of drivers/scsi/sim710.c.
|
|
|
|
|
|
|
|
simeth= [IA-64]
|
|
|
|
simscsi=
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
slram= [HW,MTD]
|
|
|
|
|
2007-07-16 06:38:14 +00:00
|
|
|
slub_debug[=options[,slabs]] [MM, SLUB]
|
|
|
|
Enabling slub_debug allows one to determine the
|
|
|
|
culprit if slab objects become corrupted. Enabling
|
|
|
|
slub_debug can create guard zones around objects and
|
|
|
|
may poison objects when not in use. Also tracks the
|
|
|
|
last alloc / free. For more information see
|
|
|
|
Documentation/vm/slub.txt.
|
2007-05-31 07:40:47 +00:00
|
|
|
|
|
|
|
slub_max_order= [MM, SLUB]
|
2007-07-16 06:38:14 +00:00
|
|
|
Determines the maximum allowed order for slabs.
|
|
|
|
A high setting may cause OOMs due to memory
|
|
|
|
fragmentation. For more information see
|
|
|
|
Documentation/vm/slub.txt.
|
2007-05-31 07:40:47 +00:00
|
|
|
|
|
|
|
slub_min_objects= [MM, SLUB]
|
2007-07-16 06:38:14 +00:00
|
|
|
The minimum number of objects per slab. SLUB will
|
|
|
|
increase the slab order up to slub_max_order to
|
|
|
|
generate a sufficiently large slab able to contain
|
|
|
|
the number of objects indicated. The higher the number
|
|
|
|
of objects the smaller the overhead of tracking slabs
|
|
|
|
and the less frequently locks need to be acquired.
|
2007-05-31 07:40:47 +00:00
|
|
|
For more information see Documentation/vm/slub.txt.
|
|
|
|
|
|
|
|
slub_min_order= [MM, SLUB]
|
|
|
|
Determines the mininum page order for slabs. Must be
|
2007-07-16 06:38:14 +00:00
|
|
|
lower than slub_max_order.
|
2007-05-31 07:40:47 +00:00
|
|
|
For more information see Documentation/vm/slub.txt.
|
|
|
|
|
|
|
|
slub_nomerge [MM, SLUB]
|
2007-07-16 06:38:14 +00:00
|
|
|
Disable merging of slabs with similar size. May be
|
2007-05-31 07:40:47 +00:00
|
|
|
necessary if there is some reason to distinguish
|
2007-07-16 06:38:14 +00:00
|
|
|
allocs to different slabs. Debug options disable
|
|
|
|
merging on their own.
|
2007-05-31 07:40:47 +00:00
|
|
|
For more information see Documentation/vm/slub.txt.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
smart2= [HW]
|
|
|
|
Format: <io1>[,<io2>[,...,<io8>]]
|
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
smp-alt-once [X86-32,SMP] On a hotplug CPU system, only
|
2007-05-02 17:27:13 +00:00
|
|
|
attempt to substitute SMP alternatives once at boot.
|
|
|
|
|
2007-05-08 07:36:05 +00:00
|
|
|
smsc-ircc2.nopnp [HW] Don't use PNP to discover SMC devices
|
|
|
|
smsc-ircc2.ircc_cfg= [HW] Device configuration I/O port
|
|
|
|
smsc-ircc2.ircc_sir= [HW] SIR base I/O port
|
|
|
|
smsc-ircc2.ircc_fir= [HW] FIR base I/O port
|
|
|
|
smsc-ircc2.ircc_irq= [HW] IRQ line
|
|
|
|
smsc-ircc2.ircc_dma= [HW] DMA channel
|
|
|
|
smsc-ircc2.ircc_transceiver= [HW] Transceiver type:
|
|
|
|
0: Toshiba Satellite 1800 (GP data pin select)
|
|
|
|
1: Fast pin select (default)
|
|
|
|
2: ATC IRMode
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
snd-ad1816a= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-ad1848= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-ali5451= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-als100= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-als4000= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-azt2320= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-cmi8330= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-cmipci= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-cs4231= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-cs4232= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-cs4236= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-cs4281= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-cs46xx= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-dt019x= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-dummy= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-emu10k1= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-ens1370= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-ens1371= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-es968= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-es1688= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-es18xx= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-es1938= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-es1968= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-fm801= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-gusclassic= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-gusextreme= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-gusmax= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-hdsp= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-ice1712= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-intel8x0= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-interwave= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-interwave-stb=
|
|
|
|
[HW,ALSA]
|
|
|
|
|
|
|
|
snd-korg1212= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-maestro3= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-mpu401= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-mtpav= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-nm256= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-opl3sa2= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-opti92x-ad1848=
|
|
|
|
[HW,ALSA]
|
|
|
|
|
|
|
|
snd-opti92x-cs4231=
|
|
|
|
[HW,ALSA]
|
|
|
|
|
|
|
|
snd-opti93x= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-pmac= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-rme32= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-rme96= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-rme9652= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-sb8= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-sb16= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-sbawe= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-serial= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-sgalaxy= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-sonicvibes= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-sun-amd7930=
|
|
|
|
[HW,ALSA]
|
|
|
|
|
|
|
|
snd-sun-cs4231= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-trident= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-usb-audio= [HW,ALSA,USB]
|
|
|
|
|
|
|
|
snd-via82xx= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-virmidi= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-wavefront= [HW,ALSA]
|
|
|
|
|
|
|
|
snd-ymfpci= [HW,ALSA]
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
sonypi.*= [HW] Sony Programmable I/O Control Device driver
|
|
|
|
See Documentation/sonypi.txt
|
|
|
|
|
|
|
|
specialix= [HW,SERIAL] Specialix multi-serial port adapter
|
|
|
|
See Documentation/specialix.txt.
|
|
|
|
|
|
|
|
spia_io_base= [HW,MTD]
|
|
|
|
spia_fio_base=
|
|
|
|
spia_pedr=
|
|
|
|
spia_peddr=
|
|
|
|
|
|
|
|
sscape= [HW,OSS]
|
|
|
|
Format: <io>,<irq>,<dma>,<mpu_io>,<mpu_irq>
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
st= [HW,SCSI] SCSI tape parameters (buffers, etc.)
|
|
|
|
See Documentation/scsi/st.txt.
|
|
|
|
|
|
|
|
st0x= [HW,SCSI]
|
|
|
|
See header of drivers/scsi/seagate.c.
|
|
|
|
|
|
|
|
sti= [PARISC,HW]
|
|
|
|
Format: <num>
|
|
|
|
Set the STI (builtin display/keyboard on the HP-PARISC
|
|
|
|
machines) console (graphic card) which should be used
|
|
|
|
as the initial boot-console.
|
|
|
|
See also comment in drivers/video/console/sticore.c.
|
|
|
|
|
|
|
|
sti_font= [HW]
|
|
|
|
See comment in drivers/video/console/sticore.c.
|
|
|
|
|
|
|
|
stifb= [HW]
|
|
|
|
Format: bpp:<bpp1>[:<bpp2>[:<bpp3>...]]
|
|
|
|
|
2007-03-06 09:42:23 +00:00
|
|
|
sunrpc.pool_mode=
|
|
|
|
[NFS]
|
|
|
|
Control how the NFS server code allocates CPUs to
|
|
|
|
service thread pools. Depending on how many NICs
|
|
|
|
you have and where their interrupts are bound, this
|
|
|
|
option will affect which CPUs will do NFS serving.
|
|
|
|
Note: this parameter cannot be changed while the
|
|
|
|
NFS server is running.
|
|
|
|
|
|
|
|
auto the server chooses an appropriate mode
|
|
|
|
automatically using heuristics
|
|
|
|
global a single global pool contains all CPUs
|
|
|
|
percpu one pool for each CPU
|
|
|
|
pernode one pool for each NUMA node (equivalent
|
|
|
|
to global on non-NUMA machines)
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
swiotlb= [IA-64] Number of I/O TLB slabs
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
switches= [HW,M68k]
|
|
|
|
|
|
|
|
sym53c416= [HW,SCSI]
|
|
|
|
See header of drivers/scsi/sym53c416.c.
|
|
|
|
|
2006-12-13 08:34:36 +00:00
|
|
|
sysrq_always_enabled
|
|
|
|
[KNL]
|
|
|
|
Ignore sysrq setting - this boot parameter will
|
|
|
|
neutralize any effect of /proc/sys/kernel/sysrq.
|
|
|
|
Useful for debugging.
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
t128= [HW,SCSI]
|
|
|
|
See header of drivers/scsi/t128.c.
|
|
|
|
|
|
|
|
tdfx= [HW,DRM]
|
|
|
|
|
|
|
|
thash_entries= [KNL,NET]
|
|
|
|
Set number of hash buckets for TCP connection
|
|
|
|
|
2007-08-12 04:12:54 +00:00
|
|
|
thermal.act= [HW,ACPI]
|
|
|
|
-1: disable all active trip points in all thermal zones
|
|
|
|
<degrees C>: override all lowest active trip points
|
|
|
|
|
2007-08-14 19:49:32 +00:00
|
|
|
thermal.crt= [HW,ACPI]
|
|
|
|
-1: disable all critical trip points in all thermal zones
|
|
|
|
<degrees C>: lower all critical trip points
|
|
|
|
|
2007-08-12 04:12:44 +00:00
|
|
|
thermal.nocrt= [HW,ACPI]
|
|
|
|
Set to disable actions on ACPI thermal zone
|
|
|
|
critical and hot trip points.
|
|
|
|
|
2007-08-12 04:12:17 +00:00
|
|
|
thermal.off= [HW,ACPI]
|
|
|
|
1: disable ACPI thermal control
|
|
|
|
|
2007-08-12 04:12:35 +00:00
|
|
|
thermal.psv= [HW,ACPI]
|
|
|
|
-1: disable all passive trip points
|
|
|
|
<degrees C>: override all passive trip points to this value
|
|
|
|
|
ACPI: thermal: expose "thermal.tzp=" to set global polling frequency
Thermal Zone Polling frequency (_TZP) is an optional ACPI object
recommending the rate that the OS should poll the associated thermal zone.
If _TZP is 0, no polling should be used.
If _TZP is non-zero, then the platform recommends that
the OS poll the thermal zone at the specified rate.
The minimum period is 30 seconds.
The maximum period is 5 minutes.
(note _TZP and thermal.tzp units are in deci-seconds,
so _TZP = 300 corresponds to 30 seconds)
If _TZP is not present, ACPI 3.0b recommends that the
thermal zone be polled at an "OS provided default frequency".
However, common industry practice is:
1. The BIOS never specifies any _TZP
2. High volume OS's from this century never poll any thermal zones
Ie. The OS depends on the platform's ability to
provoke thermal events when necessary, and
the "OS provided default frequency" is "never":-)
There is a proposal that ACPI 4.0 be updated to reflect
common industry practice -- ie. no _TZP, no polling.
The Linux kernel already follows this practice --
thermal zones are not polled unless _TZP is present and non-zero.
But thermal zone polling is useful as a workaround for systems
which have ACPI thermal control, but have an issue preventing
thermal events. Indeed, some Linux distributions still
set a non-zero thermal polling frequency for this reason.
But rather than ask the user to write a polling frequency
into all the /proc/acpi/thermal_zone/*/polling_frequency
files, here we simply document and expose the already
existing module parameter to do the same at system level,
to simplify debugging those broken platforms.
Note that thermal.tzp is a module-load time parameter only.
Signed-off-by: Len Brown <len.brown@intel.com>
2007-08-12 04:12:26 +00:00
|
|
|
thermal.tzp= [HW,ACPI]
|
|
|
|
Specify global default ACPI thermal zone polling rate
|
|
|
|
<deci-seconds>: poll all this frequency
|
|
|
|
0: no polling (default)
|
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
time Show timing data prefixed to each printk message line
|
2007-07-16 06:40:25 +00:00
|
|
|
[deprecated, see 'printk.time']
|
2005-04-16 22:20:36 +00:00
|
|
|
|
|
|
|
tipar.timeout= [HW,PPT]
|
|
|
|
Set communications timeout in tenths of a second
|
|
|
|
(default 15).
|
|
|
|
|
|
|
|
tipar.delay= [HW,PPT]
|
|
|
|
Set inter-bit delay in microseconds (default 10).
|
|
|
|
|
|
|
|
tmc8xx= [HW,SCSI]
|
|
|
|
See header of drivers/scsi/seagate.c.
|
|
|
|
|
|
|
|
tmscsim= [HW,SCSI]
|
|
|
|
See comment before function dc390_setup() in
|
|
|
|
drivers/scsi/tmscsim.c.
|
|
|
|
|
|
|
|
tp720= [HW,PS2]
|
|
|
|
|
|
|
|
trix= [HW,OSS] MediaTrix AudioTrix Pro
|
2005-10-23 19:57:11 +00:00
|
|
|
Format:
|
|
|
|
<io>,<irq>,<dma>,<dma2>,<sb_io>,<sb_irq>,<sb_dma>,<mpu_io>,<mpu_irq>
|
|
|
|
|
|
|
|
turbografx.map[2|3]= [HW,JOY]
|
|
|
|
TurboGraFX parallel port interface
|
|
|
|
Format:
|
|
|
|
<port#>,<js1>,<js2>,<js3>,<js4>,<js5>,<js6>,<js7>
|
2005-04-16 22:20:36 +00:00
|
|
|
See also Documentation/input/joystick-parport.txt
|
|
|
|
|
|
|
|
u14-34f= [HW,SCSI] UltraStor 14F/34F SCSI host adapter
|
|
|
|
See header of drivers/scsi/u14-34f.c.
|
|
|
|
|
|
|
|
uart401= [HW,OSS]
|
|
|
|
Format: <io>,<irq>
|
|
|
|
|
|
|
|
uart6850= [HW,OSS]
|
|
|
|
Format: <io>,<irq>
|
|
|
|
|
2006-12-05 21:29:55 +00:00
|
|
|
uhci-hcd.ignore_oc=
|
|
|
|
[USB] Ignore overcurrent events (default N).
|
|
|
|
Some badly-designed motherboards generate lots of
|
|
|
|
bogus events, for ports that aren't wired to
|
|
|
|
anything. Set this parameter to avoid log spamming.
|
|
|
|
Note that genuine overcurrent events won't be
|
|
|
|
reported either.
|
|
|
|
|
2007-02-20 20:00:53 +00:00
|
|
|
usbcore.autosuspend=
|
|
|
|
[USB] The autosuspend time delay (in seconds) used
|
|
|
|
for newly-detected USB devices (default 2). This
|
|
|
|
is the time required before an idle device will be
|
|
|
|
autosuspended. Devices for which the delay is set
|
2007-03-13 20:39:15 +00:00
|
|
|
to a negative value won't be autosuspended at all.
|
2007-02-20 20:00:53 +00:00
|
|
|
|
2005-04-16 22:20:36 +00:00
|
|
|
usbhid.mousepoll=
|
|
|
|
[USBHID] The interval which mice are to be polled at.
|
2005-10-23 19:57:11 +00:00
|
|
|
|
2007-07-31 07:37:59 +00:00
|
|
|
vdso= [X86-32,SH,x86-64]
|
2007-05-02 17:27:12 +00:00
|
|
|
vdso=2: enable compat VDSO (default with COMPAT_VDSO)
|
[PATCH] vdso: randomize the i386 vDSO by moving it into a vma
Move the i386 VDSO down into a vma and thus randomize it.
Besides the security implications, this feature also helps debuggers, which
can COW a vma-backed VDSO just like a normal DSO and can thus do
single-stepping and other debugging features.
It's good for hypervisors (Xen, VMWare) too, which typically live in the same
high-mapped address space as the VDSO, hence whenever the VDSO is used, they
get lots of guest pagefaults and have to fix such guest accesses up - which
slows things down instead of speeding things up (the primary purpose of the
VDSO).
There's a new CONFIG_COMPAT_VDSO (default=y) option, which provides support
for older glibcs that still rely on a prelinked high-mapped VDSO. Newer
distributions (using glibc 2.3.3 or later) can turn this option off. Turning
it off is also recommended for security reasons: attackers cannot use the
predictable high-mapped VDSO page as syscall trampoline anymore.
There is a new vdso=[0|1] boot option as well, and a runtime
/proc/sys/vm/vdso_enabled sysctl switch, that allows the VDSO to be turned
on/off.
(This version of the VDSO-randomization patch also has working ELF
coredumping, the previous patch crashed in the coredumping code.)
This code is a combined work of the exec-shield VDSO randomization
code and Gerd Hoffmann's hypervisor-centric VDSO patch. Rusty Russell
started this patch and i completed it.
[akpm@osdl.org: cleanups]
[akpm@osdl.org: compile fix]
[akpm@osdl.org: compile fix 2]
[akpm@osdl.org: compile fix 3]
[akpm@osdl.org: revernt MAXMEM change]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Cc: Gerd Hoffmann <kraxel@suse.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Zachary Amsden <zach@vmware.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-27 09:53:50 +00:00
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vdso=1: enable VDSO (default)
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vdso=0: disable VDSO mapping
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2007-07-17 12:22:55 +00:00
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vector= [IA-64,SMP]
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vector=percpu: enable percpu vector domain
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2005-04-16 22:20:36 +00:00
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video= [FB] Frame buffer configuration
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See Documentation/fb/modedb.txt.
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2007-07-31 07:37:59 +00:00
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vga= [BOOT,X86-32] Select a particular video mode
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2005-10-23 19:57:11 +00:00
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See Documentation/i386/boot.txt and
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Documentation/svga.txt.
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2005-04-16 22:20:36 +00:00
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Use vga=ask for menu.
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This is actually a boot loader parameter; the value is
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passed to the kernel using a special protocol.
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2005-10-23 19:57:11 +00:00
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vmalloc=nn[KMG] [KNL,BOOT] Forces the vmalloc area to have an exact
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2005-04-16 22:20:36 +00:00
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size of <nn>. This can be used to increase the
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minimum size (128MB on x86). It can also be used to
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decrease the size and leave more room for directly
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mapped kernel RAM.
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2006-06-29 13:08:25 +00:00
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vmhalt= [KNL,S390] Perform z/VM CP command after system halt.
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Format: <command>
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2005-04-16 22:20:36 +00:00
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2006-06-29 13:08:25 +00:00
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vmpanic= [KNL,S390] Perform z/VM CP command after kernel panic.
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Format: <command>
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vmpoff= [KNL,S390] Perform z/VM CP command after power off.
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Format: <command>
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2005-10-23 19:57:11 +00:00
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2005-04-16 22:20:36 +00:00
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waveartist= [HW,OSS]
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Format: <io>,<irq>,<dma>,<dma2>
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2005-10-23 19:57:11 +00:00
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2005-04-16 22:20:36 +00:00
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wd33c93= [HW,SCSI]
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See header of drivers/scsi/wd33c93.c.
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wd7000= [HW,SCSI]
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See header of drivers/scsi/wd7000.c.
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wdt= [WDT] Watchdog
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2007-08-10 20:01:00 +00:00
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See Documentation/watchdog/wdt.txt.
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2005-04-16 22:20:36 +00:00
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xd= [HW,XT] Original XT pre-IDE (RLL encoded) disks.
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xd_geo= See header of drivers/block/xd.c.
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xirc2ps_cs= [NET,PCMCIA]
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2005-10-23 19:57:11 +00:00
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Format:
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<irq>,<irq_mask>,<io>,<full_duplex>,<do_sound>,<lockup_hack>[,<irq2>[,<irq3>[,<irq4>]]]
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2005-04-16 22:20:36 +00:00
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2006-02-16 22:41:58 +00:00
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norandmaps Don't use address space randomization
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Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space
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2005-10-23 19:57:11 +00:00
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______________________________________________________________________
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2005-04-16 22:20:36 +00:00
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TODO:
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Add documentation for ALSA options.
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Add more DRM drivers.
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