Documentation/kernel-parameters.txt: update 'isolcpus' kernel option

[linux-2.6-omap-h63xx.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 53ba7c7d82b342d50053f6458225b29123bee747..8a8cb0ccc5f4e2c7515a00cb861882f88771c85a 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -100,7 +100,7 @@ parameter is applicable:
        X86-32  X86-32, aka i386 architecture is enabled.
        X86-64  X86-64 architecture is enabled.
                        More X86-64 boot options can be found in
        X86-32  X86-32, aka i386 architecture is enabled.
        X86-64  X86-64 architecture is enabled.
                        More X86-64 boot options can be found in

-                       Documentation/x86_64/boot-options.txt .
+                       Documentation/x86/x86_64/boot-options.txt .

        X86     Either 32bit or 64bit x86 (same as X86-32+X86-64)
 
 In addition, the following text indicates that the option:
        X86     Either 32bit or 64bit x86 (same as X86-32+X86-64)
 
 In addition, the following text indicates that the option:


@@ -112,10 +112,10 @@ In addition, the following text indicates that the option:
 Parameters denoted with BOOT are actually interpreted by the boot
 loader, and have no meaning to the kernel directly.
 Do not modify the syntax of boot loader parameters without extreme
 Parameters denoted with BOOT are actually interpreted by the boot
 loader, and have no meaning to the kernel directly.
 Do not modify the syntax of boot loader parameters without extreme

-need or coordination with <Documentation/i386/boot.txt>.
+need or coordination with <Documentation/x86/i386/boot.txt>.

 
 There are also arch-specific kernel-parameters not documented here.
 
 There are also arch-specific kernel-parameters not documented here.

-See for example <Documentation/x86_64/boot-options.txt>.
+See for example <Documentation/x86/x86_64/boot-options.txt>.

 
 Note that ALL kernel parameters listed below are CASE SENSITIVE, and that
 a trailing = on the name of any parameter states that that parameter will
 
 Note that ALL kernel parameters listed below are CASE SENSITIVE, and that
 a trailing = on the name of any parameter states that that parameter will


@@ -218,20 +218,47 @@ and is between 256 and 4096 characters. It is defined in the file
        acpi.debug_level=       [HW,ACPI]
                        Format: <int>
                        Each bit of the <int> indicates an ACPI debug level,
        acpi.debug_level=       [HW,ACPI]
                        Format: <int>
                        Each bit of the <int> indicates an ACPI debug level,

-                       1: enable, 0: disable. It is useful for boot time
-                       debugging. After system has booted up, it can be set
-                       via /sys/module/acpi/parameters/debug_level.
-                       CONFIG_ACPI_DEBUG must be enabled for this to produce any output.
-                       Available bits (add the numbers together) to enable different
-                       debug output levels of the ACPI subsystem:
-                       0x01 error 0x02 warn 0x04 init 0x08 debug object
-                       0x10 info 0x20 init names 0x40 parse 0x80 load
-                       0x100 dispatch 0x200 execute 0x400 names 0x800 operation region
-                       0x1000 bfield 0x2000 tables 0x4000 values 0x8000 objects
-                       0x10000 resources 0x20000 user requests 0x40000 package.
-                       The number can be in decimal or prefixed with 0x in hex.
-                       Warning: Many of these options can produce a lot of
-                       output and make your system unusable. Be very careful.
+                       which corresponds to the level in an ACPI_DEBUG_PRINT
+                       statement.  After system has booted up, this mask
+                       can be set via /sys/module/acpi/parameters/debug_level.
+
+                       CONFIG_ACPI_DEBUG must be enabled for this to produce
+                       any output.  The number can be in decimal or prefixed
+                       with 0x in hex.  Some of these options produce so much
+                       output that the system is unusable.
+
+                       The following global components are defined by the
+                       ACPI CA:
+                              0x01 error
+                              0x02 warn
+                              0x04 init
+                              0x08 debug object
+                              0x10 info
+                              0x20 init names
+                              0x40 parse
+                              0x80 load
+                             0x100 dispatch
+                             0x200 execute
+                             0x400 names
+                             0x800 operation region
+                            0x1000 bfield
+                            0x2000 tables
+                            0x4000 values
+                            0x8000 objects
+                           0x10000 resources
+                           0x20000 user requests
+                           0x40000 package
+                       The number can be in decimal or prefixed with 0x in hex.
+                       Warning: Many of these options can produce a lot of
+                       output and make your system unusable. Be very careful.
+
+       acpi.power_nocheck=     [HW,ACPI]
+                       Format: 1/0 enable/disable the check of power state.
+                       On some bogus BIOS the _PSC object/_STA object of
+                       power resource can't return the correct device power
+                       state. In such case it is unneccessary to check its
+                       power state again in power transition.
+                       1 : disable the power state check

 
        acpi_pm_good    [X86-32,X86-64]
                        Override the pmtimer bug detection: force the kernel
 
        acpi_pm_good    [X86-32,X86-64]
                        Override the pmtimer bug detection: force the kernel


@@ -968,13 +995,15 @@ and is between 256 and 4096 characters. It is defined in the file
                        Format:
                        <cpu number>,...,<cpu number>
                        or
                        Format:
                        <cpu number>,...,<cpu number>
                        or

-                       <cpu number>-<cpu number>  (must be a positive range in ascending order)
+                       <cpu number>-<cpu number>
+                       (must be a positive range in ascending order)

                        or a mixture
                        <cpu number>,...,<cpu number>-<cpu number>
                        or a mixture
                        <cpu number>,...,<cpu number>-<cpu number>

+

                        This option can be used to specify one or more CPUs
                        to isolate from the general SMP balancing and scheduling
                        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.
+                       algorithms. You can move a process onto or off an
+                       "isolated" CPU via the CPU affinity syscalls or cpuset.

                        <cpu number> begins at 0 and the maximum value is
                        "number of CPUs in system - 1".
 
                        <cpu number> begins at 0 and the maximum value is
                        "number of CPUs in system - 1".
 


@@ -1195,7 +1224,7 @@ and is between 256 and 4096 characters. It is defined in the file
 
        mce             [X86-32] Machine Check Exception
 
 
        mce             [X86-32] Machine Check Exception
 

-       mce=option      [X86-64] See Documentation/x86_64/boot-options.txt
+       mce=option      [X86-64] See Documentation/x86/x86_64/boot-options.txt

 
        md=             [HW] RAID subsystems devices and level
                        See Documentation/md.txt.
 
        md=             [HW] RAID subsystems devices and level
                        See Documentation/md.txt.


@@ -1701,7 +1730,7 @@ and is between 256 and 4096 characters. It is defined in the file
                        See Documentation/paride.txt.
 
        pirq=           [SMP,APIC] Manual mp-table setup
                        See Documentation/paride.txt.
 
        pirq=           [SMP,APIC] Manual mp-table setup

-                       See Documentation/i386/IO-APIC.txt.
+                       See Documentation/x86/i386/IO-APIC.txt.

 
        plip=           [PPT,NET] Parallel port network link
                        Format: { parport<nr> | timid | 0 }
 
        plip=           [PPT,NET] Parallel port network link
                        Format: { parport<nr> | timid | 0 }


@@ -1711,6 +1740,10 @@ and is between 256 and 4096 characters. It is defined in the file
                        Override pmtimer IOPort with a hex value.
                        e.g. pmtmr=0x508
 
                        Override pmtimer IOPort with a hex value.
                        e.g. pmtmr=0x508
 

+       pnp.debug       [PNP]
+                       Enable PNP debug messages.  This depends on the
+                       CONFIG_PNP_DEBUG_MESSAGES option.
+

        pnpacpi=        [ACPI]
                        { off }
 
        pnpacpi=        [ACPI]
                        { off }
 


@@ -2208,7 +2241,7 @@ and is between 256 and 4096 characters. It is defined in the file
 
        thermal.crt=    [HW,ACPI]
                        -1: disable all critical trip points in all thermal zones
 
        thermal.crt=    [HW,ACPI]
                        -1: disable all critical trip points in all thermal zones

-                       <degrees C>: lower all critical trip points
+                       <degrees C>: override all critical trip points

 
        thermal.nocrt=  [HW,ACPI]
                        Set to disable actions on ACPI thermal zone
 
        thermal.nocrt=  [HW,ACPI]
                        Set to disable actions on ACPI thermal zone


@@ -2312,7 +2345,7 @@ and is between 256 and 4096 characters. It is defined in the file
                        See Documentation/fb/modedb.txt.
 
        vga=            [BOOT,X86-32] Select a particular video mode
                        See Documentation/fb/modedb.txt.
 
        vga=            [BOOT,X86-32] Select a particular video mode

-                       See Documentation/i386/boot.txt and
+                       See Documentation/x86/i386/boot.txt and

                        Documentation/svga.txt.
                        Use vga=ask for menu.
                        This is actually a boot loader parameter; the value is
                        Documentation/svga.txt.
                        Use vga=ask for menu.
                        This is actually a boot loader parameter; the value is