Fix timerfd breakage on avr32

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

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index c4178778e7fd01d65b99b2279aecad0727701770..9ad4e6fc56fdb7a880e5276ea5f9b0c1d780778e 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -34,6 +34,7 @@ parameter is applicable:
        ALSA    ALSA sound support is enabled.
        APIC    APIC support is enabled.
        APM     Advanced Power Management support is enabled.
        ALSA    ALSA sound support is enabled.
        APIC    APIC support is enabled.
        APM     Advanced Power Management support is enabled.

+       AVR32   AVR32 architecture is enabled.

        AX25    Appropriate AX.25 support is enabled.
        BLACKFIN Blackfin architecture is enabled.
        DRM     Direct Rendering Management support is enabled.
        AX25    Appropriate AX.25 support is enabled.
        BLACKFIN Blackfin architecture is enabled.
        DRM     Direct Rendering Management support is enabled.


@@ -167,6 +168,11 @@ and is between 256 and 4096 characters. It is defined in the file
        acpi_irq_isa=   [HW,ACPI] If irq_balance, mark listed IRQs used by ISA
                        Format: <irq>,<irq>...
 
        acpi_irq_isa=   [HW,ACPI] If irq_balance, mark listed IRQs used by ISA
                        Format: <irq>,<irq>...
 

+       acpi_new_pts_ordering [HW,ACPI]
+                       Enforce the ACPI 2.0 ordering of the _PTS control
+                       method wrt putting devices into low power states
+                       default: pre ACPI 2.0 ordering of _PTS
+

        acpi_no_auto_ssdt       [HW,ACPI] Disable automatic loading of SSDT
 
        acpi_os_name=   [HW,ACPI] Tell ACPI BIOS the name of the OS
        acpi_no_auto_ssdt       [HW,ACPI] Disable automatic loading of SSDT
 
        acpi_os_name=   [HW,ACPI] Tell ACPI BIOS the name of the OS


@@ -369,7 +375,8 @@ and is between 256 and 4096 characters. It is defined in the file
                        configured.  Potentially dangerous and should only be
                        used if you are entirely sure of the consequences.
 
                        configured.  Potentially dangerous and should only be
                        used if you are entirely sure of the consequences.
 

-       chandev=        [HW,NET] Generic channel device initialisation
+       ccw_timeout_log [S390]
+                       See Documentation/s390/CommonIO for details.

 
        checkreqprot    [SELINUX] Set initial checkreqprot flag value.
                        Format: { "0" | "1" }
 
        checkreqprot    [SELINUX] Set initial checkreqprot flag value.
                        Format: { "0" | "1" }


@@ -381,6 +388,12 @@ and is between 256 and 4096 characters. It is defined in the file
                        Value can be changed at runtime via
                                /selinux/checkreqprot.
 
                        Value can be changed at runtime via
                                /selinux/checkreqprot.
 

+       cio_ignore=     [S390]
+                       See Documentation/s390/CommonIO for details.
+
+       cio_msg=        [S390]
+                       See Documentation/s390/CommonIO for details.
+

        clock=          [BUGS=X86-32, HW] gettimeofday clocksource override.
                        [Deprecated]
                        Forces specified clocksource (if available) to be used
        clock=          [BUGS=X86-32, HW] gettimeofday clocksource override.
                        [Deprecated]
                        Forces specified clocksource (if available) to be used


@@ -408,8 +421,21 @@ and is between 256 and 4096 characters. It is defined in the file
                        [SPARC64] tick
                        [X86-64] hpet,tsc
 
                        [SPARC64] tick
                        [X86-64] hpet,tsc
 

-       code_bytes      [IA32] How many bytes of object code to print in an
-                       oops report.
+       clearcpuid=BITNUM [X86]
+                       Disable CPUID feature X for the kernel. See
+                       include/asm-x86/cpufeature.h for the valid bit numbers.
+                       Note the Linux specific bits are not necessarily
+                       stable over kernel options, but the vendor specific
+                       ones should be.
+                       Also note that user programs calling CPUID directly
+                       or using the feature without checking anything
+                       will still see it. This just prevents it from
+                       being used by the kernel or shown in /proc/cpuinfo.
+                       Also note the kernel might malfunction if you disable
+                       some critical bits.
+
+       code_bytes      [IA32/X86_64] How many bytes of object code to print
+                       in an oops report.

                        Range: 0 - 8192
                        Default: 64
 
                        Range: 0 - 8192
                        Default: 64
 


@@ -523,7 +549,7 @@ and is between 256 and 4096 characters. It is defined in the file
                        1 will print _a lot_ more information - normally
                        only useful to kernel developers.
 
                        1 will print _a lot_ more information - normally
                        only useful to kernel developers.
 

-       decnet=         [HW,NET]
+       decnet.addr=    [HW,NET]

                        Format: <area>[,<node>]
                        See also Documentation/networking/decnet.txt.
 
                        Format: <area>[,<node>]
                        See also Documentation/networking/decnet.txt.
 


@@ -562,6 +588,12 @@ and is between 256 and 4096 characters. It is defined in the file
                        See drivers/char/README.epca and
                        Documentation/digiepca.txt.
 
                        See drivers/char/README.epca and
                        Documentation/digiepca.txt.
 

+       disable_mtrr_trim [X86, Intel and AMD only]
+                       By default the kernel will trim any uncacheable
+                       memory out of your available memory pool based on
+                       MTRR settings.  This parameter disables that behavior,
+                       possibly causing your machine to run very slowly.
+

        dmasound=       [HW,OSS] Sound subsystem buffers
 
        dscc4.setup=    [NET]
        dmasound=       [HW,OSS] Sound subsystem buffers
 
        dscc4.setup=    [NET]


@@ -652,6 +684,10 @@ and is between 256 and 4096 characters. It is defined in the file
 
        gamma=          [HW,DRM]
 
 
        gamma=          [HW,DRM]
 

+       gart_fix_e820=  [X86_64] disable the fix e820 for K8 GART
+                       Format: off | on
+                       default: on
+

        gdth=           [HW,SCSI]
                        See header of drivers/scsi/gdth.c.
 
        gdth=           [HW,SCSI]
                        See header of drivers/scsi/gdth.c.
 


@@ -686,6 +722,7 @@ and is between 256 and 4096 characters. It is defined in the file
                        See Documentation/isdn/README.HiSax.
 
        hugepages=      [HW,X86-32,IA-64] Maximal number of HugeTLB pages.
                        See Documentation/isdn/README.HiSax.
 
        hugepages=      [HW,X86-32,IA-64] Maximal number of HugeTLB pages.

+       hugepagesz=     [HW,IA-64,PPC] The size of the HugeTLB pages.

 
        i8042.direct    [HW] Put keyboard port into non-translated mode
        i8042.dumbkbd   [HW] Pretend that controller can only read data from
 
        i8042.direct    [HW] Put keyboard port into non-translated mode
        i8042.dumbkbd   [HW] Pretend that controller can only read data from


@@ -786,6 +823,16 @@ and is between 256 and 4096 characters. It is defined in the file
                        for translation below 32 bit and if not available
                        then look in the higher range.
 
                        for translation below 32 bit and if not available
                        then look in the higher range.
 

+       io_delay=       [X86-32,X86-64] I/O delay method
+               0x80
+                       Standard port 0x80 based delay
+               0xed
+                       Alternate port 0xed based delay (needed on some systems)
+               udelay
+                       Simple two microseconds delay
+               none
+                       No delay
+

        io7=            [HW] IO7 for Marvel based alpha systems
                        See comment before marvel_specify_io7 in
                        arch/alpha/kernel/core_marvel.c.
        io7=            [HW] IO7 for Marvel based alpha systems
                        See comment before marvel_specify_io7 in
                        arch/alpha/kernel/core_marvel.c.


@@ -1051,6 +1098,11 @@ and is between 256 and 4096 characters. It is defined in the file
                        Multi-Function General Purpose Timers on AMD Geode
                        platforms.
 
                        Multi-Function General Purpose Timers on AMD Geode
                        platforms.
 

+       mfgptfix        [X86-32] Fix MFGPT timers on AMD Geode platforms when
+                       the BIOS has incorrectly applied a workaround. TinyBIOS
+                       version 0.98 is known to be affected, 0.99 fixes the
+                       problem by letting the user disable the workaround.
+

        mga=            [HW,DRM]
 
        mousedev.tap_time=
        mga=            [HW,DRM]
 
        mousedev.tap_time=


@@ -1123,6 +1175,10 @@ and is between 256 and 4096 characters. It is defined in the file
                        of returning the full 64-bit number.
                        The default is to return 64-bit inode numbers.
 
                        of returning the full 64-bit number.
                        The default is to return 64-bit inode numbers.
 

+       nmi_debug=      [KNL,AVR32] Specify one or more actions to take
+                       when a NMI is triggered.
+                       Format: [state][,regs][,debounce][,die]
+

        nmi_watchdog=   [KNL,BUGS=X86-32] Debugging features for SMP kernels
 
        no387           [BUGS=X86-32] Tells the kernel to use the 387 maths
        nmi_watchdog=   [KNL,BUGS=X86-32] Debugging features for SMP kernels
 
        no387           [BUGS=X86-32] Tells the kernel to use the 387 maths


@@ -1147,6 +1203,8 @@ and is between 256 and 4096 characters. It is defined in the file
 
        nodisconnect    [HW,SCSI,M68K] Disables SCSI disconnects.
 
 
        nodisconnect    [HW,SCSI,M68K] Disables SCSI disconnects.
 

+       noefi           [X86-32,X86-64] Disable EFI runtime services support.
+

        noexec          [IA-64]
 
        noexec          [X86-32,X86-64]
        noexec          [IA-64]
 
        noexec          [X86-32,X86-64]


@@ -1157,6 +1215,8 @@ and is between 256 and 4096 characters. It is defined in the file
                        register save and restore. The kernel will only save
                        legacy floating-point registers on task switch.
 
                        register save and restore. The kernel will only save
                        legacy floating-point registers on task switch.
 

+       noclflush       [BUGS=X86] Don't use the CLFLUSH instruction
+

        nohlt           [BUGS=ARM]
 
        no-hlt          [BUGS=X86-32] Tells the kernel that the hlt
        nohlt           [BUGS=ARM]
 
        no-hlt          [BUGS=X86-32] Tells the kernel that the hlt


@@ -1501,14 +1561,17 @@ and is between 256 and 4096 characters. It is defined in the file
        ramdisk_size=   [RAM] Sizes of RAM disks in kilobytes
                        See Documentation/ramdisk.txt.
 
        ramdisk_size=   [RAM] Sizes of RAM disks in kilobytes
                        See Documentation/ramdisk.txt.
 

-       rcu.blimit=     [KNL,BOOT] Set maximum number of finished
-                       RCU callbacks to process in one batch.
+       rcupdate.blimit=        [KNL,BOOT]
+                       Set maximum number of finished RCU callbacks to process
+                       in one batch.

 
 

-       rcu.qhimark=    [KNL,BOOT] Set threshold of queued
+       rcupdate.qhimark=       [KNL,BOOT]
+                       Set threshold of queued

                        RCU callbacks over which batch limiting is disabled.
 
                        RCU callbacks over which batch limiting is disabled.
 

-       rcu.qlowmark=   [KNL,BOOT] Set threshold of queued
-                       RCU callbacks below which batch limiting is re-enabled.
+       rcupdate.qlowmark=      [KNL,BOOT]
+                       Set threshold of queued RCU callbacks below which
+                       batch limiting is re-enabled.

 
        rdinit=         [KNL]
                        Format: <full_path>
 
        rdinit=         [KNL]
                        Format: <full_path>


@@ -1593,7 +1656,13 @@ and is between 256 and 4096 characters. It is defined in the file
                        Format: <vendor>:<model>:<flags>
                        (flags are integer value)
 
                        Format: <vendor>:<model>:<flags>
                        (flags are integer value)
 

-       scsi_logging=   [SCSI]
+       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

 
        scsi_mod.scan=  [SCSI] sync (default) scans SCSI busses as they are
                        discovered.  async scans them in kernel threads,
 
        scsi_mod.scan=  [SCSI] sync (default) scans SCSI busses as they are
                        discovered.  async scans them in kernel threads,


@@ -1822,9 +1891,6 @@ and is between 256 and 4096 characters. It is defined in the file
        st=             [HW,SCSI] SCSI tape parameters (buffers, etc.)
                        See Documentation/scsi/st.txt.
 
        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
        sti=            [PARISC,HW]
                        Format: <num>
                        Set the STI (builtin display/keyboard on the HP-PARISC


@@ -1909,9 +1975,6 @@ and is between 256 and 4096 characters. It is defined in the file
        tipar.delay=    [HW,PPT]
                        Set inter-bit delay in microseconds (default 10).
 
        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.
        tmscsim=        [HW,SCSI]
                        See comment before function dc390_setup() in
                        drivers/scsi/tmscsim.c.


@@ -1960,6 +2023,11 @@ and is between 256 and 4096 characters. It is defined in the file
                        vdso=1: enable VDSO (default)
                        vdso=0: disable VDSO mapping
 
                        vdso=1: enable VDSO (default)
                        vdso=0: disable VDSO mapping
 

+       vdso32=         [X86-32,X86-64]
+                       vdso32=2: enable compat VDSO (default with COMPAT_VDSO)
+                       vdso32=1: enable 32-bit VDSO (default)
+                       vdso32=0: disable 32-bit VDSO mapping
+

        vector=         [IA-64,SMP]
                        vector=percpu: enable percpu vector domain
 
        vector=         [IA-64,SMP]
                        vector=percpu: enable percpu vector domain