Merge master.kernel.org:/pub/scm/linux/kernel/git/paulus/powerpc
[sfrench/cifs-2.6.git] / Documentation / kernel-parameters.txt
index 255ec535bba803699f4608fc99b05810582b5c14..15e4fed127f69bd3200d2a8ae1e59832570def7e 100644 (file)
@@ -110,6 +110,13 @@ be entered as an environment variable, whereas its absence indicates that
 it will appear as a kernel argument readable via /proc/cmdline by programs
 running once the system is up.
 
+The number of kernel parameters is not limited, but the length of the
+complete command line (parameters including spaces etc.) is limited to
+a fixed number of characters. This limit depends on the architecture
+and is between 256 and 4096 characters. It is defined in the file
+./include/asm/setup.h as COMMAND_LINE_SIZE.
+
+
        53c7xx=         [HW,SCSI] Amiga SCSI controllers
                        See header of drivers/scsi/53c7xx.c.
                        See also Documentation/scsi/ncr53c7xx.txt.
@@ -157,6 +164,10 @@ running once the system is up.
        acpi_skip_timer_override [HW,ACPI]
                        Recognize and ignore IRQ0/pin2 Interrupt Override.
                        For broken nForce2 BIOS resulting in XT-PIC timer.
+       acpi_use_timer_override [HW,ACPI}
+                       Use timer override. For some broken Nvidia NF5 boards
+                       that require a timer override, but don't have
+                       HPET
 
        acpi_dbg_layer= [HW,ACPI]
                        Format: <int>
@@ -282,9 +293,6 @@ running once the system is up.
 
        autotest        [IA64]
 
-       awe=            [HW,OSS] AWE32/SB32/AWE64 wave table synth
-                       Format: <io>,<memsize>,<isapnp>
-
        aztcd=          [HW,CD] Aztech CD268 CDROM driver
                        Format: <io>,0x79 (?)
 
@@ -348,9 +356,9 @@ running once the system is up.
 
        clock=          [BUGS=IA-32, HW] gettimeofday clocksource override.
                        [Deprecated]
-                       Forces specified clocksource (if avaliable) to be used
+                       Forces specified clocksource (if available) to be used
                        when calculating gettimeofday(). If specified
-                       clocksource is not avalible, it defaults to PIT.
+                       clocksource is not available, it defaults to PIT.
                        Format: { pit | tsc | cyclone | pmtmr }
 
        disable_8254_timer
@@ -529,10 +537,6 @@ running once the system is up.
                        Default value is 0.
                        Value can be changed at runtime via /selinux/enforce.
 
-       es1370=         [HW,OSS]
-                       Format: <lineout>[,<micbias>]
-                       See also header of sound/oss/es1370.c.
-
        es1371=         [HW,OSS]
                        Format: <spdif>,[<nomix>,[<amplifier>]]
                        See also header of sound/oss/es1371.c.
@@ -553,9 +557,6 @@ running once the system is up.
        floppy=         [HW]
                        See Documentation/floppy.txt.
 
-       ftape=          [HW] Floppy Tape subsystem debugging options.
-                       See Documentation/ftape.txt.
-
        gamecon.map[2|3]=
                        [HW,JOY] Multisystem joystick and NES/SNES/PSX pad
                        support via parallel port (up to 5 devices per port)
@@ -573,9 +574,6 @@ running once the system is up.
        gscd=           [HW,CD]
                        Format: <io>
 
-       gus=            [HW,OSS]
-                       Format: <io>,<irq>,<dma>,<dma16>
-
        gvp11=          [HW,SCSI]
 
        hashdist=       [KNL,NUMA] Large hashes allocated during boot
@@ -604,8 +602,8 @@ running once the system is up.
        noirqbalance    [IA-32,SMP,KNL] Disable kernel irq balancing
 
        i8042.direct    [HW] Put keyboard port into non-translated mode
-       i8042.dumbkbd   [HW] Pretend that controlled can only read data from
-                            keyboard and can not control its state
+       i8042.dumbkbd   [HW] Pretend that controller can only read data from
+                            keyboard and cannot control its state
                             (Don't attempt to blink the leds)
        i8042.noaux     [HW] Don't check for auxiliary (== mouse) port
        i8042.nokbd     [HW] Don't check/create keyboard port
@@ -834,12 +832,6 @@ running once the system is up.
                        (machvec) in a generic kernel.
                        Example: machvec=hpzx1_swiotlb
 
-       mad16=          [HW,OSS] Format:
-                       <io>,<irq>,<dma>,<dma16>,<mpu_io>,<mpu_irq>,<joystick>
-
-       maui=           [HW,OSS]
-                       Format: <io>,<irq>
-
        max_loop=       [LOOP] Maximum number of loopback devices that can
                        be mounted
                        Format: <1-256>
@@ -1107,9 +1099,6 @@ running once the system is up.
        opl3=           [HW,OSS]
                        Format: <io>
 
-       opl3sa=         [HW,OSS]
-                       Format: <io>,<irq>,<dma>,<dma2>,<mpu_io>,<mpu_irq>
-
        opl3sa2=        [HW,OSS] Format:
                        <io>,<irq>,<dma>,<dma2>,<mss_io>,<mpu_io>,<ymode>,<loopback>[,<isapnp>,<multiple]
 
@@ -1243,6 +1232,11 @@ running once the system is up.
                                machine check when some devices' config space
                                is read. But various workarounds are disabled
                                and some IOMMU drivers will not work.
+               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.
+
        pcmv=           [HW,PCMCIA] BadgePAD 4
 
        pd.             [PARIDE]
@@ -1324,7 +1318,7 @@ running once the system is up.
        pt.             [PARIDE]
                        See Documentation/paride.txt.
 
-       quiet=          [KNL] Disable log messages
+       quiet           [KNL] Disable most log messages
 
        r128=           [HW,DRM]
 
@@ -1350,10 +1344,6 @@ running once the system is up.
        rcu.qlowmark=   [KNL,BOOT] Set threshold of queued
                        RCU callbacks below which batch limiting is re-enabled.
 
-       rcu.rsinterval= [KNL,BOOT,SMP] Set the number of additional
-                       RCU callbacks to queued before forcing reschedule
-                       on all cpus.
-
        rdinit=         [KNL]
                        Format: <full_path>
                        Run specified binary instead of /init from the ramdisk,
@@ -1361,7 +1351,7 @@ running once the system is up.
 
        reboot=         [BUGS=IA-32,BUGS=ARM,BUGS=IA-64] Rebooting mode
                        Format: <reboot_mode>[,<reboot_mode2>[,...]]
-                       See arch/*/kernel/reboot.c.
+                       See arch/*/kernel/reboot.c or arch/*/kernel/process.c                   
 
        reserve=        [KNL,BUGS] Force the kernel to ignore some iomem area
 
@@ -1370,6 +1360,9 @@ running once the system is up.
                        Reserves a hole at the top of the kernel virtual
                        address space.
 
+       reset_devices   [KNL] Force drivers to reset the underlying device
+                       during initialization.
+
        resume=         [SWSUSP]
                        Specify the partition device for software suspend
 
@@ -1445,9 +1438,6 @@ running once the system is up.
 
        sg_def_reserved_size=   [SCSI]
 
-       sgalaxy=        [HW,OSS]
-                       Format: <io>,<irq>,<dma>,<dma2>,<sgbase>
-
        shapers=        [NET]
                        Maximal number of shapers.
 
@@ -1588,9 +1578,6 @@ running once the system is up.
 
        snd-ymfpci=     [HW,ALSA]
 
-       sonicvibes=     [HW,OSS]
-                       Format: <reverb>
-
        sonycd535=      [HW,CD]
                        Format: <io>[,<irq>]