Merge branch 'for-linus' of git://oss.sgi.com:8090/xfs/xfs-2.6

[linux-2.6] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 975f029be25cb991e02ac9d310a15cd767ad2d29..586b6f85d4e035e55db1aef41ca010b346c846f9 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -1,5 +1,5 @@
-                          Kernel Parameters
-                          ~~~~~~~~~~~~~~~~~
+                         Kernel Parameters
+                         ~~~~~~~~~~~~~~~~~
 
 The following is a consolidated list of the kernel parameters as implemented
 (mostly) by the __setup() macro and sorted into English Dictionary order
@@ -468,9 +468,6 @@ and is between 256 and 4096 characters. It is defined in the file
                        Format:
                        <first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>]
 
-       cpia_pp=        [HW,PPT]
-                       Format: { parport<nr> | auto | none }
-
        crashkernel=nn[KMG]@ss[KMG]
                        [KNL] Reserve a chunk of physical memory to
                        hold a kernel to switch to with kexec on panic.
@@ -952,14 +949,10 @@ and is between 256 and 4096 characters. It is defined in the file
                        Format: <1-256>
 
        maxcpus=        [SMP] Maximum number of processors that an SMP kernel
-                       should make use of.
-                       Using "nosmp" or "maxcpus=0" will disable SMP
-                       entirely (the MPS table probe still happens, though).
-                       A command-line option of "maxcpus=<NUM>", where <NUM>
-                       is an integer greater than 0, limits the maximum number
-                       of CPUs activated in SMP mode to <NUM>.
-                       Using "maxcpus=1" on an SMP kernel is the trivial
-                       case of an SMP kernel with only one CPU.
+                       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.
 
        max_addr=[KMG]  [KNL,BOOT,ia64] All physical memory greater than or
                        equal to this physical address is ignored.
@@ -1184,7 +1177,8 @@ and is between 256 and 4096 characters. It is defined in the file
 
        nosep           [BUGS=X86-32] Disables x86 SYSENTER/SYSEXIT support.
 
-       nosmp           [SMP] Tells an SMP kernel to act as a UP kernel.
+       nosmp           [SMP] Tells an SMP kernel to act as a UP kernel,
+                       and disable the IO APIC.  legacy for "maxcpus=0".
 
        nosoftlockup    [KNL] Disable the soft-lockup detector.
 
@@ -1468,7 +1462,7 @@ and is between 256 and 4096 characters. It is defined in the file
 
        reboot=         [BUGS=X86-32,BUGS=ARM,BUGS=IA-64] Rebooting mode
                        Format: <reboot_mode>[,<reboot_mode2>[,...]]
-                       See arch/*/kernel/reboot.c or arch/*/kernel/process.c                   
+                       See arch/*/kernel/reboot.c or arch/*/kernel/process.c
 
        reserve=        [KNL,BUGS] Force the kernel to ignore some iomem area
 
@@ -1556,12 +1550,12 @@ and is between 256 and 4096 characters. It is defined in the file
 
        selinux_compat_net =
                        [SELINUX] Set initial selinux_compat_net flag value.
-                        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.
+                       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.
 
        serialnumber    [BUGS=X86-32]
 
@@ -1826,6 +1820,10 @@ and is between 256 and 4096 characters. It is defined in the file
                        -1: disable all active trip points in all thermal zones
                        <degrees C>: override all lowest active trip points
 
+       thermal.crt=    [HW,ACPI]
+                       -1: disable all critical trip points in all thermal zones
+                       <degrees C>: lower all critical trip points
+
        thermal.nocrt=  [HW,ACPI]
                        Set to disable actions on ACPI thermal zone
                        critical and hot trip points.
@@ -1956,7 +1954,7 @@ and is between 256 and 4096 characters. It is defined in the file
        norandmaps      Don't use address space randomization
                        Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space
 
-       unwind_debug=N  N > 0 will enable dwarf2 unwinder debugging
+       unwind_debug=N  N > 0 will enable dwarf2 unwinder debugging
                        This is useful to get more information why
                        you got a "dwarf2 unwinder stuck"