[S390] cpu topology: introduce kernel parameter

[sfrench/cifs-2.6.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 9fa6508892c287ce68e5449c894ae2fab2c7bbf9..09ede6c90ad71fda3057478ac699908668d4a678 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -220,14 +220,17 @@ and is between 256 and 4096 characters. It is defined in the file
                        Bits in debug_level correspond to a level in
                        ACPI_DEBUG_PRINT statements, e.g.,
                            ACPI_DEBUG_PRINT((ACPI_DB_INFO, ...
-                       See Documentation/acpi/debug.txt for more information
-                       about debug layers and levels.
+                       The debug_level mask defaults to "info".  See
+                       Documentation/acpi/debug.txt for more information about
+                       debug layers and levels.
 
+                       Enable processor driver info messages:
+                           acpi.debug_layer=0x20000000
+                       Enable PCI/PCI interrupt routing info messages:
+                           acpi.debug_layer=0x400000
                        Enable AML "Debug" output, i.e., stores to the Debug
                        object while interpreting AML:
                            acpi.debug_layer=0xffffffff acpi.debug_level=0x2
-                       Enable PCI/PCI interrupt routing info messages:
-                           acpi.debug_layer=0x400000 acpi.debug_level=0x4
                        Enable all messages related to ACPI hardware:
                            acpi.debug_layer=0x2 acpi.debug_level=0xffffffff
 
@@ -294,7 +297,9 @@ and is between 256 and 4096 characters. It is defined in the file
                        Possible values are:
                        isolate - enable device isolation (each device, as far
                                  as possible, will get its own protection
-                                 domain)
+                                 domain) [default]
+                       share - put every device behind one IOMMU into the
+                               same protection domain
                        fullflush - enable flushing of IO/TLB entries when
                                    they are unmapped. Otherwise they are
                                    flushed before they will be reused, which
@@ -1193,8 +1198,8 @@ and is between 256 and 4096 characters. It is defined in the file
                        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.
+       max_addr=nn[KMG]        [KNL,BOOT,ia64] All physical memory greater than
+                       or equal to this physical address is ignored.
 
        max_luns=       [SCSI] Maximum number of LUNs to probe.
                        Should be between 1 and 2^32-1.
@@ -1294,6 +1299,9 @@ and is between 256 and 4096 characters. It is defined in the file
 
        mga=            [HW,DRM]
 
+       min_addr=nn[KMG]        [KNL,BOOT,ia64] All physical memory below this
+                       physical address is ignored.
+
        mminit_loglevel=
                        [KNL] When CONFIG_DEBUG_MEMORY_INIT is set, this
                        parameter allows control of the logging verbosity for
@@ -2244,6 +2252,14 @@ and is between 256 and 4096 characters. It is defined in the file
                        See comment before function dc390_setup() in
                        drivers/scsi/tmscsim.c.
 
+       topology=       [S390]
+                       Format: {off | on}
+                       Specify if the kernel should make use of the cpu
+                       topology informations if the hardware supports these.
+                       The scheduler will make use of these informations and
+                       e.g. base its process migration decisions on it.
+                       Default is off.
+
        tp720=          [HW,PS2]
 
        trix=           [HW,OSS] MediaTrix AudioTrix Pro