1 files changed, 55 insertions, 14 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 31e3377d8e14..b29f3c416296 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -329,6 +329,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                                     is a lot of faster
                         off       - do not initialize any AMD IOMMU found in
                                     the system
+                        force_isolation - Force device isolation for all
+                                          devices. The IOMMU driver is not
+                                          allowed anymore to lift isolation
+                                          requirements as needed. This option
+                                          does not override iommu=pt
 
         amijoy.map=     [HW,JOY] Amiga joystick support
                         Map of devices attached to JOY0DAT and JOY1DAT
@@ -623,6 +628,25 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
         no_debug_objects
                         [KNL] Disable object debugging
 
+        debug_guardpage_minorder=
+                        [KNL] When CONFIG_DEBUG_PAGEALLOC is set, this
+                        parameter allows control of the order of pages that will
+                        be intentionally kept free (and hence protected) by the
+                        buddy allocator. Bigger value increase the probability
+                        of catching random memory corruption, but reduce the
+                        amount of memory for normal system use. The maximum
+                        possible value is MAX_ORDER/2.  Setting this parameter
+                        to 1 or 2 should be enough to identify most random
+                        memory corruption problems caused by bugs in kernel or
+                        driver code when a CPU writes to (or reads from) a
+                        random memory location. Note that there exists a class
+                        of memory corruptions problems caused by buggy H/W or
+                        F/W or by drivers badly programing DMA (basically when
+                        memory is written at bus level and the CPU MMU is
+                        bypassed) which are not detectable by
+                        CONFIG_DEBUG_PAGEALLOC, hence this option will not help
+                        tracking down these problems.
+
         debugpat        [X86] Enable PAT debugging
 
         decnet.addr=    [HW,NET]
@@ -1059,7 +1083,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                 nomerge
                 forcesac
                 soft
-                pt      [x86, IA-64]
+                pt              [x86, IA-64]
+                group_mf        [x86, IA-64]
+
 
         io7=            [HW] IO7 for Marvel based alpha systems
                         See comment before marvel_specify_io7 in
@@ -1178,9 +1204,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
         kvm.ignore_msrs=[KVM] Ignore guest accesses to unhandled MSRs.
                         Default is 0 (don't ignore, but inject #GP)
 
-        kvm.oos_shadow= [KVM] Disable out-of-sync shadow paging.
-                        Default is 1 (enabled)
-
         kvm.mmu_audit=  [KVM] This is a R/W parameter which allows audit
                         KVM MMU at runtime.
                         Default is 0 (off)
@@ -1630,12 +1653,17 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         The default is to return 64-bit inode numbers.
 
         nfs.nfs4_disable_idmapping=
-                        [NFSv4] When set, this option disables the NFSv4
-                        idmapper on the client, but only if the mount
-                        is using the 'sec=sys' security flavour. This may
-                        make migration from legacy NFSv2/v3 systems easier
-                        provided that the server has the appropriate support.
-                        The default is to always enable NFSv4 idmapping.
+                        [NFSv4] When set to the default of '1', this option
+                        ensures that both the RPC level authentication
+                        scheme and the NFS level operations agree to use
+                        numeric uids/gids if the mount is using the
+                        'sec=sys' security flavour. In effect it is
+                        disabling idmapping, which can make migration from
+                        legacy NFSv2/v3 systems to NFSv4 easier.
+                        Servers that do not support this mode of operation
+                        will be autodetected by the client, and it will fall
+                        back to using the idmapper.
+                        To turn off this behaviour, set the value to '0'.
 
         nmi_debug=      [KNL,AVR32,SH] Specify one or more actions to take
                         when a NMI is triggered.
@@ -1796,6 +1824,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
         nomfgpt         [X86-32] Disable Multi-Function General Purpose
                         Timer usage (for AMD Geode machines).
 
+        nonmi_ipi       [X86] Disable using NMI IPIs during panic/reboot to
+                        shutdown the other cpus.  Instead use the REBOOT_VECTOR
+                        irq.
+
         nopat           [X86] Disable PAT (page attribute table extension of
                         pagetables) support.
 
@@ -2367,6 +2399,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
         slram=          [HW,MTD]
 
+        slab_max_order= [MM, SLAB]
+                        Determines the maximum allowed order for slabs.
+                        A high setting may cause OOMs due to memory
+                        fragmentation.  Defaults to 1 for systems with
+                        more than 32MB of RAM, 0 otherwise.
+
         slub_debug[=options[,slabs]]    [MM, SLUB]
                         Enabling slub_debug allows one to determine the
                         culprit if slab objects become corrupted. Enabling
@@ -2645,6 +2683,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         [USB] Start with the old device initialization
                         scheme (default 0 = off).
 
+        usbcore.usbfs_memory_mb=
+                        [USB] Memory limit (in MB) for buffers allocated by
+                        usbfs (default = 16, 0 = max = 2047).
+
         usbcore.use_both_schemes=
                         [USB] Try the other device initialization scheme
                         if the first one fails (default 1 = enabled).
@@ -2763,11 +2805,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                         functions are at fixed addresses, they make nice
                         targets for exploits that can control RIP.
 
-                        emulate     Vsyscalls turn into traps and are emulated
-                                    reasonably safely.
+                        emulate     [default] Vsyscalls turn into traps and are
+                                    emulated reasonably safely.
 
-                        native      [default] Vsyscalls are native syscall
-                                    instructions.
+                        native      Vsyscalls are native syscall instructions.
                                     This is a little bit faster than trapping
                                     and makes a few dynamic recompilers work
                                     better than they would in emulation mode.