x86/smpboot: Init apic mapping before usage

[cascardo/linux.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index ec8d814..37babf9 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -33,6 +33,37 @@ can also be entered as
 Double-quotes can be used to protect spaces in values, e.g.:
        param="spaces in here"
 
+cpu lists:
+----------
+
+Some kernel parameters take a list of CPUs as a value, e.g.  isolcpus,
+nohz_full, irqaffinity, rcu_nocbs.  The format of this list is:
+
+       <cpu number>,...,<cpu number>
+
+or
+
+       <cpu number>-<cpu number>
+       (must be a positive range in ascending order)
+
+or a mixture
+
+<cpu number>,...,<cpu number>-<cpu number>
+
+Note that for the special case of a range one can split the range into equal
+sized groups and for each group use some amount from the beginning of that
+group:
+
+       <cpu number>-cpu number>:<used size>/<group size>
+
+For example one can add to the command line following parameter:
+
+       isolcpus=1,2,10-20,100-2000:2/25
+
+where the final item represents CPUs 100,101,125,126,150,151,...
+
+
+
 This document may not be entirely up to date and comprehensive. The command
 "modinfo -p ${modulename}" shows a current list of all parameters of a loadable
 module. Loadable modules, after being loaded into the running kernel, also
@@ -1480,7 +1511,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
        i8042.nopnp     [HW] Don't use ACPIPnP / PnPBIOS to discover KBD/AUX
                             controllers
        i8042.notimeout [HW] Ignore timeout condition signalled by controller
-       i8042.reset     [HW] Reset the controller during init and cleanup
+       i8042.reset     [HW] Reset the controller during init, cleanup and
+                            suspend-to-ram transitions, only during s2r
+                            transitions, or never reset
+                       Format: { 1 | Y | y | 0 | N | n }
+                       1, Y, y: always reset controller
+                       0, N, n: don't ever reset controller
+                       Default: only on s2r transitions on x86; most other
+                       architectures force reset to be always executed
        i8042.unlock    [HW] Unlock (ignore) the keylock
        i8042.kbdreset  [HW] Reset device connected to KBD port
 
@@ -1666,6 +1704,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
        initrd=         [BOOT] Specify the location of the initial ramdisk
 
+       init_pkru=      [x86] Specify the default memory protection keys rights
+                       register contents for all processes.  0x55555554 by
+                       default (disallow access to all but pkey 0).  Can
+                       override in debugfs after boot.
+
        inport.irq=     [HW] Inport (ATI XL and Microsoft) busmouse driver
                        Format: <irq>
 
@@ -1784,13 +1827,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        See Documentation/filesystems/nfs/nfsroot.txt.
 
        irqaffinity=    [SMP] Set the default irq affinity mask
-                       Format:
-                       <cpu number>,...,<cpu number>
-                       or
-                       <cpu number>-<cpu number>
-                       (must be a positive range in ascending order)
-                       or a mixture
-                       <cpu number>,...,<cpu number>-<cpu number>
+                       The argument is a cpu list, as described above.
 
        irqfixup        [HW]
                        When an interrupt is not handled search all handlers
@@ -1807,13 +1844,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        Format: <RDP>,<reset>,<pci_scan>,<verbosity>
 
        isolcpus=       [KNL,SMP] Isolate CPUs from the general scheduler.
-                       Format:
-                       <cpu number>,...,<cpu number>
-                       or
-                       <cpu number>-<cpu number>
-                       (must be a positive range in ascending order)
-                       or a mixture
-                       <cpu number>,...,<cpu number>-<cpu number>
+                       The argument is a cpu list, as described above.
 
                        This option can be used to specify one or more CPUs
                        to isolate from the general SMP balancing and scheduling
@@ -2446,6 +2477,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
        nfsrootdebug    [NFS] enable nfsroot debugging messages.
                        See Documentation/filesystems/nfs/nfsroot.txt.
 
+       nfs.callback_nr_threads=
+                       [NFSv4] set the total number of threads that the
+                       NFS client will assign to service NFSv4 callback
+                       requests.
+
        nfs.callback_tcpport=
                        [NFS] set the TCP port on which the NFSv4 callback
                        channel should listen.
@@ -2469,6 +2505,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        of returning the full 64-bit number.
                        The default is to return 64-bit inode numbers.
 
+       nfs.max_session_cb_slots=
+                       [NFSv4.1] Sets the maximum number of session
+                       slots the client will assign to the callback
+                       channel. This determines the maximum number of
+                       callbacks the client will process in parallel for
+                       a particular server.
+
        nfs.max_session_slots=
                        [NFSv4.1] Sets the maximum number of session slots
                        the client will attempt to negotiate with the server.
@@ -2675,6 +2718,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        Default: on
 
        nohz_full=      [KNL,BOOT]
+                       The argument is a cpu list, as described above.
                        In kernels built with CONFIG_NO_HZ_FULL=y, set
                        the specified list of CPUs whose tick will be stopped
                        whenever possible. The boot CPU will be forced outside
@@ -3280,6 +3324,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        See Documentation/blockdev/ramdisk.txt.
 
        rcu_nocbs=      [KNL]
+                       The argument is a cpu list, as described above.
+
                        In kernels built with CONFIG_RCU_NOCB_CPU=y, set
                        the specified list of CPUs to be no-callback CPUs.
                        Invocation of these CPUs' RCU callbacks will