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 705fb91..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"
 
 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
 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.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
 
        i8042.unlock    [HW] Unlock (ignore) the keylock
        i8042.kbdreset  [HW] Reset device connected to KBD port
 


@@ -1789,13 +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
                        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
 
        irqfixup        [HW]
                        When an interrupt is not handled search all handlers


@@ -1812,13 +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: <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
 
                        This option can be used to specify one or more CPUs
                        to isolate from the general SMP balancing and scheduling


@@ -2451,6 +2477,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
        nfsrootdebug    [NFS] enable nfsroot debugging messages.
                        See Documentation/filesystems/nfs/nfsroot.txt.
 
        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.
        nfs.callback_tcpport=
                        [NFS] set the TCP port on which the NFSv4 callback
                        channel should listen.


@@ -2474,6 +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.
 
                        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.
        nfs.max_session_slots=
                        [NFSv4.1] Sets the maximum number of session slots
                        the client will attempt to negotiate with the server.


@@ -2680,6 +2718,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        Default: on
 
        nohz_full=      [KNL,BOOT]
                        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
                        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


@@ -3285,6 +3324,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        See Documentation/blockdev/ramdisk.txt.
 
        rcu_nocbs=      [KNL]
                        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
                        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