much milder d_walk() race

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

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1b322c0..82b42c9 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -315,6 +315,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        acpi_osi=!*             # remove all strings
                        acpi_osi=!              # disable all built-in OS vendor
                                                  strings
+                       acpi_osi=!!             # enable all built-in OS vendor
+                                                 strings
                        acpi_osi=               # disable all strings
 
                        'acpi_osi=!' can be used in combination with single or
@@ -836,6 +838,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        It will be ignored when crashkernel=X,high is not used
                        or memory reserved is below 4G.
 
+       cryptomgr.notests
+                        [KNL] Disable crypto self-tests
+
        cs89x0_dma=     [HW,NET]
                        Format: <dma>
 
@@ -1049,6 +1054,12 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        the driver will use only 32-bit accessors to read/write
                        the device registers.
 
+               meson,<addr>
+                       Start an early, polled-mode console on a meson serial
+                       port at the specified address. The serial port must
+                       already be setup and configured. Options are not yet
+                       supported.
+
                msm_serial,<addr>
                        Start an early, polled-mode console on an msm serial
                        port at the specified address. The serial port
@@ -1782,6 +1793,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        PCI device 00:14.0 write the parameter as:
                                ivrs_hpet[0]=00:14.0
 
+       ivrs_acpihid    [HW,X86_64]
+                       Provide an override to the ACPI-HID:UID<->DEVICE-ID
+                       mapping provided in the IVRS ACPI table. For
+                       example, to map UART-HID:UID AMD0020:0 to
+                       PCI device 00:14.5 write the parameter as:
+                               ivrs_acpihid[00:14.5]=AMD0020:0
+
        js=             [HW,JOY] Analog joystick
                        See Documentation/input/joystick.txt.
 
@@ -2156,6 +2174,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        [KNL,SH] Allow user to override the default size for
                        per-device physically contiguous DMA buffers.
 
+        memhp_default_state=online/offline
+                       [KNL] Set the initial state for the memory hotplug
+                       onlining policy. If not specified, the default value is
+                       set according to the
+                       CONFIG_MEMORY_HOTPLUG_DEFAULT_ONLINE kernel config
+                       option.
+                       See Documentation/memory-hotplug.txt.
+
        memmap=exactmap [KNL,X86] Enable setting of an exact
                        E820 memory map, as specified by the user.
                        Such memmap=exactmap lines can be constructed based on
@@ -2553,6 +2579,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
 
        nohugeiomap     [KNL,x86] Disable kernel huge I/O mappings.
 
+       nosmt           [KNL,S390] Disable symmetric multithreading (SMT).
+                       Equivalent to smt=1.
+
        noxsave         [BUGS=X86] Disables x86 extended register state save
                        and restore using xsave. The kernel will fallback to
                        enabling legacy floating-point and sse state.
@@ -2936,11 +2965,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                                for broken drivers that don't call it.
                skip_isa_align  [X86] do not align io start addr, so can
                                handle more pci cards
-               firmware        [ARM] Do not re-enumerate the bus but instead
-                               just use the configuration from the
-                               bootloader. This is currently used on
-                               IXP2000 systems where the bus has to be
-                               configured a certain way for adjunct CPUs.
                noearly         [X86] Don't do any early type 1 scanning.
                                This might help on some broken boards which
                                machine check when some devices' config space
@@ -3748,6 +3772,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                                1: Fast pin select (default)
                                2: ATC IRMode
 
+       smt             [KNL,S390] Set the maximum number of threads (logical
+                       CPUs) to use per physical CPU on systems capable of
+                       symmetric multithreading (SMT). Will be capped to the
+                       actual hardware limit.
+                       Format: <integer>
+                       Default: -1 (no limit)
+
        softlockup_panic=
                        [KNL] Should the soft-lockup detector generate panics.
                        Format: <integer>