Merge branch 'for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup

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

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 591048ed13653a19dd0eb362525892faf38537bc..0315407f5f57b2d5c43facd1619a0a73935777e1 100644 (file)
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -113,7 +113,7 @@
                        the GPE dispatcher.
                        This facility can be used to prevent such uncontrolled
                        GPE floodings.
-                       Format: <byte>
+                       Format: <byte> or <bitmap-list>
 
        acpi_no_auto_serialize  [HW,ACPI]
                        Disable auto-serialization of AML methods
@@ -497,16 +497,21 @@
        ccw_timeout_log [S390]
                        See Documentation/s390/common_io.rst for details.
 
-       cgroup_disable= [KNL] Disable a particular controller
-                       Format: {name of the controller(s) to disable}
+       cgroup_disable= [KNL] Disable a particular controller or optional feature
+                       Format: {name of the controller(s) or feature(s) to disable}
                        The effects of cgroup_disable=foo are:
                        - foo isn't auto-mounted if you mount all cgroups in
                          a single hierarchy
                        - foo isn't visible as an individually mountable
                          subsystem
+                       - if foo is an optional feature then the feature is
+                         disabled and corresponding cgroup files are not
+                         created
                        {Currently only "memory" controller deal with this and
                        cut the overhead, others just disable the usage. So
                        only cgroup_disable=memory is actually worthy}
+                       Specifying "pressure" disables per-cgroup pressure
+                       stall information accounting feature
 
        cgroup_no_v1=   [KNL] Disable cgroup controllers and named hierarchies in v1
                        Format: { { controller | "all" | "named" }
@@ -3266,7 +3271,7 @@
 
        noclflush       [BUGS=X86] Don't use the CLFLUSH instruction
 
-       nodelayacct     [KNL] Disable per-task delay accounting
+       delayacct       [KNL] Enable per-task delay accounting
 
        nodsp           [SH] Disable hardware DSP at boot time.
 
@@ -3535,6 +3540,9 @@
 
        nr_uarts=       [SERIAL] maximum number of UARTs to be registered.
 
+       numa=off        [KNL, ARM64, PPC, RISCV, SPARC, X86] Disable NUMA, Only
+                       set up a single NUMA node spanning all memory.
+
        numa_balancing= [KNL,ARM64,PPC,RISCV,S390,X86] Enable or disable automatic
                        NUMA balancing.
                        Allowed values are enable and disable
@@ -3588,6 +3596,12 @@
                        off: turn off poisoning (default)
                        on: turn on poisoning
 
+       page_reporting.page_reporting_order=
+                       [KNL] Minimal page reporting order
+                       Format: <integer>
+                       Adjust the minimal page reporting order. The page
+                       reporting is disabled when it exceeds (MAX_ORDER-1).
+
        panic=          [KNL] Kernel behaviour on panic: delay <timeout>
                        timeout > 0: seconds before rebooting
                        timeout = 0: wait forever
@@ -4797,11 +4811,6 @@
                        Reserves a hole at the top of the kernel virtual
                        address space.
 
-       reservelow=     [X86]
-                       Format: nn[K]
-                       Set the amount of memory to reserve for BIOS at
-                       the bottom of the address space.
-
        reset_devices   [KNL] Force drivers to reset the underlying device
                        during initialization.
 
@@ -5305,6 +5314,14 @@
                                  exception. Default behavior is by #AC if
                                  both features are enabled in hardware.
 
+                       ratelimit:N -
+                                 Set system wide rate limit to N bus locks
+                                 per second for bus lock detection.
+                                 0 < N <= 1000.
+
+                                 N/A for split lock detection.
+
+
                        If an #AC exception is hit in the kernel or in
                        firmware (i.e. not while executing in user mode)
                        the kernel will oops in either "warn" or "fatal"