summaryrefslogtreecommitdiffstats
path: root/Documentation/admin-guide/kernel-parameters.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt56
1 files changed, 45 insertions, 11 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 21e2d8863705..986e44387dad 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -106,6 +106,16 @@
use by PCI
Format: <irq>,<irq>...
+ acpi_mask_gpe= [HW,ACPI]
+ Due to the existence of _Lxx/_Exx, some GPEs triggered
+ by unsupported hardware/firmware features can result in
+ GPE floodings that cannot be automatically disabled by
+ the GPE dispatcher.
+ This facility can be used to prevent such uncontrolled
+ GPE floodings.
+ Format: <int>
+ Support masking of GPEs numbered from 0x00 to 0x7f.
+
acpi_no_auto_serialize [HW,ACPI]
Disable auto-serialization of AML methods
AML control methods that contain the opcodes to create
@@ -539,15 +549,6 @@
loops can be debugged more effectively on production
systems.
- clocksource.arm_arch_timer.fsl-a008585=
- [ARM64]
- Format: <bool>
- Enable/disable the workaround of Freescale/NXP
- erratum A-008585. This can be useful for KVM
- guests, if the guest device tree doesn't show the
- erratum. If unspecified, the workaround is
- enabled based on the device tree.
-
clearcpuid=BITNUM [X86]
Disable CPUID feature X for the kernel. See
arch/x86/include/asm/cpufeatures.h for the valid bit
@@ -956,6 +957,12 @@
serial port must already be setup and configured.
Options are not yet supported.
+ lantiq,<addr>
+ Start an early, polled-mode console on a lantiq serial
+ (lqasc) port at the specified address. The serial port
+ must already be setup and configured. Options are not
+ yet supported.
+
lpuart,<addr>
lpuart32,<addr>
Use early console provided by Freescale LP UART driver
@@ -969,9 +976,10 @@
address. The serial port must already be setup
and configured. Options are not yet supported.
- earlyprintk= [X86,SH,BLACKFIN,ARM,M68k]
+ earlyprintk= [X86,SH,BLACKFIN,ARM,M68k,S390]
earlyprintk=vga
earlyprintk=efi
+ earlyprintk=sclp
earlyprintk=xen
earlyprintk=serial[,ttySn[,baudrate]]
earlyprintk=serial[,0x...[,baudrate]]
@@ -1006,6 +1014,8 @@
The xen output can only be used by Xen PV guests.
+ The sclp output can only be used on s390.
+
edac_report= [HW,EDAC] Control how to report EDAC event
Format: {"on" | "off" | "force"}
on: enable EDAC to report H/W event. May be overridden
@@ -1191,6 +1201,10 @@
When zero, profiling data is discarded and associated
debugfs files are removed at module unload time.
+ goldfish [X86] Enable the goldfish android emulator platform.
+ Don't use this when you are not running on the
+ android emulator
+
gpt [EFI] Forces disk with valid GPT signature but
invalid Protective MBR to be treated as GPT. If the
primary GPT is corrupted, it enables the backup/alternate
@@ -3268,6 +3282,13 @@
Lazy RCU callbacks are those which RCU can
prove do nothing more than free memory.
+ rcutree.rcu_kick_kthreads= [KNL]
+ Cause the grace-period kthread to get an extra
+ wake_up() if it sleeps three times longer than
+ it should at force-quiescent-state time.
+ This wake_up() will be accompanied by a
+ WARN_ONCE() splat and an ftrace_dump().
+
rcuperf.gp_exp= [KNL]
Measure performance of expedited synchronous
grace-period primitives.
@@ -3553,6 +3574,10 @@
rhash_entries= [KNL,NET]
Set number of hash buckets for route cache
+ ring3mwait=disable
+ [KNL] Disable ring 3 MONITOR/MWAIT feature on supported
+ CPUs.
+
ro [KNL] Mount root device read-only on boot
rodata= [KNL]
@@ -3669,6 +3694,14 @@
last alloc / free. For more information see
Documentation/vm/slub.txt.
+ slub_memcg_sysfs= [MM, SLUB]
+ Determines whether to enable sysfs directories for
+ memory cgroup sub-caches. 1 to enable, 0 to disable.
+ The default is determined by CONFIG_SLUB_MEMCG_SYSFS_ON.
+ Enabling this can lead to a very high number of debug
+ directories and files being created under
+ /sys/kernel/slub.
+
slub_max_order= [MM, SLUB]
Determines the maximum allowed order for slabs.
A high setting may cause OOMs due to memory
@@ -3811,10 +3844,11 @@
it if 0 is given (See Documentation/cgroup-v1/memory.txt)
swiotlb= [ARM,IA-64,PPC,MIPS,X86]
- Format: { <int> | force }
+ Format: { <int> | force | noforce }
<int> -- Number of I/O TLB slabs
force -- force using of bounce buffers even if they
wouldn't be automatically used by the kernel
+ noforce -- Never use bounce buffers (for debugging)
switches= [HW,M68k]