Commit a894a8a5 authored by Randy Dunlap's avatar Randy Dunlap Committed by Jonathan Corbet
Browse files

Documentation: kernel-parameters: sort all "no..." parameters 



Sort all of the "no..." kernel parameters into the correct order
as specified in kernel-parameters.rst: "into English Dictionary order
(defined as ignoring all punctuation and sorting digits before letters
in a case insensitive manner)".

No other changes here, just movement of lines.

Signed-off-by: default avatarRandy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/20230317002635.16540-1-rdunlap@infradead.org


Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent c1f8e848

Documentation/admin-guide/kernel-parameters.txt

+128 −128
Original line number Diff line number Diff line
@@ -929,9 +929,6 @@ 


	debug_objects	[KNL] Enable object debugging



	no_debug_objects

			[KNL] Disable object debugging



	debug_guardpage_minorder=

			[KNL] When CONFIG_DEBUG_PAGEALLOC is set, this

			parameter allows control of the order of pages that will
@@ -3579,7 +3576,21 @@ 
	no5lvl		[X86-64] Disable 5-level paging mode. Forces

			kernel to use 4-level paging instead.



	nofsgsbase	[X86] Disables FSGSBASE instructions.

	noaliencache	[MM, NUMA, SLAB] Disables the allocation of alien

			caches in the slab allocator.  Saves per-node memory,

			but will impact performance.



	noalign		[KNL,ARM]



	noaltinstr	[S390] Disables alternative instructions patching

			(CPU alternatives feature).



	noapic		[SMP,APIC] Tells the kernel to not make use of any

			IOAPICs that may be present in the system.



	noautogroup	Disable scheduler automatic task group creation.



	nocache		[ARM]



	no_console_suspend

			[HW] Never suspend the console
@@ -3596,32 +3607,8 @@ 
			/sys/module/printk/parameters/console_suspend) to

			turn on/off it dynamically.



	novmcoredd	[KNL,KDUMP]

			Disable device dump. Device dump allows drivers to

			append dump data to vmcore so you can collect driver

			specified debug info.  Drivers can append the data

			without any limit and this data is stored in memory,

			so this may cause significant memory stress.  Disabling

			device dump can help save memory but the driver debug

			data will be no longer available.  This parameter

			is only available when CONFIG_PROC_VMCORE_DEVICE_DUMP

			is set.



	noaliencache	[MM, NUMA, SLAB] Disables the allocation of alien

			caches in the slab allocator.  Saves per-node memory,

			but will impact performance.



	noalign		[KNL,ARM]



	noaltinstr	[S390] Disables alternative instructions patching

			(CPU alternatives feature).



	noapic		[SMP,APIC] Tells the kernel to not make use of any

			IOAPICs that may be present in the system.



	noautogroup	Disable scheduler automatic task group creation.



	nocache		[ARM]

	no_debug_objects

			[KNL] Disable object debugging



	nodsp		[SH] Disable hardware DSP at boot time.
@@ -3631,14 +3618,6 @@ 


	noexec		[IA-64]



	nosmap		[PPC]

			Disable SMAP (Supervisor Mode Access Prevention)

			even if it is supported by processor.



	nosmep		[PPC64s]

			Disable SMEP (Supervisor Mode Execution Prevention)

			even if it is supported by processor.



	noexec32	[X86-64]

			This affects only 32-bit executables.

			noexec32=on: enable non-executable mappings (default)
@@ -3646,74 +3625,18 @@ 
			noexec32=off: disable non-executable mappings

				read implies executable mappings



	no_file_caps	Tells the kernel not to honor file capabilities.  The

			only way then for a file to be executed with privilege

			is to be setuid root or executed by root.



	nofpu		[MIPS,SH] Disable hardware FPU at boot time.



	nofsgsbase	[X86] Disables FSGSBASE instructions.



	nofxsr		[BUGS=X86-32] Disables x86 floating point extended

			register save and restore. The kernel will only save

			legacy floating-point registers on task switch.



	nohugeiomap	[KNL,X86,PPC,ARM64] Disable kernel huge I/O mappings.



	nohugevmalloc	[KNL,X86,PPC,ARM64] Disable kernel huge vmalloc mappings.



	nosmt		[KNL,S390] Disable symmetric multithreading (SMT).

			Equivalent to smt=1.



			[KNL,X86] Disable symmetric multithreading (SMT).

			nosmt=force: Force disable SMT, cannot be undone

				     via the sysfs control file.



	nospectre_v1	[X86,PPC] Disable mitigations for Spectre Variant 1

			(bounds check bypass). With this option data leaks are

			possible in the system.



	nospectre_v2	[X86,PPC_E500,ARM64] Disable all mitigations for

			the Spectre variant 2 (indirect branch prediction)

			vulnerability. System may allow data leaks with this

			option.



	nospectre_bhb	[ARM64] Disable all mitigations for Spectre-BHB (branch

			history injection) vulnerability. System may allow data leaks

			with this option.



	nospec_store_bypass_disable

			[HW] Disable all mitigations for the Speculative Store Bypass vulnerability



	no_uaccess_flush

	                [PPC] Don't flush the L1-D cache after accessing user data.



	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.



	noxsaveopt	[X86] Disables xsaveopt used in saving x86 extended

			register states. The kernel will fall back to use

			xsave to save the states. By using this parameter,

			performance of saving the states is degraded because

			xsave doesn't support modified optimization while

			xsaveopt supports it on xsaveopt enabled systems.



	noxsaves	[X86] Disables xsaves and xrstors used in saving and

			restoring x86 extended register state in compacted

			form of xsave area. The kernel will fall back to use

			xsaveopt and xrstor to save and restore the states

			in standard form of xsave area. By using this

			parameter, xsave area per process might occupy more

			memory on xsaves enabled systems.



	nohlt		[ARM,ARM64,MICROBLAZE,SH] Forces the kernel to busy wait

			in do_idle() and not use the arch_cpu_idle()

			implementation; requires CONFIG_GENERIC_IDLE_POLL_SETUP

			to be effective. This is useful on platforms where the

			sleep(SH) or wfi(ARM,ARM64) instructions do not work

			correctly or when doing power measurements to evaluate

			the impact of the sleep instructions. This is also

			useful when using JTAG debugger.



	no_file_caps	Tells the kernel not to honor file capabilities.  The

			only way then for a file to be executed with privilege

			is to be setuid root or executed by root.



	nohalt		[IA-64] Tells the kernel not to use the power saving

			function PAL_HALT_LIGHT when idle. This increases

			power-consumption. On the positive side, it reduces
@@ -3737,6 +3660,19 @@ 


	nohibernate	[HIBERNATION] Disable hibernation and resume.



	nohlt		[ARM,ARM64,MICROBLAZE,SH] Forces the kernel to busy wait

			in do_idle() and not use the arch_cpu_idle()

			implementation; requires CONFIG_GENERIC_IDLE_POLL_SETUP

			to be effective. This is useful on platforms where the

			sleep(SH) or wfi(ARM,ARM64) instructions do not work

			correctly or when doing power measurements to evaluate

			the impact of the sleep instructions. This is also

			useful when using JTAG debugger.



	nohugeiomap	[KNL,X86,PPC,ARM64] Disable kernel huge I/O mappings.



	nohugevmalloc	[KNL,X86,PPC,ARM64] Disable kernel huge vmalloc mappings.



	nohz=		[KNL] Boottime enable/disable dynamic ticks

			Valid arguments: on, off

			Default: on
@@ -3754,16 +3690,6 @@ 
			Note that this argument takes precedence over

			the CONFIG_RCU_NOCB_CPU_DEFAULT_ALL option.



	noiotrap	[SH] Disables trapped I/O port accesses.



	noirqdebug	[X86-32] Disables the code which attempts to detect and

			disable unhandled interrupt sources.



	no_timer_check	[X86,APIC] Disables the code which tests for

			broken timer IRQ sources.



	noisapnp	[ISAPNP] Disables ISA PnP code.



	noinitrd	[RAM] Tells the kernel not to load any configured

			initial RAM disk.
@@ -3775,6 +3701,13 @@ 


	noinvpcid	[X86] Disable the INVPCID cpu feature.



	noiotrap	[SH] Disables trapped I/O port accesses.



	noirqdebug	[X86-32] Disables the code which attempts to detect and

			disable unhandled interrupt sources.



	noisapnp	[ISAPNP] Disables ISA PnP code.



	nojitter	[IA-64] Disables jitter checking for ITC timers.



	nokaslr		[KNL]
@@ -3782,18 +3715,10 @@ 
			kernel and module base offset ASLR (Address Space

			Layout Randomization).



	no-kvmclock	[X86,KVM] Disable paravirtualized KVM clock driver



	no-kvmapf	[X86,KVM] Disable paravirtualized asynchronous page

			fault handling.



	no-vmw-sched-clock

			[X86,PV_OPS] Disable paravirtualized VMware scheduler

			clock and use the default one.



	no-steal-acc	[X86,PV_OPS,ARM64,PPC/PSERIES] Disable paravirtualized

			steal time accounting. steal time is computed, but

			won't influence scheduler behaviour

	no-kvmclock	[X86,KVM] Disable paravirtualized KVM clock driver



	nolapic		[X86-32,APIC] Do not enable or use the local APIC.
@@ -3806,10 +3731,6 @@ 
	nomfgpt		[X86-32] Disable Multi-Function General Purpose

			Timer usage (for AMD Geode machines).



	nonmi_ipi	[X86] Disable using NMI IPIs during panic/reboot to

			shutdown the other cpus.  Instead use the REBOOT_VECTOR

			irq.



	nomodeset	Disable kernel modesetting. Most systems' firmware

			sets up a display mode and provides framebuffer memory

			for output. With nomodeset, DRM and fbdev drivers will
@@ -3822,6 +3743,10 @@ 


	nomodule	Disable module load



	nonmi_ipi	[X86] Disable using NMI IPIs during panic/reboot to

			shutdown the other cpus.  Instead use the REBOOT_VECTOR

			irq.



	nopat		[X86] Disable PAT (page attribute table extension of

			pagetables) support.
@@ -3830,6 +3755,9 @@ 
	nopku		[X86] Disable Memory Protection Keys CPU feature found

			in some Intel CPUs.



	nopti		[X86-64]

			Equivalent to pti=off



	nopv=		[X86,XEN,KVM,HYPER_V,VMWARE]

			Disables the PV optimizations forcing the guest to run

			as generic guest with no PV drivers. Currently support
@@ -3849,21 +3777,77 @@ 
	noresume	[SWSUSP] Disables resume and restores original swap

			space.



	nosbagart	[IA-64]



	no-scroll	[VGA] Disables scrollback.

			This is required for the Braillex ib80-piezo Braille

			reader made by F.H. Papenmeier (Germany).



	nosbagart	[IA-64]



	nosgx		[X86-64,SGX] Disables Intel SGX kernel support.



	nosmap		[PPC]

			Disable SMAP (Supervisor Mode Access Prevention)

			even if it is supported by processor.



	nosmep		[PPC64s]

			Disable SMEP (Supervisor Mode Execution Prevention)

			even if it is supported by processor.



	nosmp		[SMP] Tells an SMP kernel to act as a UP kernel,

			and disable the IO APIC.  legacy for "maxcpus=0".



	nosmt		[KNL,S390] Disable symmetric multithreading (SMT).

			Equivalent to smt=1.



			[KNL,X86] Disable symmetric multithreading (SMT).

			nosmt=force: Force disable SMT, cannot be undone

				     via the sysfs control file.



	nosoftlockup	[KNL] Disable the soft-lockup detector.



	nospec_store_bypass_disable

			[HW] Disable all mitigations for the Speculative Store Bypass vulnerability



	nospectre_bhb	[ARM64] Disable all mitigations for Spectre-BHB (branch

			history injection) vulnerability. System may allow data leaks

			with this option.



	nospectre_v1	[X86,PPC] Disable mitigations for Spectre Variant 1

			(bounds check bypass). With this option data leaks are

			possible in the system.



	nospectre_v2	[X86,PPC_E500,ARM64] Disable all mitigations for

			the Spectre variant 2 (indirect branch prediction)

			vulnerability. System may allow data leaks with this

			option.



	no-steal-acc	[X86,PV_OPS,ARM64,PPC/PSERIES] Disable paravirtualized

			steal time accounting. steal time is computed, but

			won't influence scheduler behaviour



	nosync		[HW,M68K] Disables sync negotiation for all devices.



	no_timer_check	[X86,APIC] Disables the code which tests for

			broken timer IRQ sources.



	no_uaccess_flush

	                [PPC] Don't flush the L1-D cache after accessing user data.



	novmcoredd	[KNL,KDUMP]

			Disable device dump. Device dump allows drivers to

			append dump data to vmcore so you can collect driver

			specified debug info.  Drivers can append the data

			without any limit and this data is stored in memory,

			so this may cause significant memory stress.  Disabling

			device dump can help save memory but the driver debug

			data will be no longer available.  This parameter

			is only available when CONFIG_PROC_VMCORE_DEVICE_DUMP

			is set.



	no-vmw-sched-clock

			[X86,PV_OPS] Disable paravirtualized VMware scheduler

			clock and use the default one.



	nowatchdog	[KNL] Disable both lockup detectors, i.e.

			soft-lockup and NMI watchdog (hard-lockup).
@@ -3875,6 +3859,25 @@ 
			LEGACY_XAPIC_DISABLED bit set in the

			IA32_XAPIC_DISABLE_STATUS MSR.



	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.



	noxsaveopt	[X86] Disables xsaveopt used in saving x86 extended

			register states. The kernel will fall back to use

			xsave to save the states. By using this parameter,

			performance of saving the states is degraded because

			xsave doesn't support modified optimization while

			xsaveopt supports it on xsaveopt enabled systems.



	noxsaves	[X86] Disables xsaves and xrstors used in saving and

			restoring x86 extended register state in compacted

			form of xsave area. The kernel will fall back to use

			xsaveopt and xrstor to save and restore the states

			in standard form of xsave area. By using this

			parameter, xsave area per process might occupy more

			memory on xsaves enabled systems.



	nps_mtm_hs_ctr=	[KNL,ARC]

			This parameter sets the maximum duration, in

			cycles, each HW thread of the CTOP can run
@@ -4582,9 +4585,6 @@ 


			Not specifying this option is equivalent to pti=auto.



	nopti		[X86-64]

			Equivalent to pti=off



	pty.legacy_count=

			[KNL] Number of legacy pty's. Overwrites compiled-in

			default number.