Documentation/admin-guide/kernel-parameters.txt

487 	bulk_remove=off	[PPC]  This parameter disables the use of the pSeries
532 			Specifying "pressure" disables per-cgroup pressure
540 			"all" blacklists all controllers and "named" disables
541 			named mounts. Specifying both "all" and "named" disables
632 			memory allocations. A value of 0 disables CMA
639 			contiguous memory allocations. A value of 0 disables
727 			seconds. A value of 0 disables the blank timer.
937 			Disables the use of 1TB hash page table segments. This
1001 			entry later. This parameter disables that.
1006 			MTRR settings.  This parameter disables that behavior,
1016 			this option disables the debugging code at boot.
1022 			DMA-API debugging code disables itself because the
1617 	hv_nopvspin	[X86,HYPER_V] Disables the paravirt spinlock optimizations
1942 			0	disables intel_idle and fall back on acpi_idle.
2170 			When CONFIG_RANDOMIZE_BASE is set, this disables
2300 			back to huge pages.  0 disables the recovery, otherwise if
2381 			never:	Disables the mitigation
2397 				L1TF vulnerability. Disables SMT and
2409 				Same as 'full', but disables SMT and L1D
2428 				Disables SMT and enables the default
2444 				Disables hypervisor mitigations and doesn't
2481 	libata.noacpi	[LIBATA] Disables use of ACPI in libata suspend/resume
2630 	logo.nologo	[FB] Disables display of the built-in Linux logo.
2637 	lp=reset		first parallel port). 'lp=0' disables the
2693 			which also disables the IO APIC.
2844 			other rate.  0 disables periodic checking.
2965 			of 0 disables mminit logging and a level of 4 will
3049 	multitce=off	[PPC]  This parameter disables the use of the pSeries
3266 	nofsgsbase	[X86] Disables FSGSBASE instructions.
3294 	noaliencache	[MM, NUMA, SLAB] Disables the allocation of alien
3300 	noaltinstr	[S390] Disables alternative instructions patching
3347 	nofxsr		[BUGS=X86-32] Disables x86 floating point extended
3375 	noxsave		[BUGS=X86] Disables x86 extended register state save
3379 	noxsaveopt	[X86] Disables xsaveopt used in saving x86 extended
3386 	noxsaves	[X86] Disables xsaves and xrstors used in saving and
3439 	noiotrap	[SH] Disables trapped I/O port accesses.
3441 	noirqdebug	[X86-32] Disables the code which attempts to detect and
3444 	no_timer_check	[X86,APIC] Disables the code which tests for
3447 	noisapnp	[ISAPNP] Disables ISA PnP code.
3460 	nojitter	[IA-64] Disables jitter checking for ITC timers.
3511 	noresume	[SWSUSP] Disables resume and restores original swap
3514 	no-scroll	[VGA] Disables scrollback.
3520 	nosep		[BUGS=X86-32] Disables x86 SYSENTER/SYSEXIT support.
3527 	nosync		[HW,M68K] Disables sync negotiation for all devices.
3692 	parport=	[HW,PPT] Specify parallel ports. 0 disables.
4046 	powersave=off	[PPC] This option disables power saving features.
4047 			It specifically disables cpuidle and sets the
4896 			default) disables this feature.  Please note
4914 			is the default) disables CPU-hotplug operations.
4925 			of zero disables statistics output.
5591 			This option is useful, as it disables the trace before
5609 			disables clocksource verification at runtime, as well
6081 			disables both lockup detectors. Default is 10
6087 			help debugging.  0 disables workqueue stall
6162 			Disables the qspinlock slowpath using Xen PV optimizations.
6167 			Disables the PV optimizations forcing the HVM guest to
6212 			Disables the PV optimizations forcing the guest to run
6217 			Disables the qspinlock slow path using PV optimizations