Docs/admin: alphabetize some kernel-parameters (part 1)
Move some out-of-place kernel parameters into their correct locations. Move one out-of-order keyword/legend in kernel-parameters.rst. Add some missing keyword legends in kernel-parameters.rst: HIBERNATION HYPER_V and drop some obsolete/removed keyword legends: EIDE IOSCHED OSS TS XT Correct the location of the setup.h file. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Pavel Machek <pavel@ucw.cz> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Randy Dunlap
Jonathan Corbet
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d2fc83c149
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@ -99,6 +99,7 @@ parameter is applicable::
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ALSA ALSA sound support is enabled.
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APIC APIC support is enabled.
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APM Advanced Power Management support is enabled.
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APPARMOR AppArmor support is enabled.
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ARM ARM architecture is enabled.
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ARM64 ARM64 architecture is enabled.
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AX25 Appropriate AX.25 support is enabled.
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@ -108,15 +109,15 @@ parameter is applicable::
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DYNAMIC_DEBUG Build in debug messages and enable them at runtime
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EDD BIOS Enhanced Disk Drive Services (EDD) is enabled
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EFI EFI Partitioning (GPT) is enabled
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EIDE EIDE/ATAPI support is enabled.
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EVM Extended Verification Module
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FB The frame buffer device is enabled.
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FTRACE Function tracing enabled.
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GCOV GCOV profiling is enabled.
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HIBERNATION HIBERNATION is enabled.
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HW Appropriate hardware is enabled.
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HYPER_V HYPERV support is enabled.
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IA-64 IA-64 architecture is enabled.
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IMA Integrity measurement architecture is enabled.
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IOSCHED More than one I/O scheduler is enabled.
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IP_PNP IP DHCP, BOOTP, or RARP is enabled.
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IPV6 IPv6 support is enabled.
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ISAPNP ISA PnP code is enabled.
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@ -140,7 +141,6 @@ parameter is applicable::
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NUMA NUMA support is enabled.
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NFS Appropriate NFS support is enabled.
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OF Devicetree is enabled.
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OSS OSS sound support is enabled.
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PV_OPS A paravirtualized kernel is enabled.
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PARIDE The ParIDE (parallel port IDE) subsystem is enabled.
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PARISC The PA-RISC architecture is enabled.
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@ -160,7 +160,6 @@ parameter is applicable::
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the Documentation/scsi/ sub-directory.
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SECURITY Different security models are enabled.
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SELINUX SELinux support is enabled.
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APPARMOR AppArmor support is enabled.
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SERIAL Serial support is enabled.
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SH SuperH architecture is enabled.
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SMP The kernel is an SMP kernel.
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@ -168,7 +167,6 @@ parameter is applicable::
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SWSUSP Software suspend (hibernation) is enabled.
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SUSPEND System suspend states are enabled.
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TPM TPM drivers are enabled.
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TS Appropriate touchscreen support is enabled.
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UMS USB Mass Storage support is enabled.
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USB USB support is enabled.
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USBHID USB Human Interface Device support is enabled.
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@ -177,7 +175,6 @@ parameter is applicable::
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VGA The VGA console has been enabled.
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VT Virtual terminal support is enabled.
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WDT Watchdog support is enabled.
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XT IBM PC/XT MFM hard disk support is enabled.
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X86-32 X86-32, aka i386 architecture is enabled.
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X86-64 X86-64 architecture is enabled.
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More X86-64 boot options can be found in
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@ -211,7 +208,7 @@ The number of kernel parameters is not limited, but the length of the
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complete command line (parameters including spaces etc.) is limited to
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a fixed number of characters. This limit depends on the architecture
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and is between 256 and 4096 characters. It is defined in the file
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./include/asm/setup.h as COMMAND_LINE_SIZE.
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./include/uapi/asm-generic/setup.h as COMMAND_LINE_SIZE.
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Finally, the [KMG] suffix is commonly described after a number of kernel
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parameter values. These 'K', 'M', and 'G' letters represent the _binary_
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@ -563,6 +563,20 @@
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cio_ignore= [S390]
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See Documentation/s390/common_io.rst for details.
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clearcpuid=BITNUM[,BITNUM...] [X86]
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Disable CPUID feature X for the kernel. See
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arch/x86/include/asm/cpufeatures.h for the valid bit
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numbers. Note the Linux specific bits are not necessarily
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stable over kernel options, but the vendor specific
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ones should be.
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Also note that user programs calling CPUID directly
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or using the feature without checking anything
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will still see it. This just prevents it from
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being used by the kernel or shown in /proc/cpuinfo.
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Also note the kernel might malfunction if you disable
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some critical bits.
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clk_ignore_unused
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[CLK]
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Prevents the clock framework from automatically gating
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@ -631,19 +645,6 @@
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Defaults to zero when built as a module and to
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10 seconds when built into the kernel.
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clearcpuid=BITNUM[,BITNUM...] [X86]
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Disable CPUID feature X for the kernel. See
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arch/x86/include/asm/cpufeatures.h for the valid bit
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numbers. Note the Linux specific bits are not necessarily
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stable over kernel options, but the vendor specific
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ones should be.
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Also note that user programs calling CPUID directly
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or using the feature without checking anything
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will still see it. This just prevents it from
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being used by the kernel or shown in /proc/cpuinfo.
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Also note the kernel might malfunction if you disable
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some critical bits.
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cma=nn[MG]@[start[MG][-end[MG]]]
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[KNL,CMA]
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Sets the size of kernel global memory area for
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@ -950,6 +951,8 @@
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dump out devices still on the deferred probe list after
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retrying.
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delayacct [KNL] Enable per-task delay accounting
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dell_smm_hwmon.ignore_dmi=
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[HW] Continue probing hardware even if DMI data
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indicates that the driver is running on unsupported
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@ -1003,17 +1006,6 @@
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disable= [IPV6]
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See Documentation/networking/ipv6.rst.
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hardened_usercopy=
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[KNL] Under CONFIG_HARDENED_USERCOPY, whether
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hardening is enabled for this boot. Hardened
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usercopy checking is used to protect the kernel
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from reading or writing beyond known memory
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allocation boundaries as a proactive defense
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against bounds-checking flaws in the kernel's
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copy_to_user()/copy_from_user() interface.
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on Perform hardened usercopy checks (default).
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off Disable hardened usercopy checks.
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disable_radix [PPC]
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Disable RADIX MMU mode on POWER9
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@ -1316,17 +1308,6 @@
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force: enforce the use of EDAC to report H/W event.
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default: on.
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ekgdboc= [X86,KGDB] Allow early kernel console debugging
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ekgdboc=kbd
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This is designed to be used in conjunction with
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the boot argument: earlyprintk=vga
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This parameter works in place of the kgdboc parameter
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but can only be used if the backing tty is available
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very early in the boot process. For early debugging
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via a serial port see kgdboc_earlycon instead.
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edd= [EDD]
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Format: {"off" | "on" | "skip[mbr]"}
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@ -1388,6 +1369,17 @@
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eisa_irq_edge= [PARISC,HW]
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See header of drivers/parisc/eisa.c.
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ekgdboc= [X86,KGDB] Allow early kernel console debugging
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Format: ekgdboc=kbd
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This is designed to be used in conjunction with
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the boot argument: earlyprintk=vga
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This parameter works in place of the kgdboc parameter
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but can only be used if the backing tty is available
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very early in the boot process. For early debugging
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via a serial port see kgdboc_earlycon instead.
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elanfreq= [X86-32]
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See comment before function elanfreq_setup() in
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arch/x86/kernel/cpu/cpufreq/elanfreq.c.
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@ -1586,6 +1578,17 @@
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Format: <unsigned int> such that (rxsize & ~0x1fffc0) == 0.
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Default: 1024
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hardened_usercopy=
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[KNL] Under CONFIG_HARDENED_USERCOPY, whether
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hardening is enabled for this boot. Hardened
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usercopy checking is used to protect the kernel
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from reading or writing beyond known memory
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allocation boundaries as a proactive defense
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against bounds-checking flaws in the kernel's
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copy_to_user()/copy_from_user() interface.
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on Perform hardened usercopy checks (default).
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off Disable hardened usercopy checks.
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hardlockup_all_cpu_backtrace=
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[KNL] Should the hard-lockup detector generate
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backtraces on all cpus.
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@ -1606,6 +1609,15 @@
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corresponding firmware-first mode error processing
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logic will be disabled.
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hibernate= [HIBERNATION]
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noresume Don't check if there's a hibernation image
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present during boot.
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nocompress Don't compress/decompress hibernation images.
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no Disable hibernation and resume.
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protect_image Turn on image protection during restoration
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(that will set all pages holding image data
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during restoration read-only).
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highmem=nn[KMG] [KNL,BOOT] forces the highmem zone to have an exact
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size of <nn>. This works even on boxes that have no
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highmem otherwise. This also works to reduce highmem
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@ -3185,16 +3197,6 @@
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firmware feature for updating multiple TCE entries
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at a time.
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onenand.bdry= [HW,MTD] Flex-OneNAND Boundary Configuration
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Format: [die0_boundary][,die0_lock][,die1_boundary][,die1_lock]
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boundary - index of last SLC block on Flex-OneNAND.
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The remaining blocks are configured as MLC blocks.
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lock - Configure if Flex-OneNAND boundary should be locked.
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Once locked, the boundary cannot be changed.
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1 indicates lock status, 0 indicates unlock status.
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mtdset= [ARM]
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ARM/S3C2412 JIVE boot control
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@ -3441,8 +3443,6 @@
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noclflush [BUGS=X86] Don't use the CLFLUSH instruction
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delayacct [KNL] Enable per-task delay accounting
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nodsp [SH] Disable hardware DSP at boot time.
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noefi Disable EFI runtime services support.
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@ -3744,6 +3744,16 @@
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For example, to override I2C bus2:
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omap_mux=i2c2_scl.i2c2_scl=0x100,i2c2_sda.i2c2_sda=0x100
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onenand.bdry= [HW,MTD] Flex-OneNAND Boundary Configuration
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Format: [die0_boundary][,die0_lock][,die1_boundary][,die1_lock]
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boundary - index of last SLC block on Flex-OneNAND.
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The remaining blocks are configured as MLC blocks.
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lock - Configure if Flex-OneNAND boundary should be locked.
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Once locked, the boundary cannot be changed.
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1 indicates lock status, 0 indicates unlock status.
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oops=panic Always panic on oopses. Default is to just kill the
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process, but there is a small probability of
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deadlocking the machine.
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@ -5077,15 +5087,6 @@
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Useful for devices that are detected asynchronously
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(e.g. USB and MMC devices).
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hibernate= [HIBERNATION]
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noresume Don't check if there's a hibernation image
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present during boot.
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nocompress Don't compress/decompress hibernation images.
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no Disable hibernation and resume.
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protect_image Turn on image protection during restoration
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(that will set all pages holding image data
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during restoration read-only).
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retain_initrd [RAM] Keep initrd memory after extraction
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rfkill.default_state=
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