Alphabetize several of the kernel boot parameters in kernel-parameters.txt. Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> Cc: Jonathan Corbet <corbet@xxxxxxx> Cc: linux-doc@xxxxxxxxxxxxxxx --- new patch for this series. Documentation/admin-guide/kernel-parameters.txt | 158 +++++++------- 1 file changed, 79 insertions(+), 79 deletions(-) --- linux-next-20220331.orig/Documentation/admin-guide/kernel-parameters.txt +++ linux-next-20220331/Documentation/admin-guide/kernel-parameters.txt @@ -461,6 +461,12 @@ Format: <io>,<irq>,<mode> See header of drivers/net/hamradio/baycom_ser_hdx.c. + bert_disable [ACPI] + Disable BERT OS support on buggy BIOSes. + + bgrt_disable [ACPI][X86] + Disable BGRT to avoid flickering OEM logo. + blkdevparts= Manual partition parsing of block device(s) for embedded devices based on command line input. See Documentation/block/cmdline-partition.rst @@ -476,12 +482,6 @@ See Documentation/admin-guide/bootconfig.rst - bert_disable [ACPI] - Disable BERT OS support on buggy BIOSes. - - bgrt_disable [ACPI][X86] - Disable BGRT to avoid flickering OEM logo. - bttv.card= [HW,V4L] bttv (bt848 + bt878 based grabber cards) bttv.radio= Most important insmod options are available as kernel args too. @@ -766,6 +766,24 @@ 0: default value, disable debugging 1: enable debugging at boot time + cpcihp_generic= [HW,PCI] Generic port I/O CompactPCI driver + Format: + <first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>] + + cpu0_hotplug [X86] Turn on CPU0 hotplug feature when + CONFIG_BOOTPARAM_HOTPLUG_CPU0 is off. + Some features depend on CPU0. Known dependencies are: + 1. Resume from suspend/hibernate depends on CPU0. + Suspend/hibernate will fail if CPU0 is offline and you + need to online CPU0 before suspend/hibernate. + 2. PIC interrupts also depend on CPU0. CPU0 can't be + removed if a PIC interrupt is detected. + It's said poweroff/reboot may depend on CPU0 on some + machines although I haven't seen such issues so far + after CPU0 is offline on a few tested machines. + If the dependencies are under your control, you can + turn on cpu0_hotplug. + cpuidle.off=1 [CPU_IDLE] disable the cpuidle sub-system @@ -786,9 +804,13 @@ on every CPU online, such as boot, and resume from suspend. Default: 10000 - cpcihp_generic= [HW,PCI] Generic port I/O CompactPCI driver - Format: - <first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>] + crash_kexec_post_notifiers + Run kdump after running panic-notifiers and dumping + kmsg. This only for the users who doubt kdump always + succeeds in any situation. + Note that this also increases risks of kdump failure, + because some panic notifiers can make the crashed + kernel more unstable. crashkernel=size[KMG][@offset[KMG]] [KNL] Using kexec, Linux can switch to a 'crash kernel' @@ -1640,16 +1662,6 @@ hpet_mmap= [X86, HPET_MMAP] Allow userspace to mmap HPET registers. Default set by CONFIG_HPET_MMAP_DEFAULT. - hugetlb_cma= [HW,CMA] The size of a CMA area used for allocation - of gigantic hugepages. Or using node format, the size - of a CMA area per node can be specified. - Format: nn[KMGTPE] or (node format) - <node>:nn[KMGTPE][,<node>:nn[KMGTPE]] - - Reserve a CMA area of given size and allocate gigantic - hugepages using the CMA allocator. If enabled, the - boot-time allocation of gigantic hugepages is skipped. - hugepages= [HW] Number of HugeTLB pages to allocate at boot. If this follows hugepagesz (below), it specifies the number of pages of hugepagesz to be allocated. @@ -1671,6 +1683,16 @@ Documentation/admin-guide/mm/hugetlbpage.rst. Format: size[KMG] + hugetlb_cma= [HW,CMA] The size of a CMA area used for allocation + of gigantic hugepages. Or using node format, the size + of a CMA area per node can be specified. + Format: nn[KMGTPE] or (node format) + <node>:nn[KMGTPE][,<node>:nn[KMGTPE]] + + Reserve a CMA area of given size and allocate gigantic + hugepages using the CMA allocator. If enabled, the + boot-time allocation of gigantic hugepages is skipped. + hugetlb_free_vmemmap= [KNL] Reguires CONFIG_HUGETLB_PAGE_FREE_VMEMMAP enabled. @@ -2683,8 +2705,6 @@ If there are multiple matching configurations changing the same attribute, the last one is used. - memblock=debug [KNL] Enable memblock debug messages. - load_ramdisk= [RAM] [Deprecated] lockd.nlm_grace_period=P [NFS] Assign grace period. @@ -2926,6 +2946,8 @@ mem=nopentium [BUGS=X86-32] Disable usage of 4MB pages for kernel memory. + memblock=debug [KNL] Enable memblock debug messages. + memchunk=nn[KMG] [KNL,SH] Allow user to override the default size for per-device physically contiguous DMA buffers. @@ -3193,10 +3215,6 @@ mtdparts= [MTD] See drivers/mtd/parsers/cmdlinepart.c - multitce=off [PPC] This parameter disables the use of the pSeries - firmware feature for updating multiple TCE entries - at a time. - mtdset= [ARM] ARM/S3C2412 JIVE boot control @@ -3223,6 +3241,10 @@ Used for mtrr cleanup. It is spare mtrr entries number. Set to 2 or more if your graphical card needs more. + multitce=off [PPC] This parameter disables the use of the pSeries + firmware feature for updating multiple TCE entries + at a time. + n2= [NET] SDL Inc. RISCom/N2 synchronous serial card netdev= [NET] Network devices parameters @@ -3232,6 +3254,11 @@ This usage is only documented in each driver source file if at all. + netpoll.carrier_timeout= + [NET] Specifies amount of time (in seconds) that + netpoll should wait for a carrier. By default netpoll + waits 4 seconds. + nf_conntrack.acct= [NETFILTER] Enable connection tracking flow accounting 0 to disable accounting @@ -3382,11 +3409,6 @@ These settings can be accessed at runtime via the nmi_watchdog and hardlockup_panic sysctls. - netpoll.carrier_timeout= - [NET] Specifies amount of time (in seconds) that - netpoll should wait for a carrier. By default netpoll - waits 4 seconds. - no387 [BUGS=X86-32] Tells the kernel to use the 387 maths emulation library even if a 387 maths coprocessor is present. @@ -3678,20 +3700,6 @@ nox2apic [X86-64,APIC] Do not enable x2APIC mode. - cpu0_hotplug [X86] Turn on CPU0 hotplug feature when - CONFIG_BOOTPARAM_HOTPLUG_CPU0 is off. - Some features depend on CPU0. Known dependencies are: - 1. Resume from suspend/hibernate depends on CPU0. - Suspend/hibernate will fail if CPU0 is offline and you - need to online CPU0 before suspend/hibernate. - 2. PIC interrupts also depend on CPU0. CPU0 can't be - removed if a PIC interrupt is detected. - It's said poweroff/reboot may depend on CPU0 on some - machines although I haven't seen such issues so far - after CPU0 is offline on a few tested machines. - If the dependencies are under your control, you can - turn on cpu0_hotplug. - nps_mtm_hs_ctr= [KNL,ARC] This parameter sets the maximum duration, in cycles, each HW thread of the CTOP can run @@ -3824,14 +3832,6 @@ panic_on_warn panic() instead of WARN(). Useful to cause kdump on a WARN(). - crash_kexec_post_notifiers - Run kdump after running panic-notifiers and dumping - kmsg. This only for the users who doubt kdump always - succeeds in any situation. - Note that this also increases risks of kdump failure, - because some panic notifiers can make the crashed - kernel more unstable. - parkbd.port= [HW] Parallel port number the keyboard adapter is connected to, default is 0. Format: <parport#> @@ -5908,33 +5908,6 @@ This will guarantee that all the other pcrs are saved. - trace_buf_size=nn[KMG] - [FTRACE] will set tracing buffer size on each cpu. - - trace_clock= [FTRACE] See Documentation/trace/ftrace.rst - - trace_event=[event-list] - [FTRACE] Set and start specified trace events in order - to facilitate early boot debugging. The event-list is a - comma-separated list of trace events to enable. See - also Documentation/trace/events.rst - - trace_options=[option-list] - [FTRACE] Enable or disable tracer options at boot. - The option-list is a comma delimited list of options - that can be enabled or disabled just as if you were - to echo the option name into - - /sys/kernel/debug/tracing/trace_options - - For example, to enable stacktrace option (to dump the - stack trace of each event), add to the command line: - - trace_options=stacktrace - - See also Documentation/trace/ftrace.rst "trace options" - section. - tp_printk [FTRACE] Have the tracepoints sent to printk as well as the tracing ring buffer. This is useful for early boot up @@ -5966,6 +5939,33 @@ This command line option will stop the printing of events to console at the late_initcall_sync() time frame. + trace_buf_size=nn[KMG] + [FTRACE] will set tracing buffer size on each cpu. + + trace_clock= [FTRACE] See Documentation/trace/ftrace.rst + + trace_event=[event-list] + [FTRACE] Set and start specified trace events in order + to facilitate early boot debugging. The event-list is a + comma-separated list of trace events to enable. See + also Documentation/trace/events.rst + + trace_options=[option-list] + [FTRACE] Enable or disable tracer options at boot. + The option-list is a comma delimited list of options + that can be enabled or disabled just as if you were + to echo the option name into + + /sys/kernel/debug/tracing/trace_options + + For example, to enable stacktrace option (to dump the + stack trace of each event), add to the command line: + + trace_options=stacktrace + + See also Documentation/trace/ftrace.rst "trace options" + section. + traceoff_on_warning [FTRACE] enable this option to disable tracing when a warning is hit. This turns off "tracing_on". Tracing can
