diff options
Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 84 |
1 files changed, 57 insertions, 27 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 7116fda7077f..30a8ad0dae53 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -229,8 +229,24 @@ bytes respectively. Such letter suffixes can also be entirely omitted. use by PCI Format: <irq>,<irq>... + acpi_no_auto_serialize [HW,ACPI] + Disable auto-serialization of AML methods + AML control methods that contain the opcodes to create + named objects will be marked as "Serialized" by the + auto-serialization feature. + This feature is enabled by default. + This option allows to turn off the feature. + acpi_no_auto_ssdt [HW,ACPI] Disable automatic loading of SSDT + acpica_no_return_repair [HW, ACPI] + Disable AML predefined validation mechanism + This mechanism can repair the evaluation result to make + the return objects more ACPI specification compliant. + This option is useful for developers to identify the + root cause of an AML interpreter issue when the issue + has something to do with the repair mechanism. + acpi_os_name= [HW,ACPI] Tell ACPI BIOS the name of the OS Format: To spoof as Windows 98: ="Microsoft Windows" @@ -298,8 +314,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted. acpi_sci= [HW,ACPI] ACPI System Control Interrupt trigger mode Format: { level | edge | high | low } - acpi_serialize [HW,ACPI] force serialization of AML methods - acpi_skip_timer_override [HW,ACPI] Recognize and ignore IRQ0/pin2 Interrupt Override. For broken nForce2 BIOS resulting in XT-PIC timer. @@ -790,13 +804,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted. dhash_entries= [KNL] Set number of hash buckets for dentry cache. - digi= [HW,SERIAL] - IO parameters + enable/disable command. - - digiepca= [HW,SERIAL] - See drivers/char/README.epca and - Documentation/serial/digiepca.txt. - disable= [IPV6] See Documentation/networking/ipv6.txt. @@ -870,6 +877,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted. Enable debug messages at boot time. See Documentation/dynamic-debug-howto.txt for details. + early_ioremap_debug [KNL] + Enable debug messages in early_ioremap support. This + is useful for tracking down temporary early mappings + which are not unmapped. + earlycon= [KNL] Output early console device and options. uart[8250],io,<addr>[,options] uart[8250],mmio,<addr>[,options] @@ -1011,6 +1023,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted. parameter will force ia64_sal_cache_flush to call ia64_pal_cache_flush instead of SAL_CACHE_FLUSH. + forcepae [X86-32] + Forcefully enable Physical Address Extension (PAE). + Many Pentium M systems disable PAE but may have a + functionally usable PAE implementation. + Warning: use of this parameter will taint the kernel + and may cause unknown problems. + ftrace=[tracer] [FTRACE] will set and start the specified tracer as early as possible in order to facilitate early @@ -2053,8 +2072,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted. IOAPICs that may be present in the system. nokaslr [X86] - Disable kernel base offset ASLR (Address Space - Layout Randomization) if built into the kernel. + Disable kernel and module base offset ASLR (Address + Space Layout Randomization) if built into the kernel. noautogroup Disable scheduler automatic task group creation. @@ -2199,10 +2218,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. noreplace-smp [X86-32,SMP] Don't replace SMP instructions with UP alternatives - nordrand [X86] Disable the direct use of the RDRAND - instruction even if it is supported by the - processor. RDRAND is still available to user - space applications. + nordrand [X86] Disable kernel use of the RDRAND and + RDSEED instructions even if they are supported + by the processor. RDRAND and RDSEED are still + available to user space applications. noresume [SWSUSP] Disables resume and restores original swap space. @@ -2537,6 +2556,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted. pcmv= [HW,PCMCIA] BadgePAD 4 + pd_ignore_unused + [PM] + Keep all power-domains already enabled by bootloader on, + even if no driver has claimed them. This is useful + for debug and development, but should not be + needed on a platform with proper driver support. + pd. [PARIDE] See Documentation/blockdev/paride.txt. @@ -2906,9 +2932,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted. rhash_entries= [KNL,NET] Set number of hash buckets for route cache - riscom8= [HW,SERIAL] - Format: <io_board1>[,<io_board2>[,...<io_boardN>]] - ro [KNL] Mount root device read-only on boot root= [KNL] Root filesystem @@ -3050,9 +3073,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted. sonypi.*= [HW] Sony Programmable I/O Control Device driver See Documentation/laptops/sonypi.txt - specialix= [HW,SERIAL] Specialix multi-serial port adapter - See Documentation/serial/specialix.txt. - spia_io_base= [HW,MTD] spia_fio_base= spia_pedr= @@ -3409,14 +3429,24 @@ bytes respectively. Such letter suffixes can also be entirely omitted. of CONFIG_HIGHPTE. vdso= [X86,SH] - vdso=2: enable compat VDSO (default with COMPAT_VDSO) - vdso=1: enable VDSO (default) + On X86_32, this is an alias for vdso32=. Otherwise: + + vdso=1: enable VDSO (the default) vdso=0: disable VDSO mapping - vdso32= [X86] - vdso32=2: enable compat VDSO (default with COMPAT_VDSO) - vdso32=1: enable 32-bit VDSO (default) - vdso32=0: disable 32-bit VDSO mapping + vdso32= [X86] Control the 32-bit vDSO + vdso32=1: enable 32-bit VDSO + vdso32=0 or vdso32=2: disable 32-bit VDSO + + See the help text for CONFIG_COMPAT_VDSO for more + details. If CONFIG_COMPAT_VDSO is set, the default is + vdso32=0; otherwise, the default is vdso32=1. + + For compatibility with older kernels, vdso32=2 is an + alias for vdso32=0. + + Try vdso32=0 if you encounter an error that says: + dl_main: Assertion `(void *) ph->p_vaddr == _rtld_local._dl_sysinfo_dso' failed! vector= [IA-64,SMP] vector=percpu: enable percpu vector domain |