diff options
Diffstat (limited to 'Documentation/kernel-parameters.txt')
| -rw-r--r-- | Documentation/kernel-parameters.txt | 42 |
1 files changed, 36 insertions, 6 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 5438a2d7907..e279b724291 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -163,6 +163,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted. See also Documentation/power/pm.txt, pci=noacpi + acpi_rsdp= [ACPI,EFI,KEXEC] + Pass the RSDP address to the kernel, mostly used + on machines running EFI runtime service to boot the + second kernel for kdump. + acpi_apic_instance= [ACPI, IOAPIC] Format: <int> 2: use 2nd APIC table, if available @@ -546,6 +551,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted. /proc/<pid>/coredump_filter. See also Documentation/filesystems/proc.txt. + cpuidle.off=1 [CPU_IDLE] + disable the cpuidle sub-system + cpcihp_generic= [HW,PCI] Generic port I/O CompactPCI driver Format: <first_slot>,<last_slot>,<port>,<enum_bit>[,<debug>] @@ -999,7 +1007,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. With this option on every unmap_single operation will result in a hardware IOTLB flush operation as opposed to batching them for performance. - + sp_off [Default Off] + By default, super page will be supported if Intel IOMMU + has the capability. With this option, super page will + not be supported. intremap= [X86-64, Intel-IOMMU] Format: { on (default) | off | nosid } on enable Interrupt Remapping (default) @@ -1156,10 +1167,6 @@ bytes respectively. Such letter suffixes can also be entirely omitted. for all guests. Default is 1 (enabled) if in 64bit or 32bit-PAE mode - kvm-intel.bypass_guest_pf= - [KVM,Intel] Disables bypassing of guest page faults - on Intel chips. Default is 1 (enabled) - kvm-intel.ept= [KVM,Intel] Disable extended page tables (virtualized MMU) support on capable Intel chips. Default is 1 (enabled) @@ -1734,6 +1741,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. no-kvmapf [X86,KVM] Disable paravirtualized asynchronous page fault handling. + no-steal-acc [X86,KVM] Disable paravirtualized steal time accounting. + steal time is computed, but won't influence scheduler + behaviour + nolapic [X86-32,APIC] Do not enable or use the local APIC. nolapic_timer [X86-32,APIC] Do not use the local APIC timer. @@ -1843,7 +1854,9 @@ bytes respectively. Such letter suffixes can also be entirely omitted. See Documentation/sound/oss/oss-parameters.txt panic= [KNL] Kernel behaviour on panic: delay <timeout> - seconds before rebooting + timeout > 0: seconds before rebooting + timeout = 0: wait forever + timeout < 0: reboot immediately Format: <timeout> parkbd.port= [HW] Parallel port number the keyboard adapter is @@ -2012,6 +2025,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted. the default. off: Turn ECRC off on: Turn ECRC on. + realloc reallocate PCI resources if allocations done by BIOS + are erroneous. pcie_aspm= [PCIE] Forcibly enable or disable PCIe Active State Power Management. @@ -2146,6 +2161,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted. [HW,MOUSE] Controls Logitech smartscroll autorepeat. 0 = disabled, 1 = enabled (default). + pstore.backend= Specify the name of the pstore backend to use + pt. [PARIDE] See Documentation/blockdev/paride.txt. @@ -2231,6 +2248,7 @@ bytes respectively. Such letter suffixes can also be entirely omitted. ro [KNL] Mount root device read-only on boot root= [KNL] Root filesystem + See name_to_dev_t comment in init/do_mounts.c. rootdelay= [KNL] Delay (in seconds) to pause before attempting to mount the root filesystem @@ -2521,6 +2539,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted. <port#>,<js1>,<js2>,<js3>,<js4>,<js5>,<js6>,<js7> See also Documentation/input/joystick-parport.txt + udbg-immortal [PPC] When debugging early kernel crashes that + happen after console_init() and before a proper + console driver takes over, this boot options might + help "seeing" what's going on. + uhash_entries= [KNL,NET] Set number of hash buckets for UDP/UDP-Lite connections @@ -2535,6 +2558,11 @@ bytes respectively. Such letter suffixes can also be entirely omitted. unknown_nmi_panic [X86] Cause panic on unknown NMI. + usbcore.authorized_default= + [USB] Default USB device authorization: + (default -1 = authorized except for wireless USB, + 0 = not authorized, 1 = authorized) + usbcore.autosuspend= [USB] The autosuspend time delay (in seconds) used for newly-detected USB devices (default 2). This @@ -2595,6 +2623,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted. unlock ejectable media); m = MAX_SECTORS_64 (don't transfer more than 64 sectors = 32 KB at a time); + n = INITIAL_READ10 (force a retry of the + initial READ(10) command); o = CAPACITY_OK (accept the capacity reported by the device); r = IGNORE_RESIDUE (the device reports |