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-rw-r--r--Documentation/kernel-parameters.txt44
1 files changed, 38 insertions, 6 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index dd00fd556a60..b79bcdf16319 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -164,6 +164,10 @@ and is between 256 and 4096 characters. It is defined in the file
164 acpi_skip_timer_override [HW,ACPI] 164 acpi_skip_timer_override [HW,ACPI]
165 Recognize and ignore IRQ0/pin2 Interrupt Override. 165 Recognize and ignore IRQ0/pin2 Interrupt Override.
166 For broken nForce2 BIOS resulting in XT-PIC timer. 166 For broken nForce2 BIOS resulting in XT-PIC timer.
167 acpi_use_timer_override [HW,ACPI}
168 Use timer override. For some broken Nvidia NF5 boards
169 that require a timer override, but don't have
170 HPET
167 171
168 acpi_dbg_layer= [HW,ACPI] 172 acpi_dbg_layer= [HW,ACPI]
169 Format: <int> 173 Format: <int>
@@ -553,9 +557,6 @@ and is between 256 and 4096 characters. It is defined in the file
553 floppy= [HW] 557 floppy= [HW]
554 See Documentation/floppy.txt. 558 See Documentation/floppy.txt.
555 559
556 ftape= [HW] Floppy Tape subsystem debugging options.
557 See Documentation/ftape.txt.
558
559 gamecon.map[2|3]= 560 gamecon.map[2|3]=
560 [HW,JOY] Multisystem joystick and NES/SNES/PSX pad 561 [HW,JOY] Multisystem joystick and NES/SNES/PSX pad
561 support via parallel port (up to 5 devices per port) 562 support via parallel port (up to 5 devices per port)
@@ -598,8 +599,6 @@ and is between 256 and 4096 characters. It is defined in the file
598 599
599 hugepages= [HW,IA-32,IA-64] Maximal number of HugeTLB pages. 600 hugepages= [HW,IA-32,IA-64] Maximal number of HugeTLB pages.
600 601
601 noirqbalance [IA-32,SMP,KNL] Disable kernel irq balancing
602
603 i8042.direct [HW] Put keyboard port into non-translated mode 602 i8042.direct [HW] Put keyboard port into non-translated mode
604 i8042.dumbkbd [HW] Pretend that controller can only read data from 603 i8042.dumbkbd [HW] Pretend that controller can only read data from
605 keyboard and cannot control its state 604 keyboard and cannot control its state
@@ -649,6 +648,10 @@ and is between 256 and 4096 characters. It is defined in the file
649 idle= [HW] 648 idle= [HW]
650 Format: idle=poll or idle=halt 649 Format: idle=poll or idle=halt
651 650
651 ignore_loglevel [KNL]
652 Ignore loglevel setting - this will print /all/
653 kernel messages to the console. Useful for debugging.
654
652 ihash_entries= [KNL] 655 ihash_entries= [KNL]
653 Set number of hash buckets for inode cache. 656 Set number of hash buckets for inode cache.
654 657
@@ -713,7 +716,12 @@ and is between 256 and 4096 characters. It is defined in the file
713 Format: <RDP>,<reset>,<pci_scan>,<verbosity> 716 Format: <RDP>,<reset>,<pci_scan>,<verbosity>
714 717
715 isolcpus= [KNL,SMP] Isolate CPUs from the general scheduler. 718 isolcpus= [KNL,SMP] Isolate CPUs from the general scheduler.
716 Format: <cpu number>,...,<cpu number> 719 Format:
720 <cpu number>,...,<cpu number>
721 or
722 <cpu number>-<cpu number> (must be a positive range in ascending order)
723 or a mixture
724 <cpu number>,...,<cpu number>-<cpu number>
717 This option can be used to specify one or more CPUs 725 This option can be used to specify one or more CPUs
718 to isolate from the general SMP balancing and scheduling 726 to isolate from the general SMP balancing and scheduling
719 algorithms. The only way to move a process onto or off 727 algorithms. The only way to move a process onto or off
@@ -1011,6 +1019,10 @@ and is between 256 and 4096 characters. It is defined in the file
1011 emulation library even if a 387 maths coprocessor 1019 emulation library even if a 387 maths coprocessor
1012 is present. 1020 is present.
1013 1021
1022 noaliencache [MM, NUMA] Disables the allcoation of alien caches in
1023 the slab allocator. Saves per-node memory, but will
1024 impact performance on real NUMA hardware.
1025
1014 noalign [KNL,ARM] 1026 noalign [KNL,ARM]
1015 1027
1016 noapic [SMP,APIC] Tells the kernel to not make use of any 1028 noapic [SMP,APIC] Tells the kernel to not make use of any
@@ -1051,9 +1063,14 @@ and is between 256 and 4096 characters. It is defined in the file
1051 in certain environments such as networked servers or 1063 in certain environments such as networked servers or
1052 real-time systems. 1064 real-time systems.
1053 1065
1066 noirqbalance [IA-32,SMP,KNL] Disable kernel irq balancing
1067
1054 noirqdebug [IA-32] Disables the code which attempts to detect and 1068 noirqdebug [IA-32] Disables the code which attempts to detect and
1055 disable unhandled interrupt sources. 1069 disable unhandled interrupt sources.
1056 1070
1071 no_timer_check [IA-32,X86_64,APIC] Disables the code which tests for
1072 broken timer IRQ sources.
1073
1057 noisapnp [ISAPNP] Disables ISA PnP code. 1074 noisapnp [ISAPNP] Disables ISA PnP code.
1058 1075
1059 noinitrd [RAM] Tells the kernel not to load any configured 1076 noinitrd [RAM] Tells the kernel not to load any configured
@@ -1284,6 +1301,7 @@ and is between 256 and 4096 characters. It is defined in the file
1284 Param: "schedule" - profile schedule points. 1301 Param: "schedule" - profile schedule points.
1285 Param: <number> - step/bucket size as a power of 2 for 1302 Param: <number> - step/bucket size as a power of 2 for
1286 statistical time based profiling. 1303 statistical time based profiling.
1304 Param: "sleep" - profile D-state sleeping (millisecs)
1287 1305
1288 processor.max_cstate= [HW,ACPI] 1306 processor.max_cstate= [HW,ACPI]
1289 Limit processor to maximum C-state 1307 Limit processor to maximum C-state
@@ -1365,6 +1383,12 @@ and is between 256 and 4096 characters. It is defined in the file
1365 resume= [SWSUSP] 1383 resume= [SWSUSP]
1366 Specify the partition device for software suspend 1384 Specify the partition device for software suspend
1367 1385
1386 resume_offset= [SWSUSP]
1387 Specify the offset from the beginning of the partition
1388 given by "resume=" at which the swap header is located,
1389 in <PAGE_SIZE> units (needed only for swap files).
1390 See Documentation/power/swsusp-and-swap-files.txt
1391
1368 rhash_entries= [KNL,NET] 1392 rhash_entries= [KNL,NET]
1369 Set number of hash buckets for route cache 1393 Set number of hash buckets for route cache
1370 1394
@@ -1415,6 +1439,11 @@ and is between 256 and 4096 characters. It is defined in the file
1415 1439
1416 scsi_logging= [SCSI] 1440 scsi_logging= [SCSI]
1417 1441
1442 scsi_mod.scan= [SCSI] sync (default) scans SCSI busses as they are
1443 discovered. async scans them in kernel threads,
1444 allowing boot to proceed. none ignores them, expecting
1445 user space to do the scan.
1446
1418 selinux [SELINUX] Disable or enable SELinux at boot time. 1447 selinux [SELINUX] Disable or enable SELinux at boot time.
1419 Format: { "0" | "1" } 1448 Format: { "0" | "1" }
1420 See security/selinux/Kconfig help text. 1449 See security/selinux/Kconfig help text.
@@ -1726,6 +1755,9 @@ and is between 256 and 4096 characters. It is defined in the file
1726 norandmaps Don't use address space randomization 1755 norandmaps Don't use address space randomization
1727 Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space 1756 Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space
1728 1757
1758 unwind_debug=N N > 0 will enable dwarf2 unwinder debugging
1759 This is useful to get more information why
1760 you got a "dwarf2 unwinder stuck"
1729 1761
1730______________________________________________________________________ 1762______________________________________________________________________
1731 1763