diff options
Diffstat (limited to 'Documentation/admin-guide/kernel-parameters.txt')
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 80 |
1 files changed, 79 insertions, 1 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 8f75ec177399..07e22ba5bfe3 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -458,6 +458,9 @@ arm64.nomops [ARM64] Unconditionally disable Memory Copy and Memory Set instructions support + arm64.nompam [ARM64] Unconditionally disable Memory Partitioning And + Monitoring support + arm64.nomte [ARM64] Unconditionally disable Memory Tagging Extension support @@ -1828,6 +1831,13 @@ lz4: Select LZ4 compression algorithm to compress/decompress hibernation image. + hibernate.pm_test_delay= + [HIBERNATION] + Sets the number of seconds to remain in a hibernation test + mode before resuming the system (see + /sys/power/pm_test). Only available when CONFIG_PM_DEBUG + is set. Default value is 5. + highmem=nn[KMG] [KNL,BOOT,EARLY] forces the highmem zone to have an exact size of <nn>. This works even on boxes that have no highmem otherwise. This also works to reduce highmem @@ -2742,6 +2752,31 @@ kgdbwait [KGDB,EARLY] Stop kernel execution and enter the kernel debugger at the earliest opportunity. + kho= [KEXEC,EARLY] + Format: { "0" | "1" | "off" | "on" | "y" | "n" } + Enables or disables Kexec HandOver. + "0" | "off" | "n" - kexec handover is disabled + "1" | "on" | "y" - kexec handover is enabled + + kho_scratch= [KEXEC,EARLY] + Format: ll[KMG],mm[KMG],nn[KMG] | nn% + Defines the size of the KHO scratch region. The KHO + scratch regions are physically contiguous memory + ranges that can only be used for non-kernel + allocations. That way, even when memory is heavily + fragmented with handed over memory, the kexeced + kernel will always have enough contiguous ranges to + bootstrap itself. + + It is possible to specify the exact amount of + memory in the form of "ll[KMG],mm[KMG],nn[KMG]" + where the first parameter defines the size of a low + memory scratch area, the second parameter defines + the size of a global scratch area and the third + parameter defines the size of additional per-node + scratch areas. The form "nn%" defines scale factor + (in percents) of memory that was used during boot. + kmac= [MIPS] Korina ethernet MAC address. Configure the RouterBoard 532 series on-chip Ethernet adapter MAC address. @@ -5672,6 +5707,31 @@ are zero, rcutorture acts as if is interpreted they are all non-zero. + rcutorture.gpwrap_lag= [KNL] + Enable grace-period wrap lag testing. Setting + to false prevents the gpwrap lag test from + running. Default is true. + + rcutorture.gpwrap_lag_gps= [KNL] + Set the value for grace-period wrap lag during + active lag testing periods. This controls how many + grace periods differences we tolerate between + rdp and rnp's gp_seq before setting overflow flag. + The default is always set to 8. + + rcutorture.gpwrap_lag_cycle_mins= [KNL] + Set the total cycle duration for gpwrap lag + testing in minutes. This is the total time for + one complete cycle of active and inactive + testing periods. Default is 30 minutes. + + rcutorture.gpwrap_lag_active_mins= [KNL] + Set the duration for which gpwrap lag is active + within each cycle, in minutes. During this time, + the grace-period wrap lag will be set to the + value specified by gpwrap_lag_gps. Default is + 5 minutes. + rcutorture.irqreader= [KNL] Run RCU readers from irq handlers, or, more accurately, from a timer handler. Not all RCU @@ -6268,7 +6328,7 @@ port and the regular usb controller gets disabled. root= [KNL] Root filesystem - Usually this a a block device specifier of some kind, + Usually this is a block device specifier of some kind, see the early_lookup_bdev comment in block/early-lookup.c for details. Alternatively this can be "ram" for the legacy initial @@ -6295,6 +6355,11 @@ Memory area to be used by remote processor image, managed by CMA. + rt_group_sched= [KNL] Enable or disable SCHED_RR/FIFO group scheduling + when CONFIG_RT_GROUP_SCHED=y. Defaults to + !CONFIG_RT_GROUP_SCHED_DEFAULT_DISABLED. + Format: <bool> + rw [KNL] Mount root device read-write on boot S [KNL] Run init in single mode @@ -7423,6 +7488,19 @@ having this key zero'ed is acceptable. E.g. in testing scenarios. + tsa= [X86] Control mitigation for Transient Scheduler + Attacks on AMD CPUs. Search the following in your + favourite search engine for more details: + + "Technical guidance for mitigating transient scheduler + attacks". + + off - disable the mitigation + on - enable the mitigation (default) + user - mitigate only user/kernel transitions + vm - mitigate only guest/host transitions + + tsc= Disable clocksource stability checks for TSC. Format: <string> [x86] reliable: mark tsc clocksource as reliable, this |