named mounts. Specifying both "all" and "named" disables
all v1 hierarchies.
+ cgroup_favordynmods= [KNL] Enable or Disable favordynmods.
+ Format: { "true" | "false" }
+ Defaults to the value of CONFIG_CGROUP_FAVOR_DYNMODS.
+
cgroup.memory= [KNL] Pass options to the cgroup memory controller.
Format: <string>
nosocket -- Disable socket memory accounting.
earlyprintk=dbgp[debugController#]
earlyprintk=pciserial[,force],bus:device.function[,baudrate]
earlyprintk=xdbc[xhciController#]
+ earlyprintk=bios
earlyprintk is useful when the kernel crashes before
the normal console is initialized. It is not enabled by
The sclp output can only be used on s390.
+ The bios output can only be used on SuperH.
+
The optional "force" to "pciserial" enables use of a
PCI device even when its classcode is not of the
UART class.
See comment before function elanfreq_setup() in
arch/x86/kernel/cpu/cpufreq/elanfreq.c.
- elfcorehdr=[size[KMG]@]offset[KMG] [IA64,PPC,SH,X86,S390]
+ elfcorehdr=[size[KMG]@]offset[KMG] [PPC,SH,X86,S390]
Specifies physical address of start of kernel core
image elf header and optionally the size. Generally
kexec loader will pass this option to capture kernel.
floppy= [HW]
See Documentation/admin-guide/blockdev/floppy.rst.
- force_pal_cache_flush
- [IA-64] Avoid check_sal_cache_flush which may hang on
- buggy SAL_CACHE_FLUSH implementations. Using this
- 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
0 -- machine default
1 -- force brightness inversion
+ ia32_emulation= [X86-64]
+ Format: <bool>
+ When true, allows loading 32-bit programs and executing 32-bit
+ syscalls, essentially overriding IA32_EMULATION_DEFAULT_DISABLED at
+ boot time. When false, unconditionally disables IA32 emulation.
+
icn= [HW,ISDN]
Format: <io>[,<membase>[,<icn_id>[,<icn_id2>]]]
to extract confidential information from the kernel
are also disabled.
+ locktorture.acq_writer_lim= [KNL]
+ Set the time limit in jiffies for a lock
+ acquisition. Acquisitions exceeding this limit
+ will result in a splat once they do complete.
+
+ locktorture.bind_readers= [KNL]
+ Specify the list of CPUs to which the readers are
+ to be bound.
+
+ locktorture.bind_writers= [KNL]
+ Specify the list of CPUs to which the writers are
+ to be bound.
+
+ locktorture.call_rcu_chains= [KNL]
+ Specify the number of self-propagating call_rcu()
+ chains to set up. These are used to ensure that
+ there is a high probability of an RCU grace period
+ in progress at any given time. Defaults to 0,
+ which disables these call_rcu() chains.
+
+ locktorture.long_hold= [KNL]
+ Specify the duration in milliseconds for the
+ occasional long-duration lock hold time. Defaults
+ to 100 milliseconds. Select 0 to disable.
+
+ locktorture.nested_locks= [KNL]
+ Specify the maximum lock nesting depth that
+ locktorture is to exercise, up to a limit of 8
+ (MAX_NESTED_LOCKS). Specify zero to disable.
+ Note that this parameter is ineffective on types
+ of locks that do not support nested acquisition.
+
locktorture.nreaders_stress= [KNL]
Set the number of locking read-acquisition kthreads.
Defaults to being automatically set based on the
Set time (s) between CPU-hotplug operations, or
zero to disable CPU-hotplug testing.
+ locktorture.rt_boost= [KNL]
+ Do periodic testing of real-time lock priority
+ boosting. Select 0 to disable, 1 to boost
+ only rt_mutex, and 2 to boost unconditionally.
+ Defaults to 2, which might seem to be an
+ odd choice, but which should be harmless for
+ non-real-time spinlocks, due to their disabling
+ of preemption. Note that non-realtime mutexes
+ disable boosting.
+
+ locktorture.rt_boost_factor= [KNL]
+ Number that determines how often and for how
+ long priority boosting is exercised. This is
+ scaled down by the number of writers, so that the
+ number of boosts per unit time remains roughly
+ constant as the number of writers increases.
+ On the other hand, the duration of each boost
+ increases with the number of writers.
+
locktorture.shuffle_interval= [KNL]
Set task-shuffle interval (jiffies). Shuffling
tasks allows some CPUs to go into dyntick-idle
locktorture.torture_type= [KNL]
Specify the locking implementation to test.
+ locktorture.verbose= [KNL]
+ Enable additional printk() statements.
+
locktorture.writer_fifo= [KNL]
Run the write-side locktorture kthreads at
sched_set_fifo() real-time priority.
- locktorture.verbose= [KNL]
- Enable additional printk() statements.
-
logibm.irq= [HW,MOUSE] Logitech Bus Mouse Driver
Format: <irq>
mga= [HW,DRM]
+ microcode.force_minrev= [X86]
+ Format: <bool>
+ Enable or disable the microcode minimal revision
+ enforcement for the runtime microcode loader.
+
min_addr=nn[KMG] [KNL,BOOT,IA-64] All physical memory below this
physical address is ignored.
Set maximum number of finished RCU callbacks to
process in one batch.
+ rcutree.do_rcu_barrier= [KNL]
+ Request a call to rcu_barrier(). This is
+ throttled so that userspace tests can safely
+ hammer on the sysfs variable if they so choose.
+ If triggered before the RCU grace-period machinery
+ is fully active, this will error out with EAGAIN.
+
rcutree.dump_tree= [KNL]
Dump the structure of the rcu_node combining tree
out at early boot. This is used for diagnostic
test until boot completes in order to avoid
interference.
+ refscale.lookup_instances= [KNL]
+ Number of data elements to use for the forms of
+ SLAB_TYPESAFE_BY_RCU testing. A negative number
+ is negated and multiplied by nr_cpu_ids, while
+ zero specifies nr_cpu_ids.
+
refscale.loops= [KNL]
Set the number of loops over the synchronization
primitive under test. Increasing this number
This feature may be more efficiently disabled
using the csdlock_debug- kernel parameter.
+ smp.panic_on_ipistall= [KNL]
+ If a csd_lock_timeout extends for more than
+ the specified number of milliseconds, panic the
+ system. By default, let CSD-lock acquisition
+ take as long as they take. Specifying 300,000
+ for this value provides a 5-minute timeout.
+
smsc-ircc2.nopnp [HW] Don't use PNP to discover SMC devices
smsc-ircc2.ircc_cfg= [HW] Device configuration I/O port
smsc-ircc2.ircc_sir= [HW] SIR base I/O port
projects / linux-2.6-block.git / blobdiff