possible to determine what the correct size should be.
This option provides an override for these situations.
+ carrier_timeout=
+ [NET] Specifies amount of time (in seconds) that
+ the kernel should wait for a network carrier. By default
+ it waits 120 seconds.
+
ca_keys= [KEYS] This parameter identifies a specific key(s) on
the system trusted keyring to be used for certificate
trust validation.
The filter can be disabled or changed to another
driver later using sysfs.
+ driver_async_probe= [KNL]
+ List of driver names to be probed asynchronously.
+ Format: <driver_name1>,<driver_name2>...
+
drm.edid_firmware=[<connector>:]<file>[,[<connector>:]<file>]
Broken monitors, graphic adapters, KVMs and EDIDless
panels may send no or incorrect EDID data sets.
specified address. The serial port must already be
setup and configured. Options are not yet supported.
+ efifb,[options]
+ Start an early, unaccelerated console on the EFI
+ memory mapped framebuffer (if available). On cache
+ coherent non-x86 systems that use system memory for
+ the framebuffer, pass the 'ram' option so that it is
+ mapped with the correct attributes.
+
earlyprintk= [X86,SH,ARM,M68k,S390]
earlyprintk=vga
- earlyprintk=efi
earlyprintk=sclp
earlyprintk=xen
earlyprintk=serial[,ttySn[,baudrate]]
arch/x86/kernel/cpu/cpufreq/elanfreq.c.
elevator= [IOSCHED]
- Format: {"cfq" | "deadline" | "noop"}
- See Documentation/block/cfq-iosched.txt and
- Documentation/block/deadline-iosched.txt for details.
+ Format: { "mq-deadline" | "kyber" | "bfq" }
+ See Documentation/block/deadline-iosched.txt,
+ Documentation/block/kyber-iosched.txt and
+ Documentation/block/bfq-iosched.txt for details.
elfcorehdr=[size[KMG]@]offset[KMG] [IA64,PPC,SH,X86,S390]
Specifies physical address of start of kernel core
By default, super page will be supported if Intel IOMMU
has the capability. With this option, super page will
not be supported.
- sm_off [Default Off]
- By default, scalable mode will be supported if the
+ sm_on [Default Off]
+ By default, scalable mode will be disabled even if the
hardware advertises that it has support for the scalable
mode translation. With this option set, scalable mode
- will not be used even on hardware which claims to support
- it.
+ will be used on hardware which claims to support it.
tboot_noforce [Default Off]
Do not force the Intel IOMMU enabled under tboot.
By default, tboot will force Intel IOMMU on, which
Built with CONFIG_DEBUG_KMEMLEAK_DEFAULT_OFF=y,
the default is off.
+ kpti= [ARM64] Control page table isolation of user
+ and kernel address spaces.
+ Default: enabled on cores which need mitigation.
+ 0: force disabled
+ 1: force enabled
+
kvm.ignore_msrs=[KVM] Ignore guest accesses to unhandled MSRs.
Default is 0 (don't ignore, but inject #GP)
lsm.debug [SECURITY] Enable LSM initialization debugging output.
+ lsm=lsm1,...,lsmN
+ [SECURITY] Choose order of LSM initialization. This
+ overrides CONFIG_LSM, and the "security=" parameter.
+
machvec= [IA-64] Force the use of a particular machine-vector
(machvec) in a generic kernel.
Example: machvec=hpzx1_swiotlb
latencies, which will choose a value aligned
with the appropriate hardware boundaries.
- rcutree.jiffies_till_sched_qs= [KNL]
- Set required age in jiffies for a
- given grace period before RCU starts
- soliciting quiescent-state help from
- rcu_note_context_switch(). If not specified, the
- kernel will calculate a value based on the most
- recent settings of rcutree.jiffies_till_first_fqs
- and rcutree.jiffies_till_next_fqs.
- This calculated value may be viewed in
- rcutree.jiffies_to_sched_qs. Any attempt to
- set rcutree.jiffies_to_sched_qs will be
- cheerfully overwritten.
-
rcutree.jiffies_till_first_fqs= [KNL]
Set delay from grace-period initialization to
first attempt to force quiescent states.
quiescent states. Units are jiffies, minimum
value is one, and maximum value is HZ.
+ rcutree.jiffies_till_sched_qs= [KNL]
+ Set required age in jiffies for a
+ given grace period before RCU starts
+ soliciting quiescent-state help from
+ rcu_note_context_switch() and cond_resched().
+ If not specified, the kernel will calculate
+ a value based on the most recent settings
+ of rcutree.jiffies_till_first_fqs
+ and rcutree.jiffies_till_next_fqs.
+ This calculated value may be viewed in
+ rcutree.jiffies_to_sched_qs. Any attempt to set
+ rcutree.jiffies_to_sched_qs will be cheerfully
+ overwritten.
+
rcutree.kthread_prio= [KNL,BOOT]
Set the SCHED_FIFO priority of the RCU per-CPU
kthreads (rcuc/N). This value is also used for
This wake_up() will be accompanied by a
WARN_ONCE() splat and an ftrace_dump().
+ rcutree.sysrq_rcu= [KNL]
+ Commandeer a sysrq key to dump out Tree RCU's
+ rcu_node tree with an eye towards determining
+ why a new grace period has not yet started.
+
rcuperf.gp_async= [KNL]
Measure performance of asynchronous
grace-period primitives such as call_rcu().
Note: increases power consumption, thus should only be
enabled if running jitter sensitive (HPC/RT) workloads.
- security= [SECURITY] Choose a security module to enable at boot.
- If this boot parameter is not specified, only the first
- security module asking for security registration will be
- loaded. An invalid security module name will be treated
- as if no module has been chosen.
+ security= [SECURITY] Choose a legacy "major" security module to
+ enable at boot. This has been deprecated by the
+ "lsm=" parameter.
selinux= [SELINUX] Disable or enable SELinux at boot time.
Format: { "0" | "1" }
usbcore.authorized_default=
[USB] Default USB device authorization:
(default -1 = authorized except for wireless USB,
- 0 = not authorized, 1 = authorized)
+ 0 = not authorized, 1 = authorized, 2 = authorized
+ if device connected to internal port)
usbcore.autosuspend=
[USB] The autosuspend time delay (in seconds) used