Disable PIN 1 of APIC timer
Can be useful to work around chipset bugs.
+ dis_ucode_ldr [X86] Disable the microcode loader.
+
dma_debug=off If the kernel is compiled with DMA_API_DEBUG support,
this option disables the debugging code at boot.
The default parameter value of '0' causes the kernel
not to attempt recovery of lost locks.
+ nfs4.layoutstats_timer =
+ [NFSv4.2] Change the rate at which the kernel sends
+ layoutstats to the pNFS metadata server.
+
+ Setting this to value to 0 causes the kernel to use
+ whatever value is the default set by the layout
+ driver. A non-zero value sets the minimum interval
+ in seconds between layoutstats transmissions.
+
nfsd.nfs4_disable_idmapping=
[NFSv4] When set to the default of '1', the NFSv4
server will return only numeric uids and gids to
in a given burst of a callback-flood test.
rcutorture.fqs_duration= [KNL]
- Set duration of force_quiescent_state bursts.
+ Set duration of force_quiescent_state bursts
+ in microseconds.
rcutorture.fqs_holdoff= [KNL]
- Set holdoff time within force_quiescent_state bursts.
+ Set holdoff time within force_quiescent_state bursts
+ in microseconds.
rcutorture.fqs_stutter= [KNL]
- Set wait time between force_quiescent_state bursts.
+ Set wait time between force_quiescent_state bursts
+ in seconds.
+
+ rcutorture.gp_cond= [KNL]
+ Use conditional/asynchronous update-side
+ primitives, if available.
rcutorture.gp_exp= [KNL]
- Use expedited update-side primitives.
+ Use expedited update-side primitives, if available.
rcutorture.gp_normal= [KNL]
- Use normal (non-expedited) update-side primitives.
- If both gp_exp and gp_normal are set, do both.
- If neither gp_exp nor gp_normal are set, still
- do both.
+ Use normal (non-expedited) asynchronous
+ update-side primitives, if available.
+
+ rcutorture.gp_sync= [KNL]
+ Use normal (non-expedited) synchronous
+ update-side primitives, if available. If all
+ of rcutorture.gp_cond=, rcutorture.gp_exp=,
+ rcutorture.gp_normal=, and rcutorture.gp_sync=
+ are zero, rcutorture acts as if is interpreted
+ they are all non-zero.
rcutorture.n_barrier_cbs= [KNL]
Set callbacks/threads for rcu_barrier() testing.
Set time (s) between CPU-hotplug operations, or
zero to disable CPU-hotplug testing.
- rcutorture.torture_runnable= [BOOT]
- Start rcutorture running at boot time.
-
rcutorture.shuffle_interval= [KNL]
Set task-shuffle interval (s). Shuffling tasks
allows some CPUs to go into dyntick-idle mode
Test RCU's dyntick-idle handling. See also the
rcutorture.shuffle_interval parameter.
+ rcutorture.torture_runnable= [BOOT]
+ Start rcutorture running at boot time.
+
rcutorture.torture_type= [KNL]
Specify the RCU implementation to test.
plus one apbt timer for broadcast timer.
x86_intel_mid_timer=apbt_only | lapic_and_apbt
+ xen_512gb_limit [KNL,X86-64,XEN]
+ Restricts the kernel running paravirtualized under Xen
+ to use only up to 512 GB of RAM. The reason to do so is
+ crash analysis tools and Xen tools for doing domain
+ save/restore/migration must be enabled to handle larger
+ domains.
+
xen_emul_unplug= [HW,X86,XEN]
Unplug Xen emulated devices
Format: [unplug0,][unplug1]