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doc: Catch-up update for locktorture module parameters

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This commit documents recently added locktorture module parameters.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Joel Fernandes <joel@joelfernandes.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
This commit is contained in:
Paul E. McKenney
2023-08-21 20:17:26 -07:00
committed by Frederic Weisbecker
parent 7f993623e9
commit b1326d766b
1 changed files with 47 additions and 3 deletions
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Documentation/admin-guide/kernel-parameters.txt
+47 -3
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@@ -2913,6 +2913,11 @@
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.call_rcu_chains= [KNL]
Specify the number of self-propagating call_rcu()
chains to set up. These are used to ensure that
@@ -2920,6 +2925,18 @@
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
@@ -2935,6 +2952,29 @@
Set time (s) between CPU-hotplug operations, or
zero to disable CPU-hotplug testing.
locktorture.readers_bind= [KNL]
Specify the list of CPUs to which the readers are
to be bound.
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
@@ -2957,13 +2997,17 @@
locktorture.torture_type= [KNL]
Specify the locking implementation to test.
locktorture.verbose= [KNL]
Enable additional printk() statements.
locktorture.writers_bind= [KNL]
Specify the list of CPUs to which the writers are
to be bound.
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>