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1 # SPDX-License-Identifier: GPL-2.0-only
3 # RCU-related debugging configuration options
19 	  false-positive splats, we keep it default disabled but once all
33 	  tests on the RCU infrastructure.  The kernel module may be built
36 	  Say Y here if you want RCU performance tests to be built into
48 	  on the RCU infrastructure.  The kernel module may be built
51 	  Say Y here if you want RCU torture tests to be built into
63 	  Note that PREEMPT_COUNT must be enabled if the preempt-disabled
64 	  and bh-disabled checks are to take effect, and that PREEMPT_RCU
65 	  must be enabled for the RCU-nesting checks to take effect.
78 	  log of failure/close-call rcutorture reader segments with the
88 	tristate "Scalability tests for read-side synchronization (RCU and others)"
94 	  useful comparing RCU with various read-side synchronization mechanisms.
95 	  The kernel module may be built after the fact on the running kernel to be
98 	  Say Y here if you want these performance tests built into the kernel.
103 	int "RCU CPU stall timeout in seconds"
114 	int "Expedited RCU CPU stall timeout in milliseconds"
140 	bool "Provide RCU CPU-stall notifiers"
148 	  Enable RCU CPU-stall notifiers, which are invoked just before
149 	  printing the RCU CPU stall warning.  As such, bugs in notifier
155 	  that the whole reason that the RCU CPU stall is happening in
157 	  that you are thinking of acquiring.  In which case, having your
170 	  This option enables additional tracepoints for ftrace-style
180 	  This option provides consistency checks in RCU's handling of
181 	  NO_HZ.  These checks have proven quite helpful in detecting
182 	  bugs in arch-specific NO_HZ code.
195 	  scalability, destroys real-time response, degrades battery
197 	  machines, as in systems with more than about 10 or 20 CPUs.
198 	  But in conjunction with tools like KASAN, it can be helpful
200 	  too-short RCU read-side critical sections.