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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
57 	tristate "Scalability tests for read-side synchronization (RCU and others)"
63 	  useful comparing RCU with various read-side synchronization mechanisms.
64 	  The kernel module may be built after the fact on the running kernel to be
67 	  Say Y here if you want these performance tests built into the kernel.
72 	int "RCU CPU stall timeout in seconds"
83 	int "Expedited RCU CPU stall timeout in milliseconds"
109 	bool "Provide RCU CPU-stall notifiers"
117 	  Enable RCU CPU-stall notifiers, which are invoked just before
118 	  printing the RCU CPU stall warning.  As such, bugs in notifier
124 	  that the whole reason that the RCU CPU stall is happening in
126 	  that you are thinking of acquiring.  In which case, having your
139 	  This option enables additional tracepoints for ftrace-style
149 	  This option provides consistency checks in RCU's handling of
150 	  NO_HZ.  These checks have proven quite helpful in detecting
151 	  bugs in arch-specific NO_HZ code.
164 	  scalability, destroys real-time response, degrades battery
166 	  machines, as in systems with more than about 10 or 20 CPUs.
167 	  But in conjunction with tools like KASAN, it can be helpful
169 	  too-short RCU read-side critical sections.