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Commit ae91aa0a authored by Paul E. McKenney's avatar Paul E. McKenney
Browse files

rcu: Remove debugfs tracing 



RCU's debugfs tracing used to be the only reasonable low-level debug
information available, but ftrace and event tracing has since surpassed
the RCU debugfs level of usefulness.  This commit therefore removes
RCU's debugfs tracing.

Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
parent bd8cc5a0

Documentation/RCU/00-INDEX

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@@ -28,8 +28,6 @@ stallwarn.txt 
	- RCU CPU stall warnings (module parameter rcu_cpu_stall_suppress)

torture.txt

	- RCU Torture Test Operation (CONFIG_RCU_TORTURE_TEST)

trace.txt

	- CONFIG_RCU_TRACE debugfs files and formats

UP.txt

	- RCU on Uniprocessor Systems

whatisRCU.txt

Documentation/RCU/Design/Requirements/Requirements.html

+1 −1
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@@ -2034,7 +2034,7 @@ guard against mishaps and misuse: 
	some other synchronization mechanism, for example, reference

	counting.

<li>	In kernels built with <tt>CONFIG_RCU_TRACE=y</tt>, RCU-related

	information is provided via both debugfs and event tracing.

	information is provided via event tracing.

<li>	Open-coded use of <tt>rcu_assign_pointer()</tt> and

	<tt>rcu_dereference()</tt> to create typical linked

	data structures can be surprisingly error-prone.

Documentation/RCU/trace.txt

deleted100644 → 0
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File deleted.

Preview size limit exceeded, changes collapsed.

init/Kconfig

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@@ -659,14 +659,6 @@ config RCU_FAST_NO_HZ 


	  Say N if you are unsure.



config TREE_RCU_TRACE

	def_bool RCU_TRACE && ( TREE_RCU || PREEMPT_RCU )

	select DEBUG_FS

	help

	  This option provides tracing for the TREE_RCU and

	  PREEMPT_RCU implementations, permitting Makefile to

	  trivially select kernel/rcutree_trace.c.



config RCU_BOOST

	bool "Enable RCU priority boosting"

	depends on RT_MUTEXES && PREEMPT_RCU && RCU_EXPERT

kernel/rcu/Makefile

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@@ -9,6 +9,5 @@ obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o 
obj-$(CONFIG_RCU_PERF_TEST) += rcuperf.o

obj-$(CONFIG_TREE_RCU) += tree.o

obj-$(CONFIG_PREEMPT_RCU) += tree.o

obj-$(CONFIG_TREE_RCU_TRACE) += tree_trace.o

obj-$(CONFIG_TINY_RCU) += tiny.o

obj-$(CONFIG_RCU_NEED_SEGCBLIST) += rcu_segcblist.o