Steven Rostedt (VMware) 1a149d7d3f ring-buffer: Rewrite trace_recursive_(un)lock() to be simpler ... The current method to prevent the ring buffer from entering into a recursize loop is to use a bitmask and set the bit that maps to the current context (normal, softirq, irq or NMI), and if that bit was already set, it is considered a recursive loop. New code is being added that may require the ring buffer to be entered a second time in the current context. The recursive locking prevents that from happening. Instead of mapping a bitmask to the current context, just allow 4 levels of nesting in the ring buffer. This matches the 4 context levels that it can already nest. It is highly unlikely to have more than two levels, thus it should be fine when we add the second entry into the ring buffer. If that proves to be a problem, we can always up the number to 8. An added benefit is that reading preempt_count() to get the current level adds a very slight but noticeable overhead. This removes that need. Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>		2017-10-04 11:36:58 -04:00
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blktrace.c	blktrace: Fix potential deadlock between delete & sysfs ops	2017-09-25 08:56:05 -06:00
bpf_trace.c	bpf: fix bpf_trace_printk on 32 bit archs	2017-08-15 17:32:15 -07:00
ftrace.c	ftrace: Fix memleak when unregistering dynamic ops when tracing disabled	2017-09-01 13:55:49 -04:00
Kconfig	tracing: Rename update the enum_map file	2017-06-13 17:13:06 -04:00
Makefile	perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS	2017-03-01 10:26:39 +01:00
power-traces.c	cpufreq: schedutil: New governor based on scheduler utilization data	2016-04-02 01:09:12 +02:00
ring_buffer_benchmark.c	ring-buffer: Have ring_buffer_alloc_read_page() return error on offline CPU	2017-08-02 14:23:02 -04:00
ring_buffer.c	ring-buffer: Rewrite trace_recursive_(un)lock() to be simpler	2017-10-04 11:36:58 -04:00
rpm-traces.c
trace_benchmark.c	tracing: Have the trace_event benchmark thread call cond_resched_rcu_qs()	2017-04-17 15:21:19 -04:00
trace_benchmark.h	tracing: Have the reg function allow to fail	2016-12-09 09:13:30 -05:00
trace_branch.c	tracing: Add the constant count for branch tracer	2017-01-19 08:57:41 -05:00
trace_clock.c	sched/headers: Prepare for new header dependencies before moving code to <linux/sched/clock.h>	2017-03-02 08:42:27 +01:00
trace_entries.h	trace: make trace_hwlat timestamp y2038 safe	2017-05-08 17:15:15 -07:00
trace_event_perf.c	perf/ftrace: Fix double traces of perf on ftrace:function	2017-08-29 13:29:29 +02:00
trace_events_filter_test.h
trace_events_filter.c	mm: treewide: remove GFP_TEMPORARY allocation flag	2017-09-13 18:53:16 -07:00
trace_events_hist.c	tracing: Remove redundant unread variable ret	2017-10-04 11:36:55 -04:00
trace_events_trigger.c	sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h>	2017-03-02 08:42:38 +01:00
trace_events.c	tracing: Reverse the order of trace_types_lock and event_mutex	2017-10-04 11:36:56 -04:00
trace_export.c	tracing: ftrace_event_is_function() can return boolean	2015-11-02 14:28:05 -05:00
trace_functions_graph.c	treewide: make "nr_cpu_ids" unsigned	2017-09-08 18:26:48 -07:00
trace_functions.c	ftrace: Fix regression with module command in stack_trace_filter	2017-06-29 10:05:45 -04:00
trace_hwlat.c	trace: make trace_hwlat timestamp y2038 safe	2017-05-08 17:15:15 -07:00
trace_irqsoff.c	clocksource: Use a plain u64 instead of cycle_t	2016-12-25 11:04:12 +01:00
trace_kdb.c	tracing: Move trace_flags from global to a trace_array field	2015-09-30 15:22:55 -04:00
trace_kprobe.c	perf/ftrace: Fix double traces of perf on ftrace:function	2017-08-29 13:29:29 +02:00
trace_mmiotrace.c	tracing: Ignore mmiotrace from kernel commandline	2017-09-19 12:36:01 -04:00
trace_nop.c	tracing: Fix typoes in code comment and printk in trace_nop.c	2016-03-08 11:23:57 -05:00
trace_output.c	sched/tracing: Use common task-state helpers	2017-09-29 11:02:45 +02:00
trace_output.h	tracing: Turn seq_print_user_ip() into a static function	2015-09-28 10:16:12 -04:00
trace_printk.c	tracing: Handle NULL formats in hold_module_trace_bprintk_format()	2016-06-20 09:46:12 -04:00
trace_probe.c	tracing/probes: Fix a warning message to show correct maximum length	2017-02-15 10:32:48 -05:00
trace_probe.h	perf/core: Rename CONFIG_[UK]PROBE_EVENT to CONFIG_[UK]PROBE_EVENTS	2017-03-01 10:26:39 +01:00
trace_sched_switch.c	tracing: Add support for recording tgid of tasks	2017-06-27 13:30:28 -04:00
trace_sched_wakeup.c	sched/tracing: Use common task-state helpers	2017-09-29 11:02:45 +02:00
trace_selftest_dynamic.c
trace_selftest.c	tracing: Remove obsolete sched_switch tracer selftest	2017-10-04 11:36:54 -04:00
trace_seq.c	tracing: use %*pb[l] to print bitmaps including cpumasks and nodemasks	2015-02-13 21:21:37 -08:00
trace_stack.c	tracing: Remove RCU work arounds from stack tracer	2017-09-23 16:50:20 -04:00
trace_stat.c	kernel/...: convert pr_warning to pr_warn	2016-03-22 15:36:02 -07:00
trace_stat.h
trace_syscalls.c	perf/bpf: fix a clang compilation issue	2017-09-11 14:28:45 -07:00
trace_uprobe.c	perf/ftrace: Fix double traces of perf on ftrace:function	2017-08-29 13:29:29 +02:00
trace.c	tracing: Reverse the order of trace_types_lock and event_mutex	2017-10-04 11:36:56 -04:00
trace.h	tracing: Remove obsolete sched_switch tracer selftest	2017-10-04 11:36:54 -04:00
tracing_map.c	tracing: Fix kmemleak in tracing_map_array_free()	2017-08-24 10:05:51 -04:00
tracing_map.h	tracing: Update some tracing_map constants and comments	2016-04-19 12:16:06 -04:00