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Steven Rostedt (Red Hat) 2c4a33aba5 tracing: Fix traceon trigger condition to actually turn tracing on 
While working on my tutorial for 2014 Linux Collaboration Summit
I found that the traceon trigger did not work when conditions were
used. The other triggers worked fine though. Looking into it, it
is because of the way the triggers use the ring buffer to store
the fields it will use for the condition. But if tracing is off, nothing
is stored in the buffer, and the tracepoint exits before calling the
trigger to test the condition. This is fine for all the triggers that
only work when tracing is on, but for traceon trigger that is to
work when tracing is off, nothing happens.

The fix is simple, just use a temp ring buffer to record the event
if tracing is off and the event has a trace event conditional trigger
enabled. The rest of the tracepoint code will work just fine, but
the tracepoint wont be recorded in the other buffers.

Cc: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
 		2014-03-25 23:39:41 -04:00
..
Kconfig ring-buffer: Select IRQ_WORK 2013-05-03 19:24:17 -04:00
Makefile tracing: Add basic event trigger framework 2013-12-20 18:40:22 -05:00
blktrace.c block: Abstract out bvec iterator 2013-11-23 22:33:47 -08:00
ftrace.c This pull request has a new feature to ftrace, namely the trace event 2014-01-22 16:35:21 -08:00
power-traces.c PM / tracing: remove deprecated power trace API 2013-01-26 00:39:12 +01:00
ring_buffer.c ring-buffer: Fix first commit on sub-buffer having non-zero delta 2014-02-11 13:38:54 -05:00
ring_buffer_benchmark.c tracing: Use NUMA allocation for per-cpu ring buffer pages 2011-06-14 22:04:39 -04:00
rpm-traces.c PM / Runtime: Introduce trace points for tracing rpm_* functions 2011-09-27 22:53:27 +02:00
trace.c tracing: Fix traceon trigger condition to actually turn tracing on 2014-03-25 23:39:41 -04:00
trace.h tracing: Fix rcu handling of event_trigger_data filter field 2014-01-02 16:17:22 -05:00
trace_branch.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_clock.c tracing: Add "uptime" trace clock that uses jiffies 2013-03-15 00:36:09 -04:00
trace_entries.h tracing: Add trace_puts() for even faster trace_printk() tracing 2013-03-15 00:35:55 -04:00
trace_event_perf.c perf/trace: Properly use u64 to hold event_id 2013-11-19 16:57:44 +01:00
trace_events.c tracing: Fix array size mismatch in format string 2014-03-20 13:21:05 -04:00
trace_events_filter.c tracing: Add and use generic set_trigger_filter() implementation 2013-12-21 22:02:17 -05:00
trace_events_filter_test.h tracing/filter: Add startup tests for events filter 2011-08-19 14:35:59 -04:00
trace_events_trigger.c tracing: Show available event triggers when no trigger is set 2014-01-09 21:20:32 -05:00
trace_export.c tracing: Fix array size mismatch in format string 2014-03-20 13:21:05 -04:00
trace_functions.c tracing: Add ref_data to function and fgraph tracer structs 2013-07-18 21:31:31 -04:00
trace_functions_graph.c tracing: Do not use signed enums with unsigned long long in fgragh output 2013-11-06 15:26:56 -05:00
trace_irqsoff.c tracing: Use flag buffer_disabled for irqsoff tracer 2013-07-01 20:34:28 -04:00
trace_kdb.c tracing: Consolidate max_tr into main trace_array structure 2013-03-15 00:35:40 -04:00
trace_kprobe.c tracing: Consolidate event trigger code 2014-01-09 21:20:07 -05:00
trace_mmiotrace.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_nop.c tracing/ftrace: make nop-tracer use polling wait for events on pipe 2009-03-23 09:22:15 +01:00
trace_output.c ftrace, sched: Add TRACE_FLAG_PREEMPT_RESCHED 2013-11-11 12:43:39 +01:00
trace_output.h tracing: Rename trace_event_mutex to trace_event_sem 2013-03-15 13:22:10 -04:00
trace_printk.c tracing: Add __tracepoint_string() to export string pointers 2013-07-26 13:39:44 -04:00
trace_probe.c tracing/uprobes: Add @+file_offset fetch method 2014-01-02 20:57:05 -05:00
trace_probe.h tracing/probes: Fix build break on !CONFIG_KPROBE_EVENT 2014-01-03 15:27:18 -05:00
trace_sched_switch.c tracing: Update event filters for multibuffer 2013-11-05 16:50:20 -05:00
trace_sched_wakeup.c sched/deadline: Add SCHED_DEADLINE inheritance logic 2014-01-13 13:42:56 +01:00
trace_selftest.c sched/deadline: Add latency tracing for SCHED_DEADLINE tasks 2014-01-13 13:41:11 +01:00
trace_selftest_dynamic.c ftrace: Add self-tests for multiple function trace users 2011-05-18 19:24:51 -04:00
trace_stack.c tracing: Add generic tracing_lseek() function 2014-01-02 16:17:12 -05:00
trace_stat.c trace/trace_stat: use rbtree postorder iteration helper instead of opencoding 2013-11-05 16:01:47 -05:00
trace_stat.h tracing/stat: Add stat_release() callback 2009-07-10 12:14:05 +02:00
trace_syscalls.c tracing: Consolidate event trigger code 2014-01-09 21:20:07 -05:00
trace_uprobe.c tracing/probes: Fix build break on !CONFIG_KPROBE_EVENT 2014-01-03 15:27:18 -05:00