Steven Rostedt db4c75cbeb tracing: Fix stacktrace of latency tracers (irqsoff and friends) ... While debugging a latency with someone on IRC (mirage335) on #linux-rt (OFTC), we discovered that the stacktrace output of the latency tracers (preemptirqsoff) was empty. This bug was caused by the creation of the dynamic length stack trace again (like commit 12b5da3 "tracing: Fix ent_size in trace output" was). This bug is caused by the latency tracers requiring the next event to determine the time between the current event and the next. But by grabbing the next event, the iter->ent_size is set to the next event instead of the current one. As the stacktrace event is the last event, this makes the ent_size zero and causes nothing to be printed for the stack trace. The dynamic stacktrace uses the ent_size to determine how much of the stack can be printed. The ent_size of zero means no stack. The simple fix is to save the iter->ent_size before finding the next event. Note, mirage335 asked to remain anonymous from LKML and git, so I will not add the Reported-by and Tested-by tags, even though he did report the issue and tested the fix. Cc: stable@vger.kernel.org # 3.1+ Signed-off-by: Steven Rostedt <rostedt@goodmis.org>		2012-04-19 17:00:13 -04:00
..
blktrace.c	simple_open: automatically convert to simple_open()	2012-04-05 15:25:50 -07:00
ftrace.c	ftrace: Fix function_graph for archs that test ftrace_trace_function	2012-03-13 15:07:37 -04:00
Kconfig	tracing: Do not select FRAME_POINTER on PPC	2012-02-27 08:45:11 -05:00
Makefile	Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2011-10-26 17:03:38 +02:00
power-traces.c
ring_buffer.c	tracing/ring-buffer: Only have tracing_on disable tracing buffers	2012-02-22 15:50:28 -05:00
ring_buffer_benchmark.c
rpm-traces.c
trace.c	tracing: Fix regression with tracing_on	2012-04-16 15:41:28 -04:00
trace.h	tracing: Fix build breakage without CONFIG_PERF_EVENTS (again)	2012-04-13 21:37:04 -04:00
trace_branch.c
trace_clock.c
trace_entries.h	Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/urgent	2012-03-24 08:19:09 +01:00
trace_event_perf.c	ftrace, perf: Add filter support for function trace event	2012-02-21 11:08:30 -05:00
trace_events.c	ftrace, perf: Add add/del tracepoint perf registration actions	2012-02-21 11:08:25 -05:00
trace_events_filter.c	ftrace, perf: Add filter support for function trace event	2012-02-21 11:08:30 -05:00
trace_events_filter_test.h
trace_export.c	Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/urgent	2012-03-24 08:19:09 +01:00
trace_functions.c
trace_functions_graph.c
trace_irqsoff.c	Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core	2011-11-11 08:19:37 +01:00
trace_kdb.c
trace_kprobe.c	ftrace, perf: Add add/del tracepoint perf registration actions	2012-02-21 11:08:25 -05:00
trace_mmiotrace.c
trace_nop.c
trace_output.c	tracing: Fix stacktrace of latency tracers (irqsoff and friends)	2012-04-19 17:00:13 -04:00
trace_output.h
trace_printk.c
trace_sched_switch.c
trace_sched_wakeup.c	tracing/latency: Fix header output for latency tracers	2011-11-07 13:48:35 -05:00
trace_selftest.c
trace_selftest_dynamic.c
trace_stack.c	tracing: Have stack tracing set filtered functions at boot	2011-12-21 07:26:49 -05:00
trace_stat.c
trace_stat.h
trace_syscalls.c	ftrace, perf: Add add/del tracepoint perf registration actions	2012-02-21 11:08:25 -05:00
trace_workqueue.c