[PATCHv2 0/4] tracing: function graph output for preempt/irqs-off tracers

[Jiri Olsa <jolsa@redhat.com>]

hi,

I'm sending reworked version of the graph output support for
preemptirqsoff/preemptoff/irqsoff tracers.

I made the graph output as an output event, so it could be shared
within tracers - patch 1/4.

I also added raw trace output for graph tracer. I have this one around
for long time and it was quite handy for investigating graph tracer issues.
(patch 4/4)

attached patches:
- 1/4 adding ftrace events for graph tracer
- 2/4 graph output support for irqsoff tracer
- 3/4 graph output support for preemptirqsoff/preemptoff tracers
- 4/4 raw output for graph tracer

v2 changes:
- keeping the current function graph output format


wbr,
jirka
---
 kernel/trace/trace.c                 |    2 +-
 kernel/trace/trace.h                 |   15 ++--
 kernel/trace/trace_functions_graph.c |  124 +++++++++++++++++++++----
 kernel/trace/trace_irqsoff.c         |  174 ++++++++++++++++++++++++++++++++--
 4 files changed, 283 insertions(+), 32 deletions(-)