These patches add trace events support for preempt and irq disable/enable events.
Changes since v5: - Use trace_*_rcuidle variants (thanks Steve!) Here's an example of how Android's systrace will be using it to show critical sections as a gantt chart: http://imgur.com/download/TZplEVp Links to earlier series: v5: https://lkml.org/lkml/2017/9/12/507 v4: https://lkml.org/lkml/2017/9/6/724 v3: https://lkml.org/lkml/2017/9/3/15 Joel Fernandes (2): tracing: Prepare to add preempt and irq trace events tracing: Add support for preempt and irq enable/disable events include/linux/ftrace.h | 3 +- include/linux/irqflags.h | 4 +- include/trace/events/preemptirq.h | 66 ++++++++++++++ kernel/trace/Kconfig | 9 ++ kernel/trace/Makefile | 1 + kernel/trace/trace_irqsoff.c | 176 +++++++++++++++++++++++++++++++------- 6 files changed, 226 insertions(+), 33 deletions(-) create mode 100644 include/trace/events/preemptirq.h Cc: Steven Rostedt <rost...@goodmis.org> Cc: Peter Zilstra <pet...@infradead.org> -- 2.14.1.821.g8fa685d3b7-goog
