These patches add trace events support for preempt and irq disable/enable events. This version has few changes suggested by Steven as well.
I am looking forward to getting these accepted for v4.15 if possible. I based it on Linus's master, please let me know if there is another branch I need to rebase on. thanks! Changes since v4: - Use static inline instead of defines for tracer functions. - Moved new per-cpu variables to protect from recursion to the correct defines. - Dropped bug fix patch (3/3) not related to series and will submit that separately. 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: 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 | 62 ++++++++++++++ kernel/trace/Kconfig | 9 ++ kernel/trace/Makefile | 1 + kernel/trace/trace_irqsoff.c | 176 +++++++++++++++++++++++++++++++------- 6 files changed, 222 insertions(+), 33 deletions(-) create mode 100644 include/trace/events/preemptirq.h Cc: Steven Rostedt <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: [email protected] -- 2.14.1.581.gf28d330327-goog
