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Date: Wed, 6 Sep 2017 17:17:49 -0700 From: Joel Fernandes <joelaf@...gle.com> To: linux-kernel@...r.kernel.org Cc: Joel Fernandes <joelaf@...gle.com>, Steven Rostedt <rostedt@...dmis.org>, Peter Zijlstra <peterz@...radead.org>, kernel-team@...roid.com Subject: [PATCH RFC v4 0/3] tracing: Add trace events for preemption and irq disable/enable. These patches add trace events support for preempt and irq disable/enable events. Changes since v3 (link [1]): Previously the patch series used the terms "critical section" but Peter suggested that this name is confusing due to ambiguity, so I dropped calling it that in this series. See discussion in [1]. I also dropped the "preemptirq" combined event (which behaves similar to the preemptirqsoff tracer) for now and will keep that for a later patch once we can get this foundation series in. Here's an example of how Android's systrace will be using it to show atomic sections as a gantt chart: http://imgur.com/download/TZplEVp I also added a slightly unrelated fix for a config option (patch 3/3). [1] https://patchwork.kernel.org/patch/9936045/ Joel Fernandes (3): trace/irqsoff: Prepare to add preempt and irq trace events trace: Add support for preempt and irq enable/disable events ftrace: Use correct config option for preemption debug include/linux/ftrace.h | 7 +- include/linux/irqflags.h | 4 +- include/trace/events/preemptirq.h | 62 +++++++++++++ kernel/trace/Kconfig | 9 ++ kernel/trace/Makefile | 1 + kernel/trace/trace_irqsoff.c | 178 +++++++++++++++++++++++++++++++------- 6 files changed, 226 insertions(+), 35 deletions(-) create mode 100644 include/trace/events/preemptirq.h Cc: Steven Rostedt <rostedt@...dmis.org> Cc: Peter Zijlstra <peterz@...radead.org> Cc: kernel-team@...roid.com -- 2.14.1.581.gf28d330327-goog
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