Messages in this thread | | | From | Joel Fernandes <> | Subject | [PATCH RFC v5 0/6] Centralize and unify usage of preempt/irq tracepoints | Date | Mon, 30 Apr 2018 18:41:58 -0700 |
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This is the next revision of preempt/irq tracepoint centralization and unified usage across the kernel [1]. The preempt/irq tracepoints exist but not everything in the kernel is using it. This makes things not work simultaneously (for ex, only either lockdep or irqsoff events can be used at a time). This series is an attempt to solve that, and also results in a nice clean up of kernel in general. Several ifdefs are simpler, and the design is more unified and better. Also as a result of this, we also speeded performance all rcuidle tracepoints since their handling is simpler.
v5: - Fixed performance issues due to rcu-idle handling
Joel Fernandes (5): softirq: reorder trace_softirqs_on to prevent lockdep splat srcu: Add notrace variant of srcu_dereference trace/irqsoff: Split reset into seperate functions tracepoint: Make rcuidle tracepoint callers use SRCU tracing: Centralize preemptirq tracepoints and unify their usage
Paul E. McKenney (1): srcu: Add notrace variants of srcu_read_{lock,unlock}
include/linux/ftrace.h | 11 +- include/linux/irqflags.h | 11 +- include/linux/lockdep.h | 8 +- include/linux/preempt.h | 2 +- include/linux/srcu.h | 22 +++ include/linux/tracepoint.h | 47 +++++- include/trace/events/preemptirq.h | 23 +-- init/main.c | 5 +- kernel/locking/lockdep.c | 35 ++--- kernel/sched/core.c | 2 +- kernel/softirq.c | 6 +- kernel/trace/Kconfig | 22 ++- kernel/trace/Makefile | 2 +- kernel/trace/trace_irqsoff.c | 235 +++++++++--------------------- kernel/trace/trace_preemptirq.c | 71 +++++++++ kernel/tracepoint.c | 10 +- 16 files changed, 283 insertions(+), 229 deletions(-) create mode 100644 kernel/trace/trace_preemptirq.c
Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zilstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Tom Zanussi <tom.zanussi@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Thomas Glexiner <tglx@linutronix.de> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Fenguang Wu <fengguang.wu@intel.com> Cc: Baohong Liu <baohong.liu@intel.com> Cc: Vedang Patel <vedang.patel@intel.com> Cc: kernel-team@android.com Signed-off-by: Joel Fernandes <joelaf@google.com> -- 2.17.0.441.gb46fe60e1d-goog
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