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 <rost...@goodmis.org>
Cc: Peter Zilstra <pet...@infradead.org>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Mathieu Desnoyers <mathieu.desnoy...@efficios.com>
Cc: Tom Zanussi <tom.zanu...@linux.intel.com>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Thomas Glexiner <t...@linutronix.de>
Cc: Boqun Feng <boqun.f...@gmail.com>
Cc: Paul McKenney <paul...@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Cc: Randy Dunlap <rdun...@infradead.org>
Cc: Masami Hiramatsu <mhira...@kernel.org>
Cc: Fenguang Wu <fengguang...@intel.com>
Cc: Baohong Liu <baohong....@intel.com>
Cc: Vedang Patel <vedang.pa...@intel.com>
Cc: kernel-t...@android.com
Signed-off-by: Joel Fernandes <joe...@google.com>
--
2.17.0.441.gb46fe60e1d-goog
