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 <[email protected]>
Cc: Peter Zilstra <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Cc: Tom Zanussi <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Thomas Glexiner <[email protected]>
Cc: Boqun Feng <[email protected]>
Cc: Paul McKenney <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Randy Dunlap <[email protected]>
Cc: Masami Hiramatsu <[email protected]>
Cc: Fenguang Wu <[email protected]>
Cc: Baohong Liu <[email protected]>
Cc: Vedang Patel <[email protected]>
Cc: [email protected]
Signed-off-by: Joel Fernandes <[email protected]>
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2.17.0.441.gb46fe60e1d-goog
