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Message-Id: <20180507204143.13061-1-joelaf@google.com>
Date: Mon, 7 May 2018 13:41:38 -0700
From: Joel Fernandes <joelaf@...gle.com>
To: linux-kernel@...r.kernel.org
Cc: "Joel Fernandes (Google)" <joel@...lfernandes.org>,
Steven Rostedt <rostedt@...dmis.org>,
Peter Zilstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
Tom Zanussi <tom.zanussi@...ux.intel.com>,
Namhyung Kim <namhyung@...nel.org>,
Thomas Glexiner <tglx@...utronix.de>,
Boqun Feng <boqun.feng@...il.com>,
Paul McKenney <paulmck@...ux.vnet.ibm.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Randy Dunlap <rdunlap@...radead.org>,
Masami Hiramatsu <mhiramat@...nel.org>,
Fenguang Wu <fengguang.wu@...el.com>,
Baohong Liu <baohong.liu@...el.com>,
Vedang Patel <vedang.patel@...el.com>, kernel-team@...roid.com
Subject: [PATCH RFC v6 0/5] Centralize and unify usage of preempt/irq tracepoints
From: "Joel Fernandes (Google)" <joel@...lfernandes.org>
This is the next revision of preempt/irq tracepoint centralization and
unified usage across the kernel.
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.
No major changes since v5. Just some spelling errors, small refactoring
etc. Also I removed the softirq bug fix from this series and submitted it
separately.
I am also writing a tracepoint self-test that runs various tests, along
with some documentation. I am planning to submit that separately since
it'll take some time to complete them and so that these can go in first.
See [1] for a preview of the tests I have so far (its early stage).
v6:
- fixed lockdep_recursion undefined issue, now using
lockdep_recursing().
- minor patch clean up
v5:
- Fixed performance issues due to rcu-idle handling
Joel Fernandes (Google) (4):
srcu: Add notrace variant of srcu_dereference
trace/irqsoff: Split reset into separate functions
tracepoint: Make rcuidle tracepoint callers use SRCU
tracing: Centralize preemptirq tracepoints and unify their usage
Paul 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 | 46 +++++-
include/trace/events/preemptirq.h | 23 +--
init/main.c | 5 +-
kernel/locking/lockdep.c | 35 ++---
kernel/sched/core.c | 2 +-
kernel/trace/Kconfig | 22 ++-
kernel/trace/Makefile | 2 +-
kernel/trace/trace_irqsoff.c | 235 +++++++++---------------------
kernel/trace/trace_preemptirq.c | 71 +++++++++
kernel/tracepoint.c | 15 +-
15 files changed, 282 insertions(+), 228 deletions(-)
create mode 100644 kernel/trace/trace_preemptirq.c
[1] tracepoint-selftests: https://tinyurl.com/tptests-1
Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Peter Zilstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc: Tom Zanussi <tom.zanussi@...ux.intel.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Thomas Glexiner <tglx@...utronix.de>
Cc: Boqun Feng <boqun.feng@...il.com>
Cc: Paul McKenney <paulmck@...ux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Randy Dunlap <rdunlap@...radead.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Fenguang Wu <fengguang.wu@...el.com>
Cc: Baohong Liu <baohong.liu@...el.com>
Cc: Vedang Patel <vedang.patel@...el.com>
Cc: kernel-team@...roid.com
Signed-off-by: Joel Fernandes (Google) <joel@...lfernandes.org>
--
2.17.0.441.gb46fe60e1d-goog
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