linux-kernel - [PATCH v4 0/5] Faultable Tracepoints

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Message-Id: <20231120205418.334172-1-mathieu.desnoyers@efficios.com>
Date:   Mon, 20 Nov 2023 15:54:13 -0500
From:   Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Masami Hiramatsu <mhiramat@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Alexei Starovoitov <ast@...nel.org>,
        Yonghong Song <yhs@...com>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>, bpf@...r.kernel.org,
        Joel Fernandes <joel@...lfernandes.org>
Subject: [PATCH v4 0/5] Faultable Tracepoints

Wire up the system call tracepoints with Tasks Trace RCU to allow
the ftrace, perf, and eBPF tracers to handle page faults.

This series does the initial wire-up allowing tracers to handle page
faults, but leaves out the actual handling of said page faults as future
work.

I have tested this against a feature branch of lttng-modules which
implements handling of page faults for the filename argument of the
openat(2) system call.

This series is based on kernel v6.6.2.

Thanks,

Mathieu

Mathieu Desnoyers (5):
  tracing: Introduce faultable tracepoints (v4)
  tracing/ftrace: Add support for faultable tracepoints
  tracing/bpf-trace: add support for faultable tracepoints
  tracing/perf: add support for faultable tracepoints
  tracing: convert sys_enter/exit to faultable tracepoints

Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Alexei Starovoitov <ast@...nel.org>
Cc: Yonghong Song <yhs@...com>
Cc: Paul E. McKenney <paulmck@...nel.org>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: bpf@...r.kernel.org
Cc: Joel Fernandes <joel@...lfernandes.org>

 include/linux/tracepoint-defs.h | 14 +++++
 include/linux/tracepoint.h      | 88 ++++++++++++++++++++++---------
 include/trace/bpf_probe.h       | 21 ++++++--
 include/trace/define_trace.h    |  7 +++
 include/trace/events/syscalls.h |  4 +-
 include/trace/perf.h            | 27 ++++++++--
 include/trace/trace_events.h    | 73 ++++++++++++++++++++++++--
 init/Kconfig                    |  1 +
 kernel/trace/bpf_trace.c        | 10 +++-
 kernel/trace/trace_events.c     | 26 +++++++---
 kernel/trace/trace_fprobe.c     |  5 +-
 kernel/trace/trace_syscalls.c   | 92 +++++++++++++++++++++++----------
 kernel/tracepoint.c             | 58 +++++++++++----------
 13 files changed, 325 insertions(+), 101 deletions(-)

-- 
2.25.1