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Message-ID: <20200404200723.26662e07@oasis.local.home>
Date: Sat, 4 Apr 2020 20:07:23 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
Ingo Molnar <mingo@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] tracing: Updates for 5.7
Linus,
New tracing features:
- The ring buffer is no longer disabled when reading the trace file.
The trace_pipe file was made to be used for live tracing and reading
as it acted like the normal producer/consumer. As the trace file
would not consume the data, the easy way of handling it was to just
disable writes to the ring buffer. This came to a surprise to the
BPF folks who complained about lost events due to reading.
This is no longer an issue. If someone wants to keep the old disabling
there's a new option "pause-on-trace" that can be set.
- New set_ftrace_notrace_pid file. PIDs in this file will not be traced
by the function tracer. Similar to set_ftrace_pid, which makes the
function tracer only trace those tasks with PIDs in the file, the
set_ftrace_notrace_pid does the reverse.
- New set_event_notrace_pid file. PIDs in this file will cause events
not to be traced if triggered by a task with a matching PID.
Similar to the set_event_pid file but will not be traced.
Note, sched_waking and sched_switch events may still be trace if
one of the tasks referenced by those events contains a PID that
is allowed to be traced.
Tracing related features:
- New bootconfig option, that is attached to the initrd file.
If bootconfig is on the command line, then the initrd file
is searched looking for a bootconfig appended at the end.
- New GPU tracepoint infrastructure to help the gfx drivers to get
off debugfs (acked by Greg Kroah-Hartman)
Other minor updates and fixes.
Please pull the latest trace-v5.7 tree, which can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
trace-v5.7
Tag SHA1: 7c483089c1d670b55a9b2d574a74b6c0f6481544
Head SHA1: 8e99cf91b99bb30e16727f10ad6828741c0e992f
Masami Hiramatsu (3):
bootconfig: Support O=<builddir> option
tools/bootconfig: Show line and column in parse error
ftrace/kprobe: Show the maxactive number on kprobe_events
Nathan Chancellor (1):
tracing: Use address-of operator on section symbols
Steven Rostedt (VMware) (22):
tracing: Have hwlat ts be first instance and record count of instances
tracing: Remove unused TRACE_BUFFER bits
selftest/ftrace: Fix function trigger test to handle trace not disabling the tracer
tracing: Save off entry when peeking at next entry
ring-buffer: Have ring_buffer_empty() not depend on tracing stopped
ring-buffer: Rename ring_buffer_read() to read_buffer_iter_advance()
ring-buffer: Add page_stamp to iterator for synchronization
ring-buffer: Have rb_iter_head_event() handle concurrent writer
ring-buffer: Do not die if rb_iter_peek() fails more than thrice
ring-buffer: Optimize rb_iter_head_event()
ring-buffer: Make resize disable per cpu buffer instead of total buffer
ring-buffer: Do not disable recording when there is an iterator
tracing: Do not disable tracing when reading the trace file
ring-buffer/tracing: Have iterator acknowledge dropped events
tracing: Have the document reflect that the trace file keeps tracing enabled
ftrace: Make function trace pid filtering a bit more exact
ftrace: Create set_ftrace_notrace_pid to not trace tasks
tracing: Create set_event_notrace_pid to not trace tasks
selftests/ftrace: Add test to test new set_ftrace_notrace_pid file
selftests/ftrace: Add test to test new set_event_notrace_pid file
tracing: Add documentation on set_ftrace_notrace_pid and set_event_notrace_pid
tracing: Do not allocate buffer in trace_find_next_entry() in atomic
Yiwei Zhang (1):
gpu/trace: add a gpu total memory usage tracepoint
----
Documentation/trace/ftrace.rst | 82 ++++--
drivers/Kconfig | 2 +
drivers/gpu/Makefile | 1 +
drivers/gpu/trace/Kconfig | 4 +
drivers/gpu/trace/Makefile | 3 +
drivers/gpu/trace/trace_gpu_mem.c | 13 +
include/linux/bootconfig.h | 3 +-
include/linux/ring_buffer.h | 4 +-
include/linux/trace_events.h | 2 +
include/trace/events/gpu_mem.h | 57 +++++
init/main.c | 14 +-
kernel/trace/ftrace.c | 200 +++++++++++++--
kernel/trace/ring_buffer.c | 239 ++++++++++++------
kernel/trace/trace.c | 110 ++++++--
kernel/trace/trace.h | 39 ++-
kernel/trace/trace_entries.h | 4 +-
kernel/trace/trace_events.c | 280 ++++++++++++++++-----
kernel/trace/trace_functions_graph.c | 2 +-
kernel/trace/trace_hwlat.c | 24 +-
kernel/trace/trace_kprobe.c | 2 +
kernel/trace/trace_output.c | 19 +-
lib/bootconfig.c | 35 ++-
tools/bootconfig/Makefile | 27 +-
tools/bootconfig/main.c | 35 ++-
tools/bootconfig/test-bootconfig.sh | 14 +-
.../selftests/ftrace/test.d/event/event-no-pid.tc | 125 +++++++++
.../test.d/ftrace/func-filter-notrace-pid.tc | 108 ++++++++
.../test.d/ftrace/func_traceonoff_triggers.tc | 2 +-
28 files changed, 1194 insertions(+), 256 deletions(-)
create mode 100644 drivers/gpu/trace/Kconfig
create mode 100644 drivers/gpu/trace/Makefile
create mode 100644 drivers/gpu/trace/trace_gpu_mem.c
create mode 100644 include/trace/events/gpu_mem.h
create mode 100644 tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc
create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/func-filter-notrace-pid.tc
---------------------------
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