linux-kernel - [PATCH 0/3] tracing: Add dynamic strings for synthetic events

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Date:   Tue, 29 Sep 2020 15:33:38 -0500
From:   Tom Zanussi <zanussi@...nel.org>
To:     rostedt@...dmis.org, axelrasmussen@...gle.com
Cc:     mhiramat@...nel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/3] tracing: Add dynamic strings for synthetic events

Hi,

This patchset adds support for dynamic strings for synthetic events,
as requested by Axel Rasmussen.

Actually, the first two patches should be applied in any case - the
first just changes the current max string length and the second fixes
a bug I found while testing.

It works fine for my simple test cases, but I still need to do a lot
more testing, especially of the in-kernel API parts, which don't
affect Axel's use case.

Anyway, Axel, please try it out and send me your Tested-by: if it
works for you, and your broken testcase(s) if it doesn't. ;-)

Thanks,

Tom

The following changes since commit 106c076d23cca67c959a6fd1ccadb5b3ef01ddc9:

  mmap_lock: add tracepoints around lock acquisition (2020-09-23 08:48:08 -0500)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/zanussi/linux-trace.git ftrace/synth-dynstring-v0

Tom Zanussi (3):
  tracing: Change STR_VAR_MAX_LEN
  tracing: Fix parse_synth_field() error handling
  tracing: Add support for dynamic strings to synthetic events

 Documentation/trace/events.rst    |  15 ++-
 Documentation/trace/histogram.rst |  18 ++++
 kernel/trace/trace_events_hist.c  |   9 ++
 kernel/trace/trace_events_synth.c | 163 ++++++++++++++++++++++++++----
 kernel/trace/trace_synth.h        |   6 +-
 5 files changed, 186 insertions(+), 25 deletions(-)

-- 
2.17.1