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

[Tom Zanussi]

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