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

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. ;-)



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:// 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(-)


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