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Subject[PATCH v2 0/4] tracing: Improve error messages for histogram sorting
This is v2 of the histogram sorting error message patchset.  The code
is the same as v1 - this version only adds new Fixes:, Reviewed-by:,
and Reported-by: tags.

Text from original post:


These patches add some improvements for histogram sorting, addressing
some shortcomings pointed out by Masami.

In order to address the specific problem pointed out by Masami, as
well as add additional related error messages, the first patch
does some simplification of assignment parsing.

The second patch actually adds the new error messages.

The fourth patch adds a new testcase for hist trigger parsing, similar
to the same kind of tests for kprobes and uprobes. Additional tests
covering all possible hist trigger errors should/will be added here in
the future.

The third patch just adds a missing hist: prefix to the error log so
that the testcases work properly, and which should have been there



The following changes since commit a124692b698b00026a58d89831ceda2331b2e1d0:

ftrace: Enable trampoline when rec count returns back to one (2019-05-25 23:04:43 -0400)

are available in the git repository at:

git:// ftrace-hist-sort-err-msgs-v2

Tom Zanussi (4):
tracing: Simplify assignment parsing for hist triggers
tracing: Add hist trigger error messages for sort specification
tracing: Add 'hist:' to hist trigger error log error string
tracing: Add new testcases for hist trigger parsing errors

kernel/trace/trace_events_hist.c | 94 +++++++++++-----------
.../test.d/trigger/ | 32 ++++++++
2 files changed, 78 insertions(+), 48 deletions(-)
create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/


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