linux-kernel - [PATCH v2 0/2] ftrace/selftest: clean up failure cases

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Date:   Wed, 19 Feb 2020 09:33:28 +0000
From:   Alan Maguire <alan.maguire@...cle.com>
To:     rostedt@...dmis.org, mhiramat@...nel.org
Cc:     mingo@...hat.com, shuah@...nel.org,
        linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org,
        Alan Maguire <alan.maguire@...cle.com>
Subject: [PATCH v2 0/2] ftrace/selftest: clean up failure cases

When running the ftrace selftests, 2 failures and 6 unresolved
cases were observed.  The failures can be avoided by setting
a sysctl prior to test execution (fixed in patch 1) and by
having unresolved cases not return 0 from ftracetest by default
since they indicate an absence of testing modules/programs
rather than ftrace issues (patch 2).

The latter are classified as "unresolved" tests, which operate
differently from "unsupported" tests.  For unsupported tests,
we note the unsupported count but do not consider the tests
as having failed, whereas with unresolved the test run is
considered to have failed so returns "not ok" when run via
kselftest ("make -C tools/testing/selftest/ftrace run_tests").

Patch 2 aligns the unresolved behaviour with the unsupported;
by default, unresolved outcomes do not trigger overall failure,
but they can if --fail-unresolved is specified.

Changes since v1:

- updated patch 1 to use /proc path instead of sysctl (Masami)
- updated patch 2 to modify unresolved handling in ftracetest
  rather than change individual unresolved -> unsupported (Masami)

Alan Maguire (2):
  ftrace/selftests: workaround cgroup RT scheduling issues
  ftrace/selftest: make unresolved cases cause failure if
    --fail-unresolved set

 tools/testing/selftests/ftrace/ftracetest | 30 +++++++++++++++++++++++++++++-
 1 file changed, 29 insertions(+), 1 deletion(-)

-- 
1.8.3.1