[SRU][G][H][I][UNSTABLE][PATCH 0/1] selftests/ftrace: fix event-no-pid on 1-core machine
Krzysztof Kozlowski
krzysztof.kozlowski at canonical.com
Mon Jul 5 15:47:32 UTC 2021
BugLink: https://bugs.launchpad.net/bugs/1927749
SRU Justification:
[Impact]
* Kernel selftests ftrace test fails on small machines which makes it
difficult/impossible to spot real ftrace failure.
* Only 1-core CPUs are affected.
* When running event-no-pid test on small machines (e.g. cloud 1-core
instance), other events might not happen.
[Fix]
* Schedule a simple sleep task to be sure that some other process events
get recorded.
* Fix accepted in mainline (v5.14-rc1 merge window).
[Test Plan]
* Run ftrace test from kernel selftests.
[Where problems could occur]
* Only kernel selftests should be affected.
* ftrace test can have false positives or negatives.
Best regards,
Krzysztof
Krzysztof Kozlowski (1):
selftests/ftrace: fix event-no-pid on 1-core machine
.../testing/selftests/ftrace/test.d/event/event-no-pid.tc | 7 +++++++
1 file changed, 7 insertions(+)
--
2.27.0
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