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Subject[PATCH v4 0/5] Some improvements of resctrl selftest

The aim of this patch series is to improve the resctrl selftest.
Without these fixes, some unnecessary processing will be executed
and test results will be confusing.
There is no behavior change in test themselves.

[patch 1] Make write_schemata() run to set up shemata with 100% allocation
on first run in MBM test.
[patch 2] The MBA test result message is always output as "ok",
make output message to be "not ok" if MBA check result is failed.
[patch 3] When a child process is created by fork(), the buffer of the
parent process is also copied. Flush the buffer before
executing fork().
[patch 4] Add a signal handler to cleanup properly before exiting the
parent process if there is an error occurs after creating
a child process with fork() in the CAT test.
[patch 5] Before exiting each test CMT/CAT/MBM/MBA, clear test result
files function cat/cmt/mbm/mba_test_cleanup() are called
twice. Delete once.

This patch series is based on Linux v6.1-rc5

Difference from v3:
[patch 2]
Rename "failed" to "ret" to avoid confusion.
[patch 4]
- Use sigaction(2) instead of signal().
- Add a description of using global bm_pid in commit message.
- Add comments to clarify why let the child continue to its
infinite loop after the write() failed.
[patch 5]
Ensure to run cat/cmt/mbm/mba_test_cleanup() to clear test result
file before return if an error occurs.

Pervious versions of this series:

Shaopeng Tan (5):
selftests/resctrl: Fix set up schemata with 100% allocation on first
run in MBM test
selftests/resctrl: Return MBA check result and make it to output
selftests/resctrl: Flush stdout file buffer before executing fork()
selftests/resctrl: Cleanup properly when an error occurs in CAT test
selftests/resctrl: Remove duplicate codes that clear each test result

tools/testing/selftests/resctrl/cat_test.c | 31 +++++++++++++------
tools/testing/selftests/resctrl/cmt_test.c | 7 ++---
tools/testing/selftests/resctrl/mba_test.c | 23 +++++++-------
tools/testing/selftests/resctrl/mbm_test.c | 20 ++++++------
.../testing/selftests/resctrl/resctrl_tests.c | 4 ---
tools/testing/selftests/resctrl/resctrl_val.c | 1 +
tools/testing/selftests/resctrl/resctrlfs.c | 5 ++-
7 files changed, 50 insertions(+), 41 deletions(-)


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