cpuset_memory_spread in ubuntu_ltp_controllers failed with "TFAIL: failed to mkfifo ./myfifo"

[Po-Hsu Lin]

Issue found on Impish oracle 5.13.0-1023.28, with instance BM.Standard2.52 only.

Test failed with:
mkfifo: cannot create fifo './myfifo': File exists
cpuset_memory_spread 1 TFAIL: failed to mkfifo ./myfifo

Test log:
INFO: Test start time: Wed Mar 16 19:39:26 UTC 2022
COMMAND: /opt/ltp/bin/ltp-pan -q -e -S -a 502157 -n 502157 -f /tmp/ltp-RO29JzORIM/alltests -l /dev/null -C /dev/null -T /dev/null
LOG File: /dev/null
FAILED COMMAND File: /dev/null
TCONF COMMAND File: /dev/null
Running tests.......
cpuset_memory_spread 1 TINFO: CPUs are numbered continuously starting at 0 (0-103)
cpuset_memory_spread 1 TINFO: Nodes are numbered continuously starting at 0 (0-1)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 0.0867227 s, 1.2 GB/s
mkfifo: cannot create fifo './myfifo': File exists
cpuset_memory_spread 1 TFAIL: failed to mkfifo ./myfifo
INFO: ltp-pan reported some tests FAIL
LTP Version: 20210927
INFO: Test end time: Wed Mar 16 19:39:26 UTC 2022

This is not a regression, this failure can be found in older kernels.

[Po-Hsu Lin (cypressyew)]

Can be found on J 5.15.0-47.51 as well.