cpuset_memory_pressure in ubuntu_ltp_controllers failed on B-oracle BM.Standard2.52 (root group's memory_pressure didn't have memory pressure rate.)

[Po-Hsu Lin]

Issue found on Oracle instance BM.Standard2.52 only with kernel 4.15.0-1085.93

This failure can be found in 4.15.0-1084.92 / 4.15.0-1083.91 as well, thus it's not a regression.

Test failed with:
cpuset_memory_pressure 11 TFAIL: root group's memory_pressure didn't have memory pressure rate.

Test log:
Checking for required user/group ids

'nobody' user id and group found.
'bin' user id and group found.
'daemon' user id and group found.
Users group found.
Sys group found.
Required users/groups exist.
no big block device was specified on commandline.
Tests which require a big block device are disabled.
You can specify it with option -z
INFO: Test start time: Tue Dec 21 15:07:18 UTC 2021
COMMAND: /opt/ltp/bin/ltp-pan -q -e -S -a 57071 -n 57071 -f /tmp/ltp-9znr7PBmp3/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_pressure 1 TINFO: CPUs are numbered continuously starting at 0 (0-103)
cpuset_memory_pressure 1 TINFO: Nodes are numbered continuously starting at 0 (0-1)
cpuset_memory_pressure 1 TPASS: Cpuset memory pressure test succeeded.
cpuset_memory_pressure 3 TPASS: Cpuset memory pressure test succeeded.
cpuset_memory_pressure 5 TPASS: Cpuset memory pressure test succeeded.
Killed
cpuset_memory_pressure 7 TPASS: Cpuset memory pressure test succeeded.
cpuset_memory_pressure 9 TFAIL: root group's memory_pressure didn't have memory pressure rate.
Killed
cpuset_memory_pressure 11 TFAIL: root group's memory_pressure didn't have memory pressure rate.
INFO: ltp-pan reported some tests FAIL
LTP Version: 20210927
INFO: Test end time: Tue Dec 21 15:48:45 UTC 2021

[Joseph Salisbury (jsalisbury)]

Seen on b/aws-5.4 for 5.4.0-1109