hugemmap05* / hugemmap06 from hugetlb in ubuntu_ltp failed on B-5.0 AWS

These hugemmap05* / hugemmap06 tests failed on ARM64 node "a1.medium" exclusively with B-AWS-5.0:
 tag=hugemmap05 stime=1573101926 dur=0 exit=exited stat=2 core=no cu=0 cs=0
 startup='Thu Nov 7 04:45:26 2019'
 tst_test.c:1217: INFO: Timeout per run is 0h 05m 00s
 hugemmap05.c:223: INFO: original nr_hugepages is 0
 hugemmap05.c:236: INFO: original nr_overcommit_hugepages is 0
 hugemmap05.c:89: BROK: mmap((nil),402653184,3,1,21,0) failed: ENOMEM (12)
 hugemmap05.c:180: INFO: restore nr_hugepages to 0.
 hugemmap05.c:189: INFO: restore nr_overcommit_hugepages to 0.

 Summary:
 passed 0
 failed 0
 skipped 0
 warnings 0

 tag=hugemmap06 stime=1573101928 dur=0 exit=exited stat=2 core=no cu=0 cs=8
 startup='Thu Nov 7 04:45:28 2019'
 tst_test.c:1217: INFO: Timeout per run is 0h 05m 00s
 mem.c:814: INFO: set nr_hugepages to 255
 mem.c:823: BROK: nr_hugepages = 187, but expect 255
 mem.c:814: INFO: set nr_hugepages to 0

 Summary:
 passed 0
 failed 0
 skipped 0
 warnings 0

 tag=hugemmap05_1 stime=1573101930 dur=0 exit=exited stat=2 core=no cu=0 cs=1
 startup='Thu Nov 7 04:45:30 2019'
 tst_test.c:1217: INFO: Timeout per run is 0h 05m 00s
 hugemmap05.c:223: INFO: original nr_hugepages is 0
 hugemmap05.c:236: INFO: original nr_overcommit_hugepages is 0
 tst_safe_sysv_ipc.c:99: BROK: hugemmap05.c:85: shmget(218366039, 402653184, b80) failed: ENOMEM (12)
 hugemmap05.c:180: INFO: restore nr_hugepages to 0.
 hugemmap05.c:189: INFO: restore nr_overcommit_hugepages to 0.

 Summary:
 passed 0
 failed 0
 skipped 0
 warnings 0

 tag=hugemmap05_2 stime=1573101932 dur=0 exit=exited stat=2 core=no cu=0 cs=0
 startup='Thu Nov 7 04:45:32 2019'
 tst_test.c:1217: INFO: Timeout per run is 0h 05m 00s
 hugemmap05.c:223: INFO: original nr_hugepages is 0
 hugemmap05.c:236: INFO: original nr_overcommit_hugepages is 0
 hugemmap05.c:89: BROK: mmap((nil),402653184,3,1,21,0) failed: ENOMEM (12)
 hugemmap05.c:180: INFO: restore nr_hugepages to 0.
 hugemmap05.c:189: INFO: restore nr_overcommit_hugepages to 0.

 Summary:
 passed 0
 failed 0
 skipped 0
 warnings 0

 tag=hugemmap05_3 stime=1573101934 dur=0 exit=exited stat=2 core=no cu=0 cs=1
 startup='Thu Nov 7 04:45:34 2019'
 tst_test.c:1217: INFO: Timeout per run is 0h 05m 00s
 hugemmap05.c:223: INFO: original nr_hugepages is 0
 hugemmap05.c:236: INFO: original nr_overcommit_hugepages is 0
 tst_safe_sysv_ipc.c:99: BROK: hugemmap05.c:85: shmget(218366039, 402653184, b80) failed: ENOMEM (12)
 hugemmap05.c:180: INFO: restore nr_hugepages to 0.
 hugemmap05.c:189: INFO: restore nr_overcommit_hugepages to 0.

 Summary:
 passed 0
 failed 0
 skipped 0
 warnings 0