[LU-12398] sanity test_255b: FAIL: Ladvise willread should use more memory than 76800 KiB

• Type: Bug
• Resolution: Cannot Reproduce
• Priority: Minor
• Environment: Lustre build: https://build.whamcloud.com/job/lustre-master/3904/ (tag 2.12.54) ; Lustre client distro: RHEL 8.0 ; Lustre server distro: RHEL 7.6
• Severity: 3
• Assignee: Dongyang Li
• Reporter: Jian Yu

Description

sanity test 255b failed as follows:

== sanity test 255b: check 'lfs ladvise -a dontneed' ================================================= 11:19:01 (1559845141)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 0.586058 s, 179 MB/s
CMD: vm7 cat /proc/meminfo | grep ^MemTotal:
Total memory: 1877564 KiB
CMD: vm7 sync && echo 3 > /proc/sys/vm/drop_caches
CMD: vm7 cat /proc/meminfo | grep ^Cached:
Cache used before read: 145664 KiB
CMD: vm7 cat /proc/meminfo | grep ^Cached:
Cache used after read: 145880 KiB
CMD: vm7 cat /proc/meminfo | grep ^Cached:
Cache used after dontneed ladvise: 145880 KiB
 sanity test_255b: @@@@@@ FAIL: Ladvise willread should use more memory than 76800 KiB

Maloo report: https://testing.whamcloud.com/test_sets/f180e12c-8889-11e9-be83-52540065bddc

Issue Links

• is related to: LU-16127 sanity test_255b: Ladvise dontneed should release more memory than 76800 KiB
• is related to: LU-12269 Support RHEL 8.0