[LU-8738] sanity test_255b: FAIL: Ladvise willread should use more memory than 76800 KiB

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.9.0
• Affects Version/s: Lustre 2.9.0
• Severity: 3
• Assignee: James Nunez (Inactive)
• Reporter: Jian Yu

Description

sanity test 255b failed as follows:

== sanity test 255b: check 'lfs ladvise -a dontneed' ================================================= 17:21:04 (1476811264)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 0.778124 s, 135 MB/s
CMD: trevis-41vm4 cat /proc/meminfo | grep ^MemTotal:
Total memory: 1923480 KiB
CMD: trevis-41vm4 sync && echo 3 > /proc/sys/vm/drop_caches
CMD: trevis-41vm4 cat /proc/meminfo | grep ^Cached:
Cache used before read: 72592 KiB
CMD: trevis-41vm4 cat /proc/meminfo | grep ^Cached:
Cache used after read: 120972 KiB
CMD: trevis-41vm4 cat /proc/meminfo | grep ^Cached:
Cache used after dontneed ladvise: 18572 KiB
 sanity test_255b: @@@@@@ FAIL: Ladvise willread should use more memory than 76800 KiB

Maloo reports:
https://testing.hpdd.intel.com/test_sets/c98e8654-9d15-11e6-9f24-5254006e85c2
https://testing.hpdd.intel.com/test_sets/f1a59ea0-9605-11e6-a96f-5254006e85c2
https://testing.hpdd.intel.com/test_sets/ba662914-9588-11e6-9722-5254006e85c2
https://testing.hpdd.intel.com/test_sets/793fd440-95af-11e6-a96f-5254006e85c2
https://testing.hpdd.intel.com/test_sets/14b006f8-956e-11e6-9fed-5254006e85c2
https://testing.hpdd.intel.com/test_sets/7d75d880-8b9a-11e6-a8b7-5254006e85c2
https://testing.hpdd.intel.com/test_sets/abe41d90-895f-11e6-a8b7-5254006e85c2