[LU-11787] sanityn test 71a fails with ‘data is not flushed from client’

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.4
• Affects Version/s: Lustre 2.12.0, Lustre 2.13.0, Lustre 2.12.1, Lustre 2.12.2, Lustre 2.12.3, Lustre 2.14.0, Lustre 2.12.4, Lustre 2.12.5, Lustre 2.12.6, Lustre 2.15.0, Lustre 2.15.3
• Labels: arm ppc64 ppc64le
• Severity: 3
• Assignee: Xinliang Liu
• Reporter: James Nunez (Inactive)

Description

sanityn test_71a fails with ‘data is not flushed from client’ for ARM clients. These failures started on October 26, 2018.

Looking at a recent failure, https://testing.whamcloud.com/test_sets/f1121dd4-fdef-11e8-b837-52540065bddc , we see the following in the client test_log

== sanityn test 71a: correct file map just after write operation is finished ========================= 00:36:26 (1544488586)
CMD: trevis-24vm4 /usr/sbin/lctl get_param -n version 2>/dev/null ||
				/usr/sbin/lctl lustre_build_version 2>/dev/null ||
				/usr/sbin/lctl --version 2>/dev/null | cut -d' ' -f2
1+0 records in
1+0 records out
40960 bytes (41 kB) copied, 0.00437335 s, 9.4 MB/s
1+0 records in
1+0 records out
40960 bytes (41 kB) copied, 0.00155542 s, 26.3 MB/s
  File: '/mnt/lustre2/f71a.sanityn'
  Size: 163840    	Blocks: 1          IO Block: 4194304 regular file
Device: 2c54f966h/743766374d	Inode: 144115205322894149  Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2018-12-11 00:36:27.000000000 +0000
Modify: 2018-12-11 00:36:27.000000000 +0000
Change: 2018-12-11 00:36:27.000000000 +0000
 Birth: -
209708
fd: 3
extent in offset 0, length 122880
flags: 80000000
extent in offset 122880, length 40960
flags: 80000001
No unwritten extents, extents number 2, file size 163840, original size 81920
 sanityn test_71a: @@@@@@ FAIL: data is not flushed from client 

There are no errors in any of the console logs.

Logs for more of these test failures are at
https://testing.whamcloud.com/test_sets/8b2f4282-d9d0-11e8-b46b-52540065bddc
https://testing.whamcloud.com/test_sets/83526f8c-df5f-11e8-a871-52540065bddc
https://testing.whamcloud.com/test_sets/1de368ba-fa38-11e8-bb6b-52540065bddc

Issue Links

• is related to: LU-15122 Lustre ASSERTION( iobuf->dr_rw == 0 ) crash on Arm server end
• is related to: LU-10300 Can the Lustre 2.10.x clients support 64K kernel page?