[LU-8522] sanity 76 fails on clients with CONFIG_SLAB unset (inode slab grew from 400 to 525)

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0
• Affects Version/s: Lustre 2.9.0, Lustre 2.13.0
• Severity: 3
• Assignee: Neil Brown
• Reporter: John Hammond

Description

If CONFIG_SLAB is unset then /proc/slabinfo is not writable. So the tuning done in sanity test_76 is ineffective and the test fails. In fact it fails every time I run it locally:

== sanity test 76: confirm clients recycle inodes properly =========================================== 11:30:51 (1471883451)
lustre/tests/sanity.sh: line 5769: echo: write error: Input/output error
before inodes: 400
after inodes: 525
wait 2 seconds inodes: 525
wait 4 seconds inodes: 525
wait 6 seconds inodes: 525
wait 8 seconds inodes: 525
wait 10 seconds inodes: 525
wait 12 seconds inodes: 525
wait 14 seconds inodes: 525
wait 16 seconds inodes: 525
wait 18 seconds inodes: 525
wait 20 seconds inodes: 525
wait 22 seconds inodes: 525
wait 24 seconds inodes: 525
wait 26 seconds inodes: 525
wait 28 seconds inodes: 525
wait 30 seconds inodes: 525
wait 32 seconds inodes: 525
 sanity test_76: @@@@@@ FAIL: inode slab grew from 400 to 525 
  Trace dump:
  = /root/lustre-release-ee/lustre/tests/test-framework.sh:4779:error_noexit()
  = /root/lustre-release-ee/lustre/tests/test-framework.sh:4810:error()
  = lustre/tests/sanity.sh:5798:test_76()
  = /root/lustre-release-ee/lustre/tests/test-framework.sh:5057:run_one()
  = /root/lustre-release-ee/lustre/tests/test-framework.sh:5094:run_one_logged()
  = /root/lustre-release-ee/lustre/tests/test-framework.sh:4911:run_test()
  = lustre/tests/sanity.sh:5803:main()
Dumping lctl log to /tmp/test_logs/1471883448/sanity.test_76.*.1471883485.log
Dumping logs only on local client.
FAIL 76 (35s)

Issue Links

• is related to: LU-12207 sanity test_76: inode slab grew from 69804 to 69816