[LU-18379] conf-sanity/127 fails with more than 1% space left

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0
• Affects Version/s: Lustre 2.16.0
• Labels: mtg
• Severity: 3
• Assignee: Alex Zhuravlev
• Reporter: Alex Zhuravlev

Description

Stopping clients: /mnt/lustre  (opts:)
cannot run remote command on /mnt/lustre with no_dsh
osc.lustre-OST0000-osc-MDT0000.active updated after 0 sec (got 1)
dd: error writing '/mnt/lustre/f127.conf-sanity': No space left on device
124+0 records in
123+0 records out
128974848 bytes (129 MB, 123 MiB) copied, 0.468713 s, 275 MB/s
UUID                   1K-blocks        Used   Available Use% Mounted on
lustre-MDT0000_UUID        95248        1616       84976   2% /mnt/lustre[MDT:0] 
lustre-OST0000_UUID       142216        1388      126828   2% /mnt/lustre[OST:0] 

filesystem_summary:       142216        1388      126828   2% /mnt/lustre

-rw-r--r-- 1 root root 128974848 Oct 17 18:11 /mnt/lustre/f127.conf-sanity
 conf-sanity test_127: @@@@@@ FAIL: more than 1% space left: before=126828 after=126828 

this checks in the test:

	if ((avail2 * 100 / avail1 > 1)); then

implies avail1 is greater than avail2 which is not always true