[LU-7786] improve racer cleanup , racer timeout, /mnt/lustre2 is still busy ...

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.9.0
• Affects Version/s: Lustre 2.8.0
• Labels: patch
• Severity: 3
• Assignee: WC Triage
• Reporter: Lokesh Nagappa Jaliminche (Inactive)

Description

racer timeout, t-f stucks on umount /mnt/lustre2 :

== racer test complete, duration 920 sec == 22:14:53 (1382220893)
Stopping clients: mft77,mft78 /mnt/lustre2 (opts:)
Stopping client mft78 /mnt/lustre2 opts:
COMMAND  PID USER   FD   TYPE      DEVICE SIZE/OFF               NODE NAME
dd      3567 root    1w   REG 1273,181606 80902144 144115205255725062 /mnt/lustre/racer/4
Stopping client mft77 /mnt/lustre2 opts:
COMMAND   PID USER   FD   TYPE      DEVICE  SIZE/OFF               NODE NAME
dd       7390 root    1w   REG 1273,181606  81574912 144115205255725062 /mnt/lustre/racer/8
dd       7395 root    1w   REG 1273,181606  81574912 144115205255725062 /mnt/lustre/racer/8
dd       7433 root    1w   REG 1273,181606  81592320 144115205255725062 /mnt/lustre2/racer/9
dd      31735 root    1w   REG 1273,181606 153261056 144115205255780734 /mnt/lustre/racer/2
/mnt/lustre2 is still busy, wait one second
/mnt/lustre2 is still busy, wait one second
/mnt/lustre2 is still busy, wait one second