[LU-15907] sanityn test_41i: fix the OBD_FAIL_MDS_REINT_OPEN2 race

• Status: Open
• Project: Lustre
• Type: Bug
• Priority: Minor
• Reporter: Etienne Aujames
• Assignee: Etienne Aujames
• Resolution: Unresolved
• Severity: 3

Description

With the https://review.whamcloud.com/47487 ("LU-15546 mdt: mdt_reint_open lookup before locking") , the OBD_FAIL_MDS_REINT_OPEN2 race timeouts in sanityn test_41i:

LustreError: 3945:0:(libcfs_fail.h:178:cfs_race()) cfs_fail_race id 16a awake: rc=0

Now, the first thread take a PW parent lock (by checking the child existence before locking) . So the second thread is waiting for lock (PR locks are compatible but not the PW locks) .

We have to force the first thread to take a PR parent lock to keep testing the full lock cycle:

• take PR parent lock
• lockup child (do not exist)
• take PW parent lock
• re-lookup
• create child

Comments

[Gerrit Updater]

"Etienne AUJAMES <[e-mail]>" uploaded a new patch: https://review.whamcloud.com/47506
Subject: LU-15907 mdt: fix the OBD_FAIL_MDS_REINT_OPEN2 race
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: d514137a5bf5bc53c2c35fb2c81f840813c45212