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

Wed, 1 Jun 2022 16:21:03 +0000

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

Whamcloud Community JIRA

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