Hi All, I run the xfstest on nfsv2, the case generic/089 will failed with timeout sometimes. The top of the stack always on 'nlmclnt_block' function. And the 'nlmclnt_lock' function will retry every 30s. So, the test case is killed by the timer and failed. We open the nlm_debug, found that: The client send unlock message to server, and the server handle it correct. But no 'NLM_LCK_GRANTED' message send to the client. The configuration about the xfstest and nfs server: The local.config of the xfstest is: export FSTYP=nfs export TEST_DEV=192.168.240.61:/export/ext4/test export TEST_DIR=/nfs/test export SCRATCH_DEV=192.168.240.61:/export/ext4/scratch export SCRATCH_MNT=/nfs/scratch export NFS_MOUNT_OPTIONS="-o acl,rw,relatime,vers=2,lock" The nfs server just export the share directory. I don't know why this case is skip from https://wiki.linux-nfs.org/wiki/index.php/Xfstests If any problem about the fcntl(F_SETLKW) wait so long time?