Hi, When I tested xfstests generic/465 with NFS, there was something unexpected. When memory of NFS server was 10G, test passed. But when memory of NFS server was 4G, test failed. Fail message was as below. non-aio dio test encounter an error: block 4 offset 0, content 62 aio-dio test encounter an error: block 1 offset 0, content 62 All of the NFS versions(v3 v4.0 v4.1 v4.2) have this problem. Maybe something is wrong about NFS's I/O operation. Thanks in advance.