Hi, running latest xfstest-bld with latest ext4 kernel "dev" branch(ad6599ab3a).I always get generic/018 failed. Then I took closer look and found out this issue. After run this: fragfile="/vdf/testfile" for I in `seq 9 -1 0`; do dd if=/dev/zero of=$fragfile bs=4k count=1 conv=notrunc seek=$I oflag=sync done Even though the file does exist. e4defrag complains about: (this output comes from kvm guest machine) > e4defrag -v /vdf/testfile Can't get super block info: Success "/vdf/testfile" Is this a known issue or something I did wrong. Thank you! Jon -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html