Hi Dmitry, I was investigating why ext4/304 is failing, and it's due to defrag-fuzzer returning an error: defrag-fuzzer: (groupid=0, jobs=1): err=22 (file:ioengines.c:309, func=td_io_que ue, error=Invalid argument): pid=3207: Sun Oct 18 19:43:57 2015 After instrumenting the kernel, it appears that this is due to donor inode's i_size being set to 0. Can you reproduce this faiure? And if it's working for you, what version of fio are you using? I normally use fio 2.1.3, since newer versions of fio have caused test regressions that appear to be caused by fio bugs. I tried fio 2.1.14, it was also failing. I could try using 2.2.x versions of fio, but as I recall, that set of versions was were I started running into other test failures caused by fio bugs. (When I asked Dave Chinner about this a while back, he tod me he was using 2.1.3 because he had run into regressions caused by vio, and I've been sticking with fio 2.1.3 for quite a while now.) Thanks, - Ted -- 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