This fails with kernels as old as 4.4.0-101-generic and earlier too, so I don't think this is a kernel regression. I believe it's an issue with xfsprogs. For example, xfsprogs-4.14.0 can create an xfs file system on a file based system where as 4.3.0+nmu1ubuntu1.1 cannot:
buntu@s2lp3:~/xfsprogs-4.14.0$ ./mkfs/mkfs.xfs ~/foo meta-data=/home/ubuntu/foo isize=512 agcount=2, agsize=4096 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=1, sparse=0, rmapbt=0, reflink=0 data = bsize=4096 blocks=8192, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal log bsize=4096 blocks=855, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1738178 Title: ubuntu_ecryptfs tests failed on Xenial s390x instances To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ecryptfs-utils/+bug/1738178/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs