Vivek, You mentioned the need to run unionmount tests on custom layers (virtiofs in your case) and I provided you the /etc/fstab solution, which you said works for you. I now added a new way to run unionmount tests on custom layers, which I am going to use for xfstests integration [1]. I'd be interested to know if this method serves your use case as well. Note that I overloaded the meaning of configuring base/lower/upper path: 1. Use path different than the default 2. Do not mount tmpfs nor unmount this path I realize that it might have been better to split the two meanings into different config options. However, I am not fond of maintaining config permutations that nobody is using. So unless a user comes forward with a use case, that's the way I intend to leave it. Would love to get comments from anyone else of course. Would love to get testing feedback from people that use the --fuse option, because I am not testing it regularly. Thanks, Amir. [1] https://github.com/amir73il/xfstests/commits/unionmount Amir Goldstein (2): Stop using bind mounts for --samefs Configure custom layers via environment variables README | 11 +++++++ mount_union.py | 8 ++--- run | 3 +- set_up.py | 84 +++++++++++++++++++++++++++--------------------- settings.py | 61 +++++++++++++++++++++++++---------- unmount_union.py | 19 ++++++----- 6 files changed, 117 insertions(+), 69 deletions(-) -- 2.17.1