With btrfs-prog 4.17 as shipped with Alpine 3.8 the btrfs tests
fail with:
ERROR: '/dev/loop1' is too small to make a usable filesystem
ERROR: minimum size for each btrfs device is 114294784
btrfs-prog commit 997f9977c243 ("btrfs-progs: mkfs: Prevent
temporary system chunk to use space in reserved 1M range")
changed the code to compute the minimum size for a btrfs size
and is the likely reason for this error.
Increase the size of the loop back device to 128MB for
the btrfs test.
With this fix, the containerd tests pass on Alpine 3.8,
tested in LinuxKit with kernel 4.14.53.
fixes#2447
Signed-off-by: Rolf Neugebauer <rolf.neugebauer@gmail.com>
651920405e