Jesse Pretorius 42189e272f MNAIO: Use discard option for all mount points
Using the discard option for all mount points ensures
that the deletes actually release the blocks on the disk.
This ensures that SSD performance is optimised and that
file-backed images are kept as small as possible.

Change-Id: I648cbaca56d75e355cf6c8af01e2e3ad20dfc398
2018-08-23 18:57:02 +01:00
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