dmsquash: Add rd.live.overlay.thin
This option changes the underlying mechanism for the overlay in the
dmsquash module.
Instead of a plain dm snapshot a dm thin snapshot is used. The advantage
of the thin snapshot is, that the TRIM command is recognized, which
means that at runtime, only the occupied blocks will be claimed from
memory, and freed blocks will really be freed in ram.
Signed-off-by: Fabian Deutsch <fabiand@fedoraproject.org>
(cherry picked from commit
d6e34d362a05cda61baaf8e231ad3f0e8665a9cc)
projects / thirdparty / dracut.git / commit
