On Friday, 12 August 2016 10:37:30 CEST Richard W.M. Jones wrote:
 This *may* be required by some filesystems in order for fstrim to
 work.  I'm not actually sure if this is true, but it's what
 virt-sparsify --in-place does, and that utility has been tested a lot
 more in regards to trimming.
 --- 
LGTM
Thanks,
-- 
Pino Toscano