Re: What is needed for ZFS block cloning to work?

On Jul 11, 2026, at 2:34=E2=80=AFPM, John F Carr <[email protected]> wrote:
>=20
> I enabled block cloning on 15.1-STABLE but copy_file_range
> between two files in the same directory does not cause
> bcloneused to change.  I have vfs.zfs.bclone_enabled=3D1
> and feature@block_cloning=3Denabled.  Is anything more
> needed?

FWIW on my 15.1-STABLE (as of yesterday) machine I didn't
do anything special but it seems to work....

$ ls -lh
total 22 GB
-rw-r--r--  2 bakul staff   36G Jan 31  2017 img

$ time cp img img1
cp img img1  0.00s user 0.76s system 20% cpu 3.621 total

$ ls -lh
total 45 GB
-rw-r--r--  2 bakul staff   36G Jan 31  2017 img
-rw-r--r--  1 bakul wheel   36G Jul 11 15:30 img1

[on a SATA HD, during make buildworld]=