Hole-punching, TRIM, etc

[Warner Losh]

On Tue, Nov 13, 2018 at 3:52 PM Conrad Meyer <cem at freebsd.org> wrote:

> Geom devices have the DIOCGDELETE ioctl, which translates into
> BIO_DELETE (which is TRIM, as I understand it).
>

Correct. TRIM is both the catch-all term people use, as well as the name of
a specific DSM (data set management) command in the ATA command set. All
FLASH technologies have it (thought what it means under the covers varies a
bit). Thin provisioned resources like in VMs also have it.

Warner