On Thu, Nov 29, 2018 at 10:04 AM John Nielsen <li...@jnielsen.net> wrote:
> > On Nov 29, 2018, at 7:21 AM, Eugene Grosbein <eu...@freebsd.org> wrote: > > > > Author: eugen > > Date: Thu Nov 29 14:21:26 2018 > > New Revision: 341232 > > URL: https://svnweb.freebsd.org/changeset/base/341232 > > > > Log: > > Add new small tool trim(1) to delete contents for blocks on flash > > based storage devices that use wear-leveling algorithms. > > > > [snip] > > > +.Sh DESCRIPTION > > +The > > +.Nm > > +utility erases specified region of the device. > > +It is only relevant for flash based storage devices that use > wear-leveling > > +algorithms. > > I’m curious, would this also be useful for virtual disks or SAN/NAS > devices backed by thinly-provisioned storage? > Yes. It is. Any device that supports BIO_DELETE the trim will work on. It could work on files within a filesystem, but not in its current state. ftruncate, however, is a better match there. None of the filesystems support the DIOCDELETE ioctl. Warner _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
