On Fri, Feb 3, 2017 at 9:32 AM, Tomasz Torcz <tomek@xxxxxxxxxxxxxx> wrote: > On Fri, Feb 03, 2017 at 09:25:07AM -0700, Nathanael D. Noblet wrote: >> On Fri, 2017-02-03 at 09:40 -0500, Josh Boyer wrote: >> > On Mon, Jan 16, 2017 at 10:32 AM, Jan Kurik <jkurik@xxxxxxxxxx> >> > wrote: >> > > = System Wide Change: Enable TRIM pass down to encrypted disks = >> > > https://fedoraproject.org/wiki/Changes/EnableTrimOnDmCrypt >> > > >> > > Change owner(s): >> > > * Vratislav Podzimek <vpodzime AT redhat DOT com> >> > > * Ondrej Kozina <okozina AT redhat DOT com> >> > > >> > > >> > > Override kernel default for dm-crypt mappings of LUKS1 encrypted >> > > volumes via flag put in /etc/crypttab file. This change should >> > > affect >> > > only newly created encrypted storage based on LUKS1 format during >> > > installation. >> >> So I've got multiple systems with encrypted partitions on SSD disks. >> Are there ways of enabling this for pre-existing partitions? > > I believe putting “discard” at the the of each line in /etc/crypttab > will do the trick. That just causes device mapper to pass trim issued to the dmcrypt device to the underlying block device; it doesn't actually issue trim. Something else has to do that, like fstrim.service or discard mount option for the file system; neither of which I'd recommend by default. I'm not really sure what this feature is going to do on its own. -- Chris Murphy _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
