On Fri, Feb 3, 2017 at 10:18 AM, Chris Adams <linux@xxxxxxxxxxx> wrote: > Once upon a time, Chris Murphy <lists@xxxxxxxxxxxxxxxxx> said: >> Further I wonder if /etc/lvm/lvm.conf needs >> issue_discards = 1 >> >> Both / and /home are actually LV's which are made from the LUKS PV. So >> trim pass down from dmcrypt to block device isn't enough to do >> anything. > > LVM passes discards through automatically, assuming the block device > under the PV supports them. The issue_discards option tells LVM to > issue discards itself when PV space is released (e.g. an LV is > removed/reduced). Yep. I just tested it with the default issue_discards=0 and fstrim -v does work on an LV. Nevertheless I don't understand the benefit of this feature if fstrim.service is not enabled by default; nor is a discard mount option set for the file system in fstab. -- Chris Murphy _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
