On Mon, 2018-07-09 at 16:20 +0200, Michael Niewöhner wrote: > On Mon, 2018-07-09 at 16:10 +0200, Michael Niewöhner wrote: > > > But this requires all of the RAID to be mounted and trimmed as > > > the re-sync is happening, so all filesystems need to cooperate, > > > and storage layers like LVM need special treatment too to trim > > > free PV space. > > > > LVM passes trim to the lower layers so no problem here. > > Now I got what you meant. Deleting a vg/lv would not issue a TRIM command. > LVM would need to implement TRIM, too but IMHO md-raid should not care about > that for now. > Until LVM itself supports TRIM when deleting LVs / VGs there is a workaround: - remove LV that you want to delete as usual with lvremove - create an LV with size=100%FREE and discard enabled - run blkdiscard on LV - remove LV with lvremove -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
