Discard (TRIM) with KVM Virtual Machines

Update - March 09 2020 Since writing this article, I’ve made a few observations: More people read this than expected QEMU has since added discard support to the standard virtio disk, avoiding the need to use virtio-scsi It kinda sorta works out of the box. I’ve written a brief followup: Discard (TRIM) with KVM Virtual Machines… in 2020! Original Article I’ve got a bunch of KVM virtual machines running at home.