Use case is a user who doesn't know that today xattr +C ought to be set on vm images when on Btrfs. They use e.g. Gnome Boxes, or Virtual Machine Manager (virt-manager) to configure pools, images, and VMs. If libvirt were to set +C on any containing directory configured as a pool, then any copied as well as newly created images would inherit +C. So is this the long term recommended practice, and should various VM projects be asked to build this functionality? Or will there be optimizations, such as autodefrag, that will obviate the need for +C on such VM images in the somewhat near future? Chris Murphy-- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html