On 2/19/20 4:53 AM, Max Reitz wrote: Commit 0bc16997 has already landed, so no further review will show in git history. But you're always welcome to raise issues that might result in follow-up patches. Personally, I think that since nbdkit already provides a good partition filter [1], any other implementation of a partition filter is duplicated effort. The only reason to teach qemu how to access an arbitrary partition is if it makes serving that arbitrary partition to a guest more efficient than what is currently possible by pointing qemu at an NBD server run by nbdkit with its partition filter. But in general, you are more likely to want qemu to serve an entire disk image file to the guest (and let the guest interpret partitions embedded within that file) than to have qemu serve a single partition to a guest (and have the guest treat that partition as a bare disk), so I don't see it as something that would be frequently used or needed in qemu. [1] http://libguestfs.org/nbdkit-partition-filter.1.html -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3226 Virtualization: qemu.org | libvirt.org