So given that information, I think this bug is triaged/wishlist against virt-manager. If virt-manager can detect that you've selected a LVM volume for the backing disk, then it could perhaps force cache=none.
I doubt, however, that we'll have time to work on this. Feel free to submit a patch, or propose this to the upstream virt-manager community.
@Jamin-
Okay, thanks for that last bit.
So given that information, I think this bug is triaged/wishlist against virt-manager. If virt-manager can detect that you've selected a LVM volume for the backing disk, then it could perhaps force cache=none.
I doubt, however, that we'll have time to work on this. Feel free to submit a patch, or propose this to the upstream virt-manager community.