The underlying fallocate mode/0 compat was added to upstream ZFS with the following commit:
commit f734301d2267cbb33eaffbca195fc93f1dae7b74 Author: adilger <adil...@dilger.ca> Date: Thu Jun 18 12:22:11 2020 -0600 linux: add basic fallocate(mode=0/2) compatibility While the change isn't too large for a SRU, I'd rather wait for this to land in the next release of ZFS in Ubuntu in 21.04 and see how well this new functionality works before backporting it to Groovy and Focal. ** Changed in: zfs-linux (Ubuntu Bionic) Status: New => Won't Fix ** Changed in: zfs-linux (Ubuntu) Importance: Undecided => Low -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1847105 Title: very slow disk creation, snapshotting To manage notifications about this bug go to: https://bugs.launchpad.net/virt-manager/+bug/1847105/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs