Thanks Christian. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1847105
Title: very slow disk creation, snapshotting Status in virt-manager: Confirmed Status in Native ZFS for Linux: New Status in libvirt package in Ubuntu: Triaged Status in virt-manager package in Ubuntu: Triaged Status in zfs-linux package in Ubuntu: New Status in libvirt source package in Bionic: Invalid Status in virt-manager source package in Bionic: Invalid Status in zfs-linux source package in Bionic: Won't Fix Status in libvirt source package in Disco: Won't Fix Status in virt-manager source package in Disco: Won't Fix Status in zfs-linux source package in Disco: Won't Fix Status in libvirt source package in Focal: Triaged Status in libvirt source package in Groovy: Triaged Bug description: This is a regression in eoan for me. I use virt-manager to create vms, and I noticed that creating one now takes more than a minute. Looking at the process listing while the backing disk is being created, I see this qemu-img command line: 15658 ? Ssl 0:00 /usr/sbin/libvirtd 23726 ? Sl 0:04 \_ /usr/bin/qemu-img create -f qcow2 -o preallocation=falloc,compat=1.1,lazy_refcounts /var/lib/libvirt/images/live-server.qcow2 41943040K If I run qemu-img with that preallocation parameter set, even on bionic, then it also takes a very long time. On eoan, for comparison: andreas@nsn7:~$ time qemu-img create -f qcow2 no-prealloc-image.qcow2 40G Formatting 'no-prealloc-image.qcow2', fmt=qcow2 size=42949672960 cluster_size=65536 lazy_refcounts=off refcount_bits=16 real 0m0,016s user 0m0,010s sys 0m0,006s andreas@nsn7:~$ qemu-img info no-prealloc-image.qcow2 image: no-prealloc-image.qcow2 file format: qcow2 virtual size: 40G (42949672960 bytes) disk size: 17K cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false andreas@nsn7:~$ du -hs no-prealloc-image.qcow2 17K no-prealloc-image.qcow2 andreas@nsn7:~$ and now with preallocation=falloc: andreas@nsn7:~$ time qemu-img create -f qcow2 -o preallocation=falloc with-prealloc-image.qcow2 40G Formatting 'with-prealloc-image.qcow2', fmt=qcow2 size=42949672960 cluster_size=65536 preallocation=falloc lazy_refcounts=off refcount_bits=16 real 1m43,196s user 0m3,564s sys 1m26,720s andreas@nsn7:~$ qemu-img info with-prealloc-image.qcow2 image: with-prealloc-image.qcow2 file format: qcow2 virtual size: 40G (42949672960 bytes) disk size: 2.7M cluster_size: 65536 Format specific information: compat: 1.1 lazy refcounts: false refcount bits: 16 corrupt: false andreas@nsn7:~$ du -hs with-prealloc-image.qcow2 2,8M with-prealloc-image.qcow2 andreas@nsn7:~$ ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: libvirt-daemon 5.4.0-0ubuntu5 ProcVersionSignature: Ubuntu 5.3.0-13.14-generic 5.3.0 Uname: Linux 5.3.0-13-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu7 Architecture: amd64 Date: Mon Oct 7 11:36:03 2019 InstallationDate: Installed on 2019-10-07 (0 days ago) InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Beta amd64 (20191006) SourcePackage: libvirt UpgradeStatus: No upgrade log present (probably fresh install) modified.conffile..etc.libvirt.nwfilter.allow-arp.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/allow-arp.xml'] modified.conffile..etc.libvirt.nwfilter.allow-dhcp-server.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/allow-dhcp-server.xml'] modified.conffile..etc.libvirt.nwfilter.allow-dhcp.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/allow-dhcp.xml'] modified.conffile..etc.libvirt.nwfilter.allow-incoming-ipv4.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/allow-incoming-ipv4.xml'] modified.conffile..etc.libvirt.nwfilter.allow-ipv4.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/allow-ipv4.xml'] modified.conffile..etc.libvirt.nwfilter.clean-traffic-gateway.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/clean-traffic-gateway.xml'] modified.conffile..etc.libvirt.nwfilter.clean-traffic.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/clean-traffic.xml'] modified.conffile..etc.libvirt.nwfilter.no-arp-ip-spoofing.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/no-arp-ip-spoofing.xml'] modified.conffile..etc.libvirt.nwfilter.no-arp-mac-spoofing.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/no-arp-mac-spoofing.xml'] modified.conffile..etc.libvirt.nwfilter.no-arp-spoofing.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/no-arp-spoofing.xml'] modified.conffile..etc.libvirt.nwfilter.no-ip-multicast.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/no-ip-multicast.xml'] modified.conffile..etc.libvirt.nwfilter.no-ip-spoofing.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/no-ip-spoofing.xml'] modified.conffile..etc.libvirt.nwfilter.no-mac-broadcast.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/no-mac-broadcast.xml'] modified.conffile..etc.libvirt.nwfilter.no-mac-spoofing.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/no-mac-spoofing.xml'] modified.conffile..etc.libvirt.nwfilter.no-other-l2-traffic.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/no-other-l2-traffic.xml'] modified.conffile..etc.libvirt.nwfilter.no-other-rarp-traffic.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/no-other-rarp-traffic.xml'] modified.conffile..etc.libvirt.nwfilter.qemu-announce-self-rarp.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/qemu-announce-self-rarp.xml'] modified.conffile..etc.libvirt.nwfilter.qemu-announce-self.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/nwfilter/qemu-announce-self.xml'] modified.conffile..etc.libvirt.qemu.conf: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/qemu.conf'] modified.conffile..etc.libvirt.qemu.networks.default.xml: [inaccessible: [Errno 13] Permission denied: '/etc/libvirt/qemu/networks/default.xml'] To manage notifications about this bug go to: https://bugs.launchpad.net/virt-manager/+bug/1847105/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp