[Qemu-discuss] performances of qemu 2.10.0
I have compiled and built from git qemu tag 2.10.0 (./configure --target-list=x86_64-softmmu --enable-debug) and I find it much more slow than the debian package that I used before. kvm is enabled. The mouse does not react, tests done with host debian wheezy on various Windows image, or stretch image. What do I miss ? PC
Re: [Qemu-discuss] performances of qemu 2.10.0
that all software debug builds are by default extremely slow, try a release build Am 27.09.2017 um 22:49 schrieb Pierre Couderc: I have compiled and built from git qemu tag 2.10.0 (./configure --target-list=x86_64-softmmu --enable-debug) and I find it much more slow than the debian package that I used before. kvm is enabled. The mouse does not react, tests done with host debian wheezy on various Windows image, or stretch image. What do I miss ? PC
[Qemu-discuss] Permission denied when using block-dirty-bitmap on dynamically-mounted backup drive.
I am using Qemu's block-dirty-bitmap features to perform full/incremental backups of my qcow2 images. Things are working great but when I go to perform the initial full backup command to create the bitmap I get "libvirt-49 Could not create file: Permission denied". I'm issuing these json-based commands to the qemu monitor via the virsh qemu-monitor-command command. Yes, the dest. dir is owned by libvirt-qemu.kvm user/group. The only time I get this permission error is when I'm trying to write backup qcow2 files to a dynamically-mounted external drive (USB, etc.). If I create a manual mount point for it and provide an entry in my fstab file, things work great. Any idea how I can do backups to destination disks that are auto-mounted (mounted automatically when I plug-in the external USB disk? The command I'm running is: virsh qemu-monitor-command ubuntu16.04 --pretty \ '{"execute": "transaction",' \ '"arguments":' \ '{' \ '"actions":' \ '[' \ '{"type": "block-dirty-bitmap-add",' \ ' "data": {"node": "drive-virtio-disk1", "name": "bitmap0"}' \ '},' \ '{"type": "drive-backup",' \ ' "data": {"device": "drive-virtio-disk1",' \ ' "target": "/media/mike/Seagate2TB/backups/qemu/ubuntu16.04/2014-09-24/ubuntu16.04_full_backup_2017-09-24.qcow2",' \ ' "sync": "full", "format": "qcow2"' \ ' }' \ '}' \ ']' \ '}' \ '}' Thanks. Mike
Re: [Qemu-discuss] performances of qemu 2.10.0
Thank you, I try that. As i ma new to building qemu, I had strictly followed the wiki... On 28/09/2017 05:03, Dennis Luehring wrote: that all software debug builds are by default extremely slow, try a release build Am 27.09.2017 um 22:49 schrieb Pierre Couderc: I have compiled and built from git qemu tag 2.10.0 (./configure --target-list=x86_64-softmmu --enable-debug) and I find it much more slow than the debian package that I used before. kvm is enabled. The mouse does not react, tests done with host debian wheezy on various Windows image, or stretch image. What do I miss ? PC