Package: qemu-kvm Version: 0.12.5+dfsg-1 Severity: normal Distribution: testing Architecture: amd64
Dear Maintainers, after the update to the qemu-kvm package to version 0.12.5+dfsg-1 the write performance of my virtual machines is absolutely solw! I've tested this with Windows 7, Windows XP Prof. and debian testing. E.g. nearly 10 mins for 600MB (Win7 hybernate). Here is an example of my kvm start parameters: kvm -drive file=/home/virtual/KVM/win7.ovl,index=0,media=disk,cache=writeback -k de -m 1536m -monitor stdio -name "Windows 7" -net nic,model=virtio,macaddr=52:54:00:12:34:57 -net user -rtc base=localtime -smp 2 -usb -usbdevice tablet -vga std -vnc :3 Changing the cache value to cache=none or writethrough has no effect to the write performance. Downgrading back to qemu-kvm-0.12.4+dfsg-1 solved the problem for me (win7 hybernate writes 600MB in nearly 30 secs.) Best regards Alexander Loob
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