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Old 09-30-2014, 04:20 AM   #1
Registered: Jan 2009
Location: Sydney, Australia
Distribution: Fedora,CentOS
Posts: 747

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qemu advice

Hi, I installed F21 alpha today and I am trying to avoid 3rd party repos. So VirtualBox is out.

I am giving QEMU a go without much joy. From a look at:

I need to create an image in which to host the VM and then boot into it. I create an image thus:

qemu-img create -f qcow2 fed.img 20G
Then I kick off the VM (I also tried boot -d with the same results):

qemu-system-x86_64 -cdrom Fedora-Live-Workstation-x86_64-21_Alpha1/Fedora-Live-Workstation-x86_64-21_Alpha-1.iso -hda fed.img -boot c -m 2048
Now I have a reasonably healthy system with 8GB of RAM, F21 itself flies however QEMU is pretty slow something like 15m to bring up the live OS (VirtualBox under F20 took something like 20s). And then when I get a Gnome desktop the lag between clicking an icon and actually seeing a response can be measured in 10s of seconds rather than anything like instantaneous. Long enough for you to wonder whether the keyclick was actually acknowledged. In fact I will go so far as to say it is unusable.

So, I must be getting something wrong.

Any tips on how to create an image and boot up the system I would be grateful. Am I missing something?

Old 09-30-2014, 04:31 AM   #2
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are you using KVM? See

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Old 09-30-2014, 04:41 AM   #3
Registered: Jan 2009
Location: Sydney, Australia
Distribution: Fedora,CentOS
Posts: 747

Original Poster
Rep: Reputation: 156Reputation: 156
are you using KVM?
No I wasn't. I added

to the qemu-system-x86_64 command and the live OS came up in the blinking of an eye I am just on my way out so I don't think I'll get a chance to read up further this evening. I'll get onto it in the morning.



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