I'm having a problem with a virtual machine created on an F-11 host that I didn't have with an F-10 host, and I'm wondering if I've misconfigured something or missed a trick somewhere. I'm doing some custom Linux kernel work for my employer, and I'm using a small collection of virtual machines to test it. In the short time I've had F-11 on my host machine, I've seen that virtual disk performance is noticeably worse than it was with F-10. My virtual machines regularly spew soft lockup messages to the system log, always with backtraces that show the process is being starved of the disk. The tests put a lot of stress on the disk, because this custom kernel work is going to help some overloaded servers deal with the load.
It's actually working pretty well on the real machines with real disks, but with the upgrade to F-11, my test VMs have become almost useless for testing further development work. Before I take the drastic step of rolling back to F-10, what factors affect the virtual disk performance?
I created both the F-10 and F-11 machines with virt-manager, if that matters.
Thanks,