Seems to only crash the first time qemu is started after booting the host 
machine.
After the first crash, qemu will run solid for days if the host machine is not 
rebooted.
If I have an opportunity, I'll test if it also crashes after first start when 
kvm and/or kvm_intel modules are unloaded and reloaded.

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https://bugs.launchpad.net/bugs/818673

Title:
  virtio: trying to map MMIO memory

Status in QEMU:
  New

Bug description:
  Qemu host is Core i7, running Linux.  Guest is Windows XP sp3.
  Often, qemu will crash shortly after starting (1-5 minutes) with a statement 
"qemu-system-x86_64: virtio: trying to map MMIO memory"
  This has occured with qemu-kvm 0.14, qemu-kvm 0.14.1, qemu-0.15.0-rc0 and 
qemu 0.15.0-rc1.
  Qemu is started as such:
  qemu-system-x86_64 -cpu host -enable-kvm -pidfile /home/rick/qemu/hds/wxp.pid 
-drive file=/home/rick/qemu/hds/wxp.raw,if=virtio -m 768 -name WinXP -net 
nic,model=virtio -net user -localtime -usb -vga qxl -device virtio-serial 
-chardev spicevmc,name=vdagent,id=vdagent -device 
virtserialport,chardev=vdagent,name=com.redhat.spice.0 -spice 
port=1234,disable-ticketing -daemonize -monitor 
telnet:localhost:12341,server,nowait
  The WXP guest has virtio 1.1.16 drivers for net and scsi, and the most 
current spice binaries from spice-space.org.

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