[Qemu-devel] [Bug 818673] Re: virtio: trying to map MMIO memory

[David Rando]

I have the same problem. I'm using the packages from the Sergei ppa with
spice enabled on a server with 9 windows xp machines and 1 linux (ubuntu
10.04) one. Ubuntu is rock solid and never crash, but the windows
machines do randomnly. I've updated everything i could (using the
version from spice-space.org), i've disabled the memory ballooning,
disabled spice etc... but it's always the same. It just crash with that
message.

I guess it's a driver problem. I've searched on google and found some
clues (there's a guy porting spice drivers to BSD and got that problem
and could resolve it).

If i can do a test that helps, here i am. I've tried a few things but
i'm out of ideas.

With my test, the only thing that all the machines had always enabled is
the virtio storage driver. I've tried disabling the network one and the
memory one but no luck, so maybe it's related to the harddisk
controller. (i can't disable it because windows doesn't like to mess
with the hard disk controller, you know).

Thanks a lot ;-)

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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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