I've been dealing with this bug for some time on Fedora. Until
recently, I was using the VirtIO drivers from RHEV 2.2, which don't
suffer from this problem. As of Fedora 16, however, that isn't an
option, because they cause the guest to blue-screen early in the boot
process.
So ... I've been doing some more testing with the following setup:
Host:
Intel DQ67SW motherboard with Q67 chipset (including IOMMU)
BIOS version SWQ6710H.86A.0050.2011.0401.1409 (release date 04/01/2011)
Intel Core i7 2600, 4-cores, 8 threads, 3.4 GHz
16GB memory
Fedora 15 64-bit, fully updated including updates-testing repo
qemu-kvm-0.14.0-8.fc15.x86_64
libvirt-0.8.8-7.fc15.x86_64
kernel-2.6.41.6-1.fc15.x86_64
Guest:
Windows 7 Professional 32-bit, fully updated
2 VCPUs
3.5GB memory
Red Hat VirtIO Ethernet Adapter driver version 6.0.209.605 (9/20/2010)
Red Hat VirtIO SCSI Controller driver version 6.0.0.10 (9/20/2010)
(No VirtIO serial ports or channels defined)
(The VirtIO drivers are from http://alt.fedoraproject.org/pub/alt
/virtio-win/latest/images/.)
I have determined that disabling the Intel IOMMU has no effect; the
problem still occurs.
Perhaps more interestingly, it seems that the problem only occurs when I
am using the VirtIO SCSI *and* the VirtIO Ethernet drivers. It seems
that the problem does not occur if I only use one of the drivers; an IDE
disk with a VirtIO NIC seems to be stable, as does a VirtIO disk with an
e1000 NIC.
Now to the big question ... what the heck can be done to get this problem
fixed? I hope that everyone agrees that it's totally unacceptable for a
problem like this to sit unfixed for so long. I am more than willing to test
any patches, enable
debugging, etc.; just tell me what to do.
Thanks!
--
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devel-ml, which is subscribed to QEMU.
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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