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From: Vadim Rozenfeld <vrozenfe@redhat.com>
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Date: Sun, 31 Jul 2011 21:43:20 +0300
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Subject: Re: [Qemu-devel] [Bug 818673] [NEW] virtio: trying to map MMIO
 memory
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To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: qemu-devel@nongnu.org, Bug 818673 <818673@bugs.launchpad.net>

On Sun, 2011-07-31 at 18:54 +0100, Stefan Hajnoczi wrote:
> On Sun, Jul 31, 2011 at 12:01 AM, Rick Vernam <818673@bugs.launchpad.net> wrote:
> > Public bug reported:
> >
> > 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.
> 
> This is probably a guest virtio driver bug.
> 
> Vadim: Any known issues like this with 1.1.16?
No, it something new to me.
Will try to reproduce and fix it.
Thank you,
Vadim.  
> 
> Stefan