kvm-82 + 2.6.28.1 repeated crash under heavy virt IO

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Hi list,

Got 2 crashes on the same guest in 2 days when under heavy IO (virt-io).
There's not much to go at:
3785 Bus error               ./qemu-19 -clock dynticks -usbdevice tablet
- -m 768 -monitor telnet:127.0.0.1:10019,server,nowait -L ./ -kernel
./bzImage-2.6.28.1 -append "earlyprintk=serial,ttyS0,115200,keep
console=ttyS0,115200 root=/dev/vda nolapic selinux=1 enforcing=0"
- -nographic -drive file=./vm/root_fs,if=virtio,boot=on -net
nic,vlan=0,macaddr=fe:f0:00:00:00:18,model=virtio -net
tap,vlan=0,ifname=tap24,script=no

dmesg:
[6358708.743157] qemu-19[3786] trap stack segment ip:7ffbbe76b9e5
sp:41f9de30 error:0

More info:
QEMU PC emulator version 0.9.1 (kvm-82), Copyright (c) 2003-2008 Fabrice
Bellard
Host: Linux 2.6.27.5 #6 SMP x86_64 AMD Athlon(tm) X2 Dual Core Processor
BE-2300 AuthenticAMD GNU/Linux

Not sure if this is relevant, but on boot kvm reports in dmesg:
[6358788.212579] kvm: 21229: cpu0 unhandled wrmsr: 0xc0010117 data 0
[6358792.992848] kvm: 21229: cpu0 unhandled rdmsr: 0x417


Cheers
Antoine
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