[Qemu-devel] vhost-user:Bad ram offset

[Linhaifeng]

Hi,all

VM use vhost-user backend cannot startup when memory bigger than 3.5G.The log 
print "Bad ram offset 100000000" .Is this a bug?

log：
[2014-11-01T08:39:07.245324Z] virtio_set_status:524 virtio-net device status is 
1 that means ACKNOWLEDGE
[2014-11-01T08:39:07.247225Z] virtio_set_status:524 virtio-balloon device 
status is 1 that means ACKNOWLEDGE
[2014-11-01T08:39:07.320191Z] virtio_set_status:524 virtio-net device status is 
3 that means DRIVER
Bad ram offset 100000000
[2014-11-01 08:39:07]: shutting down


command：
/usr/bin/qemu-system-x86_64 -name vm1
-smp 4
-drive 
file=/mnt/sdb/linhf/imgs/vm1.img,if=none,id=drive-ide0-0-0,format=raw,cache=none,aio=native
 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 \
-chardev socket,id=charnet0,path=/var/run/vhost-user/port1 -netdev 
type=vhost-user,id=hostnet0,chardev=charnet0 -device 
virtio-net-pci,netdev=hostnet0,id=net0,mac=00:00:00:00:00:01,bus=pci.0,addr=0x3 
\
-enable-kvm -mem-prealloc -object 
memory-backend-file,id=mem,size=3968M,mem-path=/dev/hugepages,share=on -numa 
node,memdev=mem

when memory is smaller than 3.5G VM would run well.


-- 
Regards,
Haifeng