Re: qemu-4.0.1: vhost_region_add_section:Section rounded to 0 prior to previous a0000

[Peter Lieven]

Am 08.01.20 um 16:04 schrieb Dr. David Alan Gilbert:
> * Peter Lieven (address@hidden) wrote:
> > Hi,
> >
> >
> > I have a Qemu 4.0.1 machine with vhost-net network adapter, thats polluting the 
> > log with the above message.
> >
> > Is this something known? Googling revealed the following patch in Nemu (with 
> > seems to be a Qemu fork from Intel):
> >
> > https://github.com/intel/nemu/commit/03940ded7f5370ce7492c619dccced114ef7f56e
> >
> >
> > The network stopped functioning. After a live-migration the vServer is 
> > reachable again.
> >
> >
> > Any ideas?
> What guest are you running and what does your qemu commandline look
> like?


Its running debian9. We have hundreds of other VMs with identical setup. Do not 
know why this one makes trouble.

Here is the cmdline:


/usr/bin/qemu-4.0.0  -enable-kvm  -M pc-i440fx-2.9  -nodefaults -netdev type=tap,id=guest0,script=no,downscript=no,ifname=tap0,vhost=on,vnet_hdr=on -device virtio-net-pci,netdev=guest0,mac=52:54:00:80:07:bc -iscsi 
initiator-name=iqn.2005-03.org.virtual-core:0025b51f006c,timeout=30 -object rng-random,filename=/dev/urandom,id=rng0 -device virtio-rng-pci,rng=rng0,max-bytes=65536,period=1000  -drive 
format=raw,discard=on,detect-zeroes=off,file=XXX,if=none,cache=writeback,aio=native,id=disk0 -device virtio-scsi-pci  -device scsi-hd,drive=disk0  -serial null  -parallel null  -m 1024,slots=16,maxmem=393216M  -smp 
1,sockets=64,cores=1,threads=1,maxcpus=64  -monitor tcp:0:4001,server,nowait,nodelay -vnc :1 -qmp tcp:0:3001,server,nowait,nodelay  -name 'debian9'  -drive index=2,media=cdrom,if=ide,aio=native,readonly=on  -boot order=c,menu=off  -k de  -pidfile 
/var/run/qemu/vm-5182.pid -mem-path /hugepages  -mem-prealloc  -cpu Westmere,+pcid,enforce -rtc base=utc -usb -device usb-tablet -no-hpet -vga vmware -chardev socket,host=127.0.0.1,port=2001,id=qga0,server,nowait,nodelay -device virtio-serial -device 
virtserialport,chardev=qga0,name=org.qemu.guest_agent.0


Thanks,

Peter