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Re: qemu-4.0.1: vhost_region_add_section:Section rounded to 0 prior to p

From: Peter Lieven
Subject: Re: qemu-4.0.1: vhost_region_add_section:Section rounded to 0 prior to previous a0000
Date: Thu, 9 Jan 2020 19:19:59 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2

Am 08.01.20 um 16:04 schrieb Dr. David Alan Gilbert:
* Peter Lieven (address@hidden) wrote:

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):


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

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=,port=2001,id=qga0,server,nowait,nodelay -device virtio-serial -device virtserialport,chardev=qga0,name=org.qemu.guest_agent.0



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