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

["Dr. David Alan Gilbert" <dgilbert@redhat.com>]

* Peter Lieven (pl@kamp.de) wrote:
> Am 08.01.20 um 16:04 schrieb Dr. David Alan Gilbert:
> > * Peter Lieven (pl@kamp.de) 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.

Could you extract an 'info mtree' from it - particularly the
'address-space: memory' near the top.


> 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

All pretty boring stuff. hmm.

Dave

> 
> Thanks,
> 
> Peter
> 
> 
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK