memory hotplug problem with net vmbr

Martin Hlavacek

New Member
Aug 18, 2016
1
0
1
36
Hello, we have just successfully installed proxmox ve and I have found one problem. I am not able to start virtual instance if the vm has memory hotplug enabled, memory is set higher that 32GB and net interface is bridged (via vmbr). If I disable net bridge and I will use NAT that I can start vm. It is very strange. Hypervizor has enough memory and I have test it on several different hypervizors with the same proxmox system.

Do you have any idea where cloud be the problem? Thank you for any help.

root@phnsvmh02:~# pveversion
pve-manager/4.2-15/6669ad2c (running kernel: 4.4.13-1-pve)

ERROR in proxmox gui inside start task:
kvm: -device pc-dimm,id=dimm58,memdev=mem-dimm58,node=0: a used vhost backend has no free memory slots left
TASK ERROR: start failed: command '/usr/bin/kvm -id 123 -chardev 'socket,id=qmp,path=/var/run/qemu-server/123.qmp,server,nowait' -mon 'chardev=qmp,mode=control' -pidfile /var/run/qemu-server/123.pid -daemonize -smbios 'type=1,uuid=bf3dba72-6aa6-451b-8024-547a67cdeb1f' -name testvm2 -smp '2,sockets=2,cores=4,maxcpus=8' -nodefaults -boot 'menu=on,strict=on,reboot-timeout=1000' -vga cirrus -vnc unix:/var/run/qemu-server/123.vnc,x509,password -cpu kvm64,+lahf_lm,+sep,+kvm_pv_unhalt,+kvm_pv_eoi,enforce -m 'size=1024,slots=255,maxmem=4194304M' -object 'memory-backend-ram,id=ram-node0,size=512M' -numa 'node,nodeid=0,cpus=0-3,memdev=ram-node0' -object 'memory-backend-ram,id=ram-node1,size=512M' -numa 'node,nodeid=1,cpus=4-7,memdev=ram-node1' -object 'memory-backend-ram,id=mem-dimm0,size=512M' -device 'pc-dimm,id=dimm0,memdev=mem-dimm0,node=0' -object 'memory-backend-ram,id=mem-dimm1,size=512M' -device 'pc-dimm,id=dimm1,memdev=mem-dimm1,node=1' -object 'memory-backend-ram,id=mem-dimm2,size=512M' -device 'pc-dimm,id=dimm2,memdev=mem-dimm2,node=0' -object 'memory-backend-ram,id=mem-dimm3,size=512M' -device 'pc-dimm,id=dimm3,memdev=mem-dimm3,node=1' -object 'memory-backend-ram,id=mem-dimm4,size=512M' -device 'pc-dimm,id=dimm4,memdev=mem-dimm4,node=0' -object 'memory-backend-ram,id=mem-dimm5,size=512M' -device 'pc-dimm,id=dimm5,memdev=mem-dimm5,node=1' -object 'memory-backend-ram,id=mem-dimm6,size=512M' -device 'pc-dimm,id=dimm6,memdev=mem-dimm6,node=0' -object 'memory-backend-ram,id=mem-dimm7,size=512M' -device 'pc-dimm,id=dimm7,memdev=mem-dimm7,node=1' -object 'memory-backend-ram,id=mem-dimm8,size=512M' -device 'pc-dimm,id=dimm8,memdev=mem-dimm8,node=0' -object 'memory-backend-ram,id=mem-dimm9,size=512M' -device 'pc-dimm,id=dimm9,memdev=mem-dimm9,node=1' -object 'memory-backend-ram,id=mem-dimm10,size=512M' -device 'pc-dimm,id=dimm10,memdev=mem-dimm10,node=0' -object 'memory-backend-ram,id=mem-dimm11,size=512M' -device 'pc-dimm,id=dimm11,memdev=mem-dimm11,node=1' -object 'memory-backend-ram,id=mem-dimm12,size=512M' -device 'pc-dimm,id=dimm12,memdev=mem-dimm12,node=0' -object 'memory-backend-ram,id=mem-dimm13,size=512M' -device 'pc-dimm,id=dimm13,memdev=mem-dimm13,node=1' -object 'memory-backend-ram,id=mem-dimm14,size=512M' -device 'pc-dimm,id=dimm14,memdev=mem-dimm14,node=0' -object 'memory-backend-ram,id=mem-dimm15,size=512M' -device 'pc-dimm,id=dimm15,memdev=mem-dimm15,node=1' -object 'memory-backend-ram,id=mem-dimm16,size=512M' -device 'pc-dimm,id=dimm16,memdev=mem-dimm16,node=0' -object 'memory-backend-ram,id=mem-dimm17,size=512M' -device 'pc-dimm,id=dimm17,memdev=mem-dimm17,node=1' -object 'memory-backend-ram,id=mem-dimm18,size=512M' -device 'pc-dimm,id=dimm18,memdev=mem-dimm18,node=0' -object 'memory-backend-ram,id=mem-dimm19,size=512M' -device 'pc-dimm,id=dimm19,memdev=mem-dimm19,node=1' -object 'memory-backend-ram,id=mem-dimm20,size=512M' -device 'pc-dimm,id=dimm20,memdev=mem-dimm20,node=0' -object 'memory-backend-ram,id=mem-dimm21,size=512M' -device 'pc-dimm,id=dimm21,memdev=mem-dimm21,node=1' -object 'memory-backend-ram,id=mem-dimm22,size=512M' -device 'pc-dimm,id=dimm22,memdev=mem-dimm22,node=0' -object 'memory-backend-ram,id=mem-dimm23,size=512M' -device 'pc-dimm,id=dimm23,memdev=mem-dimm23,node=1' -object 'memory-backend-ram,id=mem-dimm24,size=512M' -device 'pc-dimm,id=dimm24,memdev=mem-dimm24,node=0' -object 'memory-backend-ram,id=mem-dimm25,size=512M' -device 'pc-dimm,id=dimm25,memdev=mem-dimm25,node=1' -object 'memory-backend-ram,id=mem-dimm26,size=512M' -device 'pc-dimm,id=dimm26,memdev=mem-dimm26,node=0' -object 'memory-backend-ram,id=mem-dimm27,size=512M' -device 'pc-dimm,id=dimm27,memdev=mem-dimm27,node=1' -object 'memory-backend-ram,id=mem-dimm28,size=512M' -device 'pc-dimm,id=dimm28,memdev=mem-dimm28,node=0' -object 'memory-backend-ram,id=mem-dimm29,size=512M' -device 'pc-dimm,id=dimm29,memdev=mem-dimm29,node=1' -object 'memory-backend-ram,id=mem-dimm30,size=512M' -device 'pc-dimm,id=dimm30,memdev=mem-dimm30,node=0' -object 'memory-backend-ram,id=mem-dimm31,size=512M' -device 'pc-dimm,id=dimm31,memdev=mem-dimm31,node=1' -object 'memory-backend-ram,id=mem-dimm32,size=1024M' -device 'pc-dimm,id=dimm32,memdev=mem-dimm32,node=0' -object 'memory-backend-ram,id=mem-dimm33,size=1024M' -device 'pc-dimm,id=dimm33,memdev=mem-dimm33,node=1' -object 'memory-backend-ram,id=mem-dimm34,size=1024M' -device 'pc-dimm,id=dimm34,memdev=mem-dimm34,node=0' -object 'memory-backend-ram,id=mem-dimm35,size=1024M' -device 'pc-dimm,id=dimm35,memdev=mem-dimm35,node=1' -object 'memory-backend-ram,id=mem-dimm36,size=1024M' -device 'pc-dimm,id=dimm36,memdev=mem-dimm36,node=0' -object 'memory-backend-ram,id=mem-dimm37,size=1024M' -device 'pc-dimm,id=dimm37,memdev=mem-dimm37,node=1' -object 'memory-backend-ram,id=mem-dimm38,size=1024M' -device 'pc-dimm,id=dimm38,memdev=mem-dimm38,node=0' -object 'memory-backend-ram,id=mem-dimm39,size=1024M' -device 'pc-dimm,id=dimm39,memdev=mem-dimm39,node=1' -object 'memory-backend-ram,id=mem-dimm40,size=1024M' -device 'pc-dimm,id=dimm40,memdev=mem-dimm40,node=0' -object 'memory-backend-ram,id=mem-dimm41,size=1024M' -device 'pc-dimm,id=dimm41,memdev=mem-dimm41,node=1' -object 'memory-backend-ram,id=mem-dimm42,size=1024M' -device 'pc-dimm,id=dimm42,memdev=mem-dimm42,node=0' -object 'memory-backend-ram,id=mem-dimm43,size=1024M' -device 'pc-dimm,id=dimm43,memdev=mem-dimm43,node=1' -object 'memory-backend-ram,id=mem-dimm44,size=1024M' -device 'pc-dimm,id=dimm44,memdev=mem-dimm44,node=0' -object 'memory-backend-ram,id=mem-dimm45,size=1024M' -device 'pc-dimm,id=dimm45,memdev=mem-dimm45,node=1' -object 'memory-backend-ram,id=mem-dimm46,size=1024M' -device 'pc-dimm,id=dimm46,memdev=mem-dimm46,node=0' -object 'memory-backend-ram,id=mem-dimm47,size=1024M' -device 'pc-dimm,id=dimm47,memdev=mem-dimm47,node=1' -object 'memory-backend-ram,id=mem-dimm48,size=1024M' -device 'pc-dimm,id=dimm48,memdev=mem-dimm48,node=0' -object 'memory-backend-ram,id=mem-dimm49,size=1024M' -device 'pc-dimm,id=dimm49,memdev=mem-dimm49,node=1' -object 'memory-backend-ram,id=mem-dimm50,size=1024M' -device 'pc-dimm,id=dimm50,memdev=mem-dimm50,node=0' -object 'memory-backend-ram,id=mem-dimm51,size=1024M' -device 'pc-dimm,id=dimm51,memdev=mem-dimm51,node=1' -object 'memory-backend-ram,id=mem-dimm52,size=1024M' -device 'pc-dimm,id=dimm52,memdev=mem-dimm52,node=0' -object 'memory-backend-ram,id=mem-dimm53,size=1024M' -device 'pc-dimm,id=dimm53,memdev=mem-dimm53,node=1' -object 'memory-backend-ram,id=mem-dimm54,size=1024M' -device 'pc-dimm,id=dimm54,memdev=mem-dimm54,node=0' -object 'memory-backend-ram,id=mem-dimm55,size=1024M' -device 'pc-dimm,id=dimm55,memdev=mem-dimm55,node=1' -object 'memory-backend-ram,id=mem-dimm56,size=1024M' -device 'pc-dimm,id=dimm56,memdev=mem-dimm56,node=0' -object 'memory-backend-ram,id=mem-dimm57,size=1024M' -device 'pc-dimm,id=dimm57,memdev=mem-dimm57,node=1' -object 'memory-backend-ram,id=mem-dimm58,size=1024M' -device 'pc-dimm,id=dimm58,memdev=mem-dimm58,node=0' -object 'memory-backend-ram,id=mem-dimm59,size=1024M' -device 'pc-dimm,id=dimm59,memdev=mem-dimm59,node=1' -object 'memory-backend-ram,id=mem-dimm60,size=1024M' -device 'pc-dimm,id=dimm60,memdev=mem-dimm60,node=0' -object 'memory-backend-ram,id=mem-dimm61,size=1024M' -device 'pc-dimm,id=dimm61,memdev=mem-dimm61,node=1' -object 'memory-backend-ram,id=mem-dimm62,size=1024M' -device 'pc-dimm,id=dimm62,memdev=mem-dimm62,node=0' -k en-us -device 'pci-bridge,id=pci.2,chassis_nr=2,bus=pci.0,addr=0x1f' -device 'pci-bridge,id=pci.1,chassis_nr=1,bus=pci.0,addr=0x1e' -device 'piix3-usb-uhci,id=uhci,bus=pci.0,addr=0x1.0x2' -device 'usb-tablet,id=tablet,bus=uhci.0,port=1' -chardev 'socket,path=/var/run/qemu-server/123.qga,server,nowait,id=qga0' -device 'virtio-serial,id=qga0,bus=pci.0,addr=0x8' -device 'virtserialport,chardev=qga0,name=org.qemu.guest_agent.0' -device 'virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3' -iscsi 'initiator-name=iqn.1993-08.org.debian:01:146eb8361451' -drive 'if=none,id=drive-ide2,media=cdrom,aio=threads' -device 'ide-cd,bus=ide.1,unit=0,drive=drive-ide2,id=ide2,bootindex=200' -drive 'file=/mnt/l0201/images/123/vm-123-disk-1.qcow2,if=none,id=drive-virtio0,format=qcow2,cache=none,aio=native,detect-zeroes=on' -device 'virtio-blk-pci,drive=drive-virtio0,id=virtio0,bus=pci.0,addr=0xa,bootindex=100' -netdev 'type=tap,id=net0,ifname=tap123i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on' -device 'virtio-net-pci,mac=36:30:37:35:63:38,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300'' failed: exit code 1

VM config:
agent: 1
bootdisk: virtio0
cores: 4
hotplug: disk,network,usb,memory,cpu
ide2: none,media=cdrom
memory: 49152
name: testvm2
net0: virtio=36:30:37:35:63:38,bridge=vmbr238
numa: 1
ostype: l26
smbios1: uuid=bf3dba72-6aa6-451b-8024-547a67cdeb1f
sockets: 2
vcpus: 2
virtio0: l0201:123/vm-123-disk-1.qcow2,size=30G
 

About

The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!