After latest update, RAM is not honored on a specific VM

[stich86]

Hi all,

i've currently running this version of PVE

pve-manager/8.2.2/9355359cd7afbae4 (running kernel: 6.8.4-3-pve)

And I've this machine that is currently running with less da 1GB of RAM instead of 6GB configured

root@pve:/etc/pve/qemu-server# qm list
      VMID NAME                 STATUS     MEM(MB)    BOOTDISK(GB) PID
       310 loki                 running    6144             160.00 3111784

Doing a free on the VM, ram is only 1/6:

lynx@loki:~$ free -m
               total        used        free      shared  buff/cache   available
Mem:             894         756          87           2         199         137
Swap:            979         481         498

Balooing is disable... this is also the currently ps and I see varius 512MB of chuck for RAM:

/usr/bin/kvm -id 310 -name loki,debug-threads=on -no-shutdown -chardev socket,id=qmp,path=/var/run/qemu-server/310.qmp,server=on,wait=off -mon chardev=qmp,mode=control -chardev socket,id=qmp-event,path=/var/run/qmeventd.sock,reconnect=5 -mon chardev=qmp-event,mode=control -pidfile /var/run/qemu-server/310.pid -daemonize -smbios type=1,uuid=8f863775-c14f-4683-a285-8871bc788d53 -smp 1,sockets=1,cores=6,maxcpus=6 -device host-x86_64-cpu,id=cpu2,socket-id=0,core-id=1,thread-id=0 -device host-x86_64-cpu,id=cpu3,socket-id=0,core-id=2,thread-id=0 -device host-x86_64-cpu,id=cpu4,socket-id=0,core-id=3,thread-id=0 -device host-x86_64-cpu,id=cpu5,socket-id=0,core-id=4,thread-id=0 -device host-x86_64-cpu,id=cpu6,socket-id=0,core-id=5,thread-id=0 -nodefaults -boot menu=on,strict=on,reboot-timeout=1000,splash=/usr/share/qemu-server/bootsplash.jpg -vnc unix:/var/run/qemu-server/310.vnc,password=on -cpu host,+kvm_pv_eoi,+kvm_pv_unhalt -m size=1024,slots=255,maxmem=4194304M -object memory-backend-ram,id=ram-node0,size=1024M -numa node,nodeid=0,cpus=0-5,memdev=ram-node0 -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=0 -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=0 -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=0 -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=0 -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=0 -object iothread,id=iothread-virtioscsi0 -readconfig /usr/share/qemu-server/pve-q35-4.0.cfg -device vmgenid,guid=ba1e6745-28dc-4894-9b4a-c03c6d2dbd60 -device usb-tablet,id=tablet,bus=ehci.0,port=1 -device VGA,id=vga,bus=pcie.0,addr=0x1 -chardev socket,path=/var/run/qemu-server/310.qga,server=on,wait=off,id=qga0 -device virtio-serial,id=qga0,bus=pci.0,addr=0x8 -device virtserialport,chardev=qga0,name=org.qemu.guest_agent.0 -iscsi initiator-name=iqn.1993-08.org.debian:01:ecbbfb663d66 -drive if=none,id=drive-ide2,media=cdrom,aio=io_uring -device ide-cd,bus=ide.1,unit=0,drive=drive-ide2,id=ide2,bootindex=101 -device virtio-scsi-pci,id=virtioscsi0,bus=pci.3,addr=0x1,iothread=iothread-virtioscsi0 -drive file=/dev/pve/vm-310-disk-0,if=none,id=drive-scsi0,format=raw,cache=none,aio=io_uring,detect-zeroes=on -device scsi-hd,bus=virtioscsi0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0,id=scsi0,bootindex=100 -netdev type=tap,id=net0,ifname=tap310i0,script=/var/lib/qemu-server/pve-bridge,downscript=/var/lib/qemu-server/pve-bridgedown,vhost=on -device virtio-net-pci,mac=BC:24:11:2C:E7:75,netdev=net0,bus=pci.0,addr=0x12,id=net0,rx_queue_size=1024,tx_queue_size=256,bootindex=102 -machine type=q35+pve0

any advice? I cannot run all my stuff on this VM because it start to swap like hell...

Already tried to restore from backup, but still same issue

Thanks in advance!

 

[leesteken]

This is expected when memory hotplug is enabled but the operating system inside the VM was not prepared properly (to automatically enable and use hot-plugged memory): https://pve.proxmox.com/wiki/Hotplug_(qemu_disk,nic,cpu,memory)#CPU_and_Memory_Hotplug . This also happened before the latest update, so I don't think those are related.

 

[stich86]

This is expected when memory hotplug is enabled but the operating system inside the VM was not prepared properly (to automatically enable and use hot-plugged memory): https://pve.proxmox.com/wiki/Hotplug_(qemu_disk,nic,cpu,memory)#CPU_and_Memory_Hotplug . This also happened before the latest update, so I don't think those are related.

Yes I’ve found this checking other VMs.
This one was migrated from Ubuntu Server to Debian, so may be Ubuntu has HotPlug already configured

Thx for the info!