problem with hotplug and 64GB ram

[pschonmann]

Still have issues
pve-manager/8.0.4/d258a813cfa6b390 (running kernel: 6.2.16-19-pve)

Testing vps config

agent: 1
boot: order=ide2
cores: 128
cpu: x86-64-v2-AES
hotplug: disk,network,usb,memory,cpu
ide2: none,media=cdrom
memory: 61440
meta: creation-qemu=8.0.2,ctime=1698709821
name: bla
numa: 1
ostype: l26
scsihw: virtio-scsi-single
smbios1: uuid=c655e14f-d994-411e-81ca-f7d55284060c
sockets: 1
vcpus: 4
vmgenid: 05e14755-9070-432e-8883-410032859a27

 

[are]

Did you set max_mem_regions as described earlier?

 

[pschonmann]

Did you set max_mem_regions as described earlier?

YES

root@proxmox1:~# cat /etc/modprobe.d/modprobe.conf
options vhost max_mem_regions=128

 

[are]

I assume that you also tested if it gets correctly applied (via cat /sys/module/vhost/parameters/max_mem_regions) and if values like 512 work...

 

[pschonmann]

Yes, i tried

echo "options vhost max_mem_regions=512" > /etc/modprobe.d/vhost.conf
rmmod vhost_net
rmmod vhost
modprobe vhost_net
cat /sys/module/vhost/parameters/max_mem_regions
# 512

 

[thaf]

Same issue on proxmox 7.4-17, but at least everything works if you're generous and add an extra GB.

 

[pschonmann]

Same issue on proxmox 7.4-17, but at least everything works if you're generous and add an extra GB.

Did you fixed it when you added 1024MiB to actual setup ? for example 64GiB => 65GiB ?

 

[thaf]

Did you fixed it when you added 1024MiB to actual setup ? for example 64GiB => 65GiB ?

Yes, I went with 66560 instead of 65536 in the VM definition and that fixed it. It is a silly bug.

 

[pschonmann]

Yes, I went with 66560 instead of 65536 in the VM definition and that fixed it. It is a silly bug.

This is nasty and really works

 

[xoma11]

TASK ERROR: memory size (81920) must be aligned to 2048 for hotplugging
pve-manager/8.1.3

 

[Maksimus]

TASK ERROR: memory size (81920) must be aligned to 2048 for hotplugging
pve-manager/8.1.3

Add another 1GB of memory. It helped me, it was 64, I set it to 65 and everything worked.

 

[Nemesiz]

Old thread but I have the same problem.

If I set ram as hotplug and size 122880: TASK ERROR: memory size (122880) must be aligned to 4096 for hotplugging
If I change to 123904: Kernel panic - not syncing: System is deadlocked on memory

If I remove ram from hotplug and set the size 122880: everything is ok.

# pveversion -v
proxmox-ve: 8.1.0 (running kernel: 6.2.16-18-pve)
pve-manager: 8.1.3 (running version: 8.1.3/b46aac3b42da5d15)
proxmox-kernel-helper: 8.1.0
pve-kernel-6.2: 8.0.5
proxmox-kernel-6.5: 6.5.3-1
proxmox-kernel-6.5.3-1-pve: 6.5.3-1
proxmox-kernel-6.2.16-20-pve: 6.2.16-20
proxmox-kernel-6.2: 6.2.16-20
proxmox-kernel-6.2.16-18-pve: 6.2.16-18
ceph-fuse: 17.2.6-pve1+3
corosync: 3.1.7-pve3
criu: 3.17.1-2
glusterfs-client: 10.3-5
ifupdown2: 3.2.0-1+pmx8
ksm-control-daemon: 1.4-1
libjs-extjs: 7.0.0-4
libknet1: 1.28-pve1
libproxmox-acme-perl: 1.5.0
libproxmox-backup-qemu0: 1.4.1
libproxmox-rs-perl: 0.3.3
libpve-access-control: 8.0.7
libpve-apiclient-perl: 3.3.1
libpve-common-perl: 8.1.0
libpve-guest-common-perl: 5.0.6
libpve-http-server-perl: 5.0.5
libpve-rs-perl: 0.8.7
libpve-storage-perl: 8.0.5
libspice-server1: 0.15.1-1
lvm2: 2.03.16-2
lxc-pve: 5.0.2-4
lxcfs: 5.0.3-pve4
novnc-pve: 1.4.0-3
proxmox-backup-client: 3.1.2-1
proxmox-backup-file-restore: 3.1.2-1
proxmox-kernel-helper: 8.1.0
proxmox-mail-forward: 0.2.2
proxmox-mini-journalreader: 1.4.0
proxmox-widget-toolkit: 4.1.3
pve-cluster: 8.0.5
pve-container: 5.0.8
pve-docs: 8.1.3
pve-edk2-firmware: 4.2023.08-2
pve-firewall: 5.0.3
pve-firmware: 3.9-1
pve-ha-manager: 4.0.3
pve-i18n: 3.1.5
pve-qemu-kvm: 8.1.2-6
pve-xtermjs: 5.3.0-3
qemu-server: 8.0.10
smartmontools: 7.3-pve1
spiceterm: 3.3.0
swtpm: 0.8.0+pve1
vncterm: 1.8.0
zfsutils-linux: 2.2.2-pve1

 

[ptsbkhairul]

Old thread but I have the same problem.

If I set ram as hotplug and size 122880: TASK ERROR: memory size (122880) must be aligned to 4096 for hotplugging
If I change to 123904: Kernel panic - not syncing: System is deadlocked on memory

If I remove ram from hotplug and set the size 122880: everything is ok.

Hi,

Same situation, do we have workaround to achieve memory hotplug + 64 GB RAM VM. Already try +1 (65 GB) but still hit error

 

[dpearceFL]

Getting almost the same error message on Proxmox 8.1.4:

memory size (65536) must be aligned to 2048 for hotplugging

 

[dpearceFL]

Turning off memory hotplug is a work around. Still happening in Proxmox 8.1.4.