CT: unable to change memory online

[dale]

Hello, this is running containers only related (VMs - OK), webui result - the same.

~# pct set 120 --memory 10240
400 Parameter verification failed.
memory: unable to hotplug memory: closing file '/sys/fs/cgroup/memory///lxc/120/memory.limit_in_bytes' failed - Invalid argument

pct set <vmid> [OPTIONS]

or

~# echo 10737418240 >/sys/fs/cgroup/memory///lxc/120/memory.limit_in_bytes
bash: echo: write error: Invalid argument

~# pveversion -v
proxmox-ve: 6.2-1 (running kernel: 5.4.41-1-pve)
pve-manager: 6.2-6 (running version: 6.2-6/ee1d7754)
pve-kernel-5.4: 6.2-2
pve-kernel-helper: 6.2-2
pve-kernel-5.4.41-1-pve: 5.4.41-1
ceph-fuse: 14.2.9-pve1
corosync: 3.0.3-pve1
criu: 3.11-3
glusterfs-client: 5.5-3
ifupdown2: 3.0.0-1+pve2
ksm-control-daemon: 1.3-1
libjs-extjs: 6.0.1-10
libknet1: 1.15-pve1
libproxmox-acme-perl: 1.0.4
libpve-access-control: 6.1-1
libpve-apiclient-perl: 3.0-3
libpve-common-perl: 6.1-3
libpve-guest-common-perl: 3.0-10
libpve-http-server-perl: 3.0-5
libpve-storage-perl: 6.1-8
libqb0: 1.0.5-1
libspice-server1: 0.14.2-4~pve6+1
lvm2: 2.03.02-pve4
lxc-pve: 4.0.2-1
lxcfs: 4.0.3-pve2
novnc-pve: 1.1.0-1
openvswitch-switch: 2.12.0-1
proxmox-mini-journalreader: 1.1-1
proxmox-widget-toolkit: 2.2-7
pve-cluster: 6.1-8
pve-container: 3.1-8
pve-docs: 6.2-4
pve-edk2-firmware: 2.20200229-1
pve-firewall: 4.1-2
pve-firmware: 3.1-1
pve-ha-manager: 3.0-9
pve-i18n: 2.1-3
pve-qemu-kvm: 5.0.0-4
pve-xtermjs: 4.3.0-1
qemu-server: 6.2-3
smartmontools: 7.1-pve2
spiceterm: 3.1-1
vncterm: 1.6-1
zfsutils-linux: 0.8.4-pve1

 

[oguz]

hi,

i was able to reproduce the error, i will take a look at fixing it.

in my testing it only happened when the memory was set to more than what the host has.

what is the output of free -h ?

does it work if you set to a lower amount?

 

[dale]

In my case

~# free -h
total used free shared buff/cache available
Mem: 125Gi 43Gi 67Gi 121Mi 15Gi 81Gi
Swap: 19Gi 10Mi 19Gi

~# cat /sys/fs/cgroup/memory///lxc/120/memory.limit_in_bytes
8590983168
~# echo $((8589934592+1024*1024*512)) >/sys/fs/cgroup/memory///lxc/120/memory.limit_in_bytes
9126805504

~# echo $((8589934592+1024*1024*513)) >/sys/fs/cgroup/memory///lxc/120/memory.limit_in_bytes
bash: echo: write error: Invalid argument

512MB max memory increment

Best regards,
dale.

 

[dale]

After some googling i found: http://timjrobinson.com/docker-lxc-set-memory-limit-invalid-argument/

so in my case

echo $((1024*1024*1024*16)) > /sys/fs/cgroup/memory///lxc/120/memory.memsw.limit_in_bytes
echo $((1024*1024*1024*10)) > /sys/fs/cgroup/memory///lxc/120/memory.limit_in_bytes

resolved issue.