[pkg-lxc-devel] LXC cgroup problem in Bullseye

[Ervin Hegedüs]

Hi there,

I really hope this is the right forum for my question :).

I've been using LXC for a long time, since about Debian 8. A few days ago I
installed a Bullseye, and now I want to install the containers, as I did it
on other machines.

Everything seems to work as well, except the cgroup limits. I can't set the
CPU nor memory limitation. Here is how I try:

lxc.cgroup.cpuset.cpus = 0-3
lxc.cgroup.memory.soft_limit_in_bytes = 4294967296
lxc.cgroup.memory.limit_in_bytes = 4294967296

but when I step into the container, I see:

cat /proc/cpuinfo
...
processor : 7

so I see all CPU's that exist on the host. The memory limit is similar,
here is the output:
# free
               total        used        free      shared  buff/cache
available
Mem:        16341404       80492    16255104         132        5808
 16260912

This config works as well on many Debian 10 system: I can set the limit for
memory or CPU. (Just my 2 cents: in most cases I use lxc.cgroup.blkio for
all disks. This isn't set yet in this container, but I assume that also
does not work.)


What am I doing wrong? Is there any documentation for LXC 4 resource
limitation? (Especially for Debian 11...)


Many thanks,


a.
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