Bug#982056: cgroup: cgroup2: unknown option "memory_recursiveprot"

[Salvatore Bonaccorso <carnil@debian.org>]

Hi,

On Sat, Feb 06, 2021 at 10:02:06AM +0800, xiao sheng wen wrote:
> Package: src:linux
> Version: 4.19.171-2
> Severity: normal
> 
> On my notebook boot use this version kernel,there is this error info display:
> 
> cgroup: cgroup2: unknown option "memory_recursiveprot"
> 
> This error info don't display in other version kernel.

>From the attached log you seem to run systemd from buster-backports
(247.2-5~bpo10+1). But from their NEWS in the changes done with 247:

        * The cgroup2 file system is now mounted with the
          "memory_recursiveprot" mount option, supported since kernel 5.7. This
          means that the MemoryLow= and MemoryMin= unit file settings now apply
          recursively to whole subtrees.

The support for thi was only added in 5.7-rc1 so if you need this you
will need as well the kernel from buster-backports.

Regards,
Salvatore