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Bug#1108294: [PATCH 4/4] cgroup: Do not report unavailable v1 controllers in /proc/cgroups

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I booted the new kernel this morning. Using cgroupv2 I got

% docker run -it --rm -m 4g --cpus=3 debian:trixie 
root@b46ebbb70b04:/# apt update
Get:1 http://deb.debian.org/debian trixie InRelease [168 kB]
Get:2 http://deb.debian.org/debian trixie-updates InRelease [45.1 kB]
Get:3 http://deb.debian.org/debian-security trixie-security InRelease [43.4 kB]
Get:4 http://deb.debian.org/debian trixie/main amd64 Packages [9672 kB]
Get:5 http://deb.debian.org/debian-security trixie-security/main amd64 Packages [5304 B]
Fetched 9934 kB in 1s (9313 kB/s)                    
13 packages can be upgraded. Run 'apt list --upgradable' to see them.
root@b46ebbb70b04:/# apt -y install default-jdk
:
:
root@b46ebbb70b04:/# java -Xlog:os+container=trace --version
[0.001s][trace][os,container] OSContainer::init: Initializing Container Support
[0.001s][debug][os,container] Detected optional cpuset controller entry in /proc/cgroups
[0.001s][debug][os,container] Detected optional pids controller entry in /proc/cgroups
[0.002s][debug][os,container] Detected cgroups v2 unified hierarchy
[0.002s][trace][os,container] Path to /cpu.max is /sys/fs/cgroup/cpu.max
[0.002s][trace][os,container] Raw value for CPU quota is: 300000
[0.002s][trace][os,container] CPU Quota is: 300000
[0.002s][trace][os,container] Path to /cpu.max is /sys/fs/cgroup/cpu.max
[0.002s][trace][os,container] CPU Period is: 100000
[0.002s][trace][os,container] CPU Quota count based on quota/period: 3
[0.002s][trace][os,container] OSContainer::active_processor_count: 3
[0.002s][trace][os,container] CgroupSubsystem::active_processor_count (cached): 3
[0.002s][trace][os,container] total physical memory: 67099267072
[0.002s][trace][os,container] Path to /memory.max is /sys/fs/cgroup/memory.max
[0.002s][trace][os,container] Raw value for memory limit is: 4294967296
[0.002s][trace][os,container] Memory Limit is: 4294967296
[0.004s][trace][os,container] CgroupSubsystem::active_processor_count (cached): 3
[0.027s][trace][os,container] Path to /cpu.max is /sys/fs/cgroup/cpu.max
[0.027s][trace][os,container] Raw value for CPU quota is: 300000
[0.027s][trace][os,container] CPU Quota is: 300000
[0.027s][trace][os,container] Path to /cpu.max is /sys/fs/cgroup/cpu.max
[0.027s][trace][os,container] CPU Period is: 100000
[0.027s][trace][os,container] CPU Quota count based on quota/period: 3
[0.027s][trace][os,container] OSContainer::active_processor_count: 3
openjdk 21.0.7 2025-04-15
OpenJDK Runtime Environment (build 21.0.7+6-Debian-1)
OpenJDK 64-Bit Server VM (build 21.0.7+6-Debian-1, mixed mode, sharing)


This looks as expected. CPU and memory limits are correct. Now I have
to wait for a backport for Bookworm to roll out the new kernel to our
developers and to our Kubernetes nodes.


Thank you very much. I highly appreciate your contribution to
Debian.


Harri

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Bug#1108294: kernel 6.12 breaks cgroup awareness of openjdk 21 Harald Dunkel <harri@afaics.de> - 2025-06-25 09:10 +0200
  Bug#1108294: kernel 6.12 breaks cgroup awareness of openjdk 21 Ben Hutchings <ben@decadent.org.uk> - 2025-06-26 18:30 +0200
    Bug#1108294: kernel 6.12 breaks cgroup awareness of openjdk 21 Ben Hutchings <ben@decadent.org.uk> - 2025-06-26 19:20 +0200
      Bug#1108294: kernel 6.12 breaks cgroup awareness of openjdk 21 Ben Hutchings <ben@decadent.org.uk> - 2025-07-09 00:50 +0200
        Bug#1108294: kernel 6.12 breaks cgroup awareness of openjdk 21 Ben Hutchings <ben@decadent.org.uk> - 2025-07-09 14:00 +0200
    Bug#1108294: kernel 6.12 breaks cgroup awareness of openjdk 21 Harald Dunkel <harri@afaics.de> - 2025-06-26 20:50 +0200
      Bug#1108294: kernel 6.12 breaks cgroup awareness of openjdk 21 Ben Hutchings <ben@decadent.org.uk> - 2025-06-29 14:30 +0200
  Bug#1108294: kernel 6.12 breaks cgroup awareness of openjdk 21 Ben Hutchings <ben@decadent.org.uk> - 2025-06-26 18:50 +0200
  Bug#1108294: kernel 6.12 breaks cgroup awareness of openjdk 21 Bastian Blank <waldi@debian.org> - 2025-06-26 20:30 +0200
  Processed: Re: kernel 6.12 breaks cgroup awareness of openjdk 21 "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-07-09 00:50 +0200
  Bug#1108294: marked as done (kernel 6.12 breaks cgroup awareness  of openjdk 21) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2025-07-11 09:10 +0200
  Bug#1108294: [PATCH 4/4] cgroup: Do not report unavailable v1 controllers in /proc/cgroups Harald Dunkel <harri@afaics.de> - 2025-07-14 08:30 +0200
  Bug#1108294: [PATCH 4/4] cgroup: Do not report unavailable v1 controllers in /proc/cgroups Harald Dunkel <harald.dunkel@aixigo.com> - 2025-07-21 10:00 +0200
    Bug#1108294: [PATCH 4/4] cgroup: Do not report unavailable v1 controllers in /proc/cgroups Salvatore Bonaccorso <carnil@debian.org> - 2025-07-27 17:00 +0200
  Bug#1108294: 洗澡最危险 寒冬“10大易猝死行为”曝光 Alan Zhou <avianrobles359@gmail.com> - 2025-09-19 03:20 +0200

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