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

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Hi,

On Mon, Jul 21, 2025 at 09:42:23AM +0200, Harald Dunkel wrote:
> > Applied to cgroup/for-6.17.
> 
> I would recommend to follow upstream for kernels beyond
> Trixie in this aspect. Debian needs a workaround for kernel
> 6.12 in Trixie, because there are no JDKs fully compatible
> with cgroupv2 yet, including the brand-new
> 
> 	OpenJDK 11.0.28
>         OpenJDK 17.0.16
>         OpenJDK 21.0.8
> 
> released a few days ago. I expect the JDKs will be fixed for
> Forky.

This would be my "personal" (in terms of keeping deltas in the
packaging) preference:
- make sure the patches get backported down to 6.12.y
- drop our local revert
- make uses affected made aware of the kernel parameter to use (maybe
  via a NEWS entry?)

I had a short discussion on IRC with Ben about that, and as the
upstream changes are not yet down to 6.12.y the situation is rather
clear that we have the revert. If the changes goes down to 6.12.y
though I would love to rediscuss if we could consider the above
instread.

I though realize it is too early to at all consider, given it's not
yet applied upsream.

Regards,
Salvatore

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Thread

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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