RFR: 8343191: Cgroup v1 subsystem fails to set subsystem path [v9]

[Sergey Chernyshev]

On Wed, 11 Dec 2024 15:24:12 GMT, Severin Gehwolf <sgehwolf at openjdk.org> wrote:

>> Would you recommand also to include the paths in that warning? Something like
>> ```cgroup controller path at '/sys/fs/cgroup' seems to have moved to '../../test', detected limits won't be accurate```
>> This way it will have all the necessary information to investigate customer cases.
>
> Seems fine yes.

Updated the log message. The log example in cg v1:

[0.001s][trace][os,container] OSContainer::init: Initializing Container Support
[0.001s][debug][os,container] Detected optional pids controller entry in /proc/cgroups
[0.001s][debug][os,container] Detected cgroups hybrid or legacy hierarchy, using cgroups v1 controllers
[0.001s][warning][os,container] Cgroup memory controller path at '/sys/fs/cgroup/memory' seems to have moved to '/../../test', detected limits won't be accurate
[0.001s][debug  ][os,container] OSContainer::init: is_containerized() = true because all controllers are mounted read-only (container case)
[0.001s][trace  ][os,container] Path to /cpu.cfs_quota_us is /sys/fs/cgroup/cpu,cpuacct/cpu.cfs_quota_us
[0.001s][trace  ][os,container] CPU Quota is: -1
[0.002s][trace  ][os,container] Path to /cpu.cfs_period_us is /sys/fs/cgroup/cpu,cpuacct/cpu.cfs_period_us
[0.002s][trace  ][os,container] CPU Period is: 100000
[0.002s][trace  ][os,container] OSContainer::active_processor_count: 48
[0.002s][trace  ][os,container] CgroupSubsystem::active_processor_count (cached): 48
[0.002s][trace  ][os,container] total physical memory: 133623721984
[0.002s][trace  ][os,container] Path to /memory.limit_in_bytes is /sys/fs/cgroup/memory/memory.limit_in_bytes
[0.002s][trace  ][os,container] Memory Limit is: 419430400
[0.004s][trace  ][os,container] CgroupSubsystem::active_processor_count (cached): 48
[0.027s][trace  ][os,container] Path to /cpu.cfs_quota_us is /sys/fs/cgroup/cpu,cpuacct/cpu.cfs_quota_us
[0.027s][trace  ][os,container] CPU Quota is: -1
[0.027s][trace  ][os,container] Path to /cpu.cfs_period_us is /sys/fs/cgroup/cpu,cpuacct/cpu.cfs_period_us
[0.027s][trace  ][os,container] CPU Period is: 100000
[0.027s][trace  ][os,container] OSContainer::active_processor_count: 48
openjdk version "24-internal" 2025-03-18
OpenJDK Runtime Environment (build 24-internal-adhoc.bellsoft.jdk)
OpenJDK 64-Bit Server VM (build 24-internal-adhoc.bellsoft.jdk, mixed mode, sharing)

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PR Review Comment: https://git.openjdk.org/jdk/pull/21808#discussion_r1881224417