RFR: JDK-8287011: Improve container information [v3]

[Severin Gehwolf]

On Tue, 7 Jun 2022 13:11:49 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> src/hotspot/os/linux/os_linux.cpp line 2271:
>> 
>>> 2269:   // the kmem (kernel memory) values are only available in cgroupv1
>>> 2270:   if (p_ct != NULL && strcmp(p_ct, "cgroupv1") == 0) {
>>> 2271:     print_container_helper(st, OSContainer::kernel_memory_usage_in_bytes(), "kernel_memory_usage_in_bytes");
>> 
>> We wouldn't need the extra version checking gymnastics if we'd call an `OSContainer::print_version_specific_info(st);` here instead.
>
> sounds like a good idea, but with the kmem stuff deprecated (Kernel commit adding the deprecation:
> https://github.com/torvalds/linux/commit/0158115f702b )  we should maybe wait first for a reply from Thomas why he is still interested in it.

OK.

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PR: https://git.openjdk.java.net/jdk/pull/8991