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specs-go: mark LinuxMemory.Kernel as deprecated #1233

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merged 1 commit into from
Oct 5, 2023
Merged

specs-go: mark LinuxMemory.Kernel as deprecated #1233

merged 1 commit into from
Oct 5, 2023

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thaJeztah
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Support for kernel-memory limits was deprecated in the kernel, and documented as "NOT RECOMMENDED" (or "SHOULD NOT" use) in v1.1.0-rc.1 through commit f02cd4a.

This patch marks the field as deprecated in the go implementation of the spec, so that linters and editors produces a warning and consumers get notified of its status.

@thaJeztah
specs-go: mark LinuxMemory.Kernel as deprecated
cabeea7 
Support for kernel-memory limits was deprecated in the kernel, and documented
as "NOT RECOMMENDED" (or "SHOULD NOT" use) in  v1.1.0-rc.1 through commit
f02cd4a.

This patch marks the field as deprecated in the go implementation of the
spec, so that linters and editors produces a warning and consumers get
notified of its status.

Signed-off-by: Sebastiaan van Stijn <[email protected]>
@thaJeztah
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FWIW I did not (yet) update the KernelTCP field, as there was some discussion about KernelTCP on the linked PR; https://github.com/opencontainers/runtime-spec/pull/1093/files#r589703045, as well as opencontainers/runc#3174 (comment)

https://github.com/torvalds/linux/blob/master/Documentation/admin-guide/cgroup-v1/memory.rst
It looks like this definitely turned to "deprecated"...

The memory.kmem.tcp.limit_in_bytes knob is not listed as deprecated in the document you mention, this is the reason why we have this issue opened. I just checked the recent kernel, and unlike memory.kmem.limit_in_bytes (which was deprecated by the kernel commit 58056f77502f3567b760c9a8fc8d2e9081515b2d), the kmem.tcp is still accepted by the kernel.

Given the fact that cgroup v1 is going to be deprecated sooner or later, and we receive no bug reports about inability to set kmem.tcp limit, I guess we can leave this as is for now.

@AkihiroSuda AkihiroSuda added this to the v1.1.1 milestone Sep 29, 2023
giuseppe
giuseppe approved these changes Sep 29, 2023
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LGTM

@thaJeztah
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If people have suggestions for the KernelTCP field, and proper wording for that, also let me know (happy to open a PR for that as well)

@hqhq hqhq merged commit 6331715 into opencontainers:main Oct 5, 2023
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@thaJeztah thaJeztah deleted the go_kmem_deprecated branch October 5, 2023 07:18
@utam0k utam0k mentioned this pull request Jan 5, 2024
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@kolyshkin kolyshkin mentioned this pull request Feb 22, 2024
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