cgroups: set memory cgroups in Set #495
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Modify the memory cgroup code such that kmem is not managed by Set(), in order to allow updating of memory constraints for containers by Docker. This also removes the need to make memory a special case cgroup. Signed-off-by: Aleksa Sarai <asarai@suse.com>
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hqhq
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cgroups: set memory cgroups in Set
stefanberger
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Sep 8, 2017
…dent runtime.md: Fix sub-bullet indentation
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The only discussion related to this is in [1,2], where the relationship between oomScoreAdj and disableOOMKiller is raised. But since 429f936 (Adding cgroups path to the Spec, 2015-09-02, opencontainers#137) resources has been tied to cgroups, and oomScoreAdj is not about cgroups. For example, we currently have (in config-linux.md): You can configure a container's cgroups via the resources field of the Linux configuration. I suggested we move the property from linux.resources.oomScoreAdj to linux.oomScoreAdj so config authors and runtimes don't have to worry about what cgroupsPath means if the only entry in resources is oomScoreAdj. Michael responded with [4]: If anything it should probably go on the process So that's what this commit does. I've gone with the four-space indents here to keep Pandoc happy (see 7795661 (runtime.md: Fix sub-bullet indentation, 2016-06-08, opencontainers#495), but have left the existing entries in this list unchanged to reduce churn. [1]: opencontainers/runtime-spec#236 [2]: opencontainers/runtime-spec#292 [3]: opencontainers/runtime-spec#137 [4]: opencontainers/runtime-spec#782 (comment) Signed-off-by: W. Trevor King <wking@tremily.us>
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Roll back the genericization from 718f9f3 (minor narrative cleanup regarding config compatibility, 2017-01-30, opencontainers#673). Lifting the restriction there seems to have been motivated by "Solaris supports capabilities", but that was before the split into a capabilities object which happened in eb114f0 (Add ambient and bounding capability support, 2017-02-02, opencontainers#675). It's not clear if Solaris supports ambient caps, or what Solaris API noNewPrivileges were punting to [1]. And John Howard has recently confirmed that Windows does not support capabilities and is unlikely to do so in the future [2]. He also confirmed that Windows does not support rlimits [3]. John's statement didn't directly address noNewPrivileges, but we can always restore any of these properties to the Solaris/Windows platforms if/when we get docs about which API we're punting to on those platforms. Also add some backticks, remove the hyphens in "OPTIONAL) - the", standardize lines I touch to use "the process" [4], and use four-space indents here to keep Pandoc happy (see 7795661 (runtime.md: Fix sub-bullet indentation, 2016-06-08, opencontainers#495). [1]: opencontainers/runtime-spec#673 (comment) [2]: opencontainers/runtime-spec#810 (comment) [3]: opencontainers/runtime-spec#835 (comment) [4]: opencontainers/runtime-spec#809 (comment) Signed-off-by: W. Trevor King <wking@tremily.us>
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Modify the memory cgroup code such that kmem is not managed by Set(), in
order to allow updating of memory constraints for containers by Docker.
This also removes the need to make memory a special case cgroup.
Signed-off-by: Aleksa Sarai asarai@suse.com
This is split from #470:
/cc @crosbymichael @mrunalp @dqminh @LK4D4