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config-linux: Remove redundant MUST for minimum cgroup controllers

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Any runtime which violated that constraint would necessarily violate
some more specific constraint on a 'resources' setting.

This also removes a non-spec-requirement "required" to avoid any
confusion with the spec-requirement REQUIRED [1].

[1]: https://github.com/opencontainers/runtime-spec/pull/729#issue-214550260

Signed-off-by: W. Trevor King <wking@tremily.us>
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W. Trevor King
2017-05-10 13:39:44 -07:00
parent cd92a0e385
commit fae94dbab0
1 changed files with 1 additions and 2 deletions
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config-linux.md
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@@ -186,8 +186,7 @@ You can configure a container's cgroups via the `resources` field of the Linux c
Do not specify `resources` unless limits have to be updated.
For example, to run a new process in an existing container without updating limits, `resources` need not be specified.
A runtime MUST at least use the minimum set of cgroup controllers required to fulfill the `resources` settings.
However, a runtime MAY attach the container process to additional cgroup controllers supported by the system.
Runtimes MAY attach the container process to additional cgroup controllers beyond those necessary to fulfill the `resources` settings.
###### Example