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From Andrei Budnik <abud...@mesosphere.com>
Subject Re: Review Request 66404: Removed check for nested cgroup support in `cgroups::prepare()`.
Date Wed, 04 Apr 2018 14:44:40 GMT


> On April 3, 2018, 7:13 p.m., Gilbert Song wrote:
> > LGTM, before landing this patch, could we verify the nested cgroup is alwasy supportted
after kernel 2.6.23?

Nested freezer cgroup is supported since kernel **2.6.28**
```
freezer (since Linux 2.6.28; CONFIG_CGROUP_FREEZER)
              The freezer cgroup can suspend and restore (resume) all pro?
              cesses in a cgroup.  Freezing a cgroup /A also causes its
              children, for example, processes in /A/B, to be frozen.
```
Note, that we are trying to create a directory using `/sys/fs/cgroup/freezer/mesos/test` path.


- Andrei


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https://reviews.apache.org/r/66404/#review200392
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On April 3, 2018, 4:19 p.m., Andrei Budnik wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/66404/
> -----------------------------------------------------------
> 
> (Updated April 3, 2018, 4:19 p.m.)
> 
> 
> Review request for mesos, Alexander Rukletsov, Gilbert Song, and Jie Yu.
> 
> 
> Bugs: MESOS-8489
>     https://issues.apache.org/jira/browse/MESOS-8489
> 
> 
> Repository: mesos
> 
> 
> Description
> -------
> 
> Previously, we were checking for nested cgroup support while trying to
> create a linux launcher. This was necessary to make sure that the
> kernel supports creating nested cgroups. As we don't support old
> kernel versions which don't support nested cgroups, this check can be
> safely removed.
> 
> 
> Diffs
> -----
> 
>   src/linux/cgroups.cpp 682b288da8d56a623ef32cf6f0beecd9fc327622 
> 
> 
> Diff: https://reviews.apache.org/r/66404/diff/1/
> 
> 
> Testing
> -------
> 
> internal CI
> 
> 
> Thanks,
> 
> Andrei Budnik
> 
>


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