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src/linux/cgroups.hpp
<https://reviews.apache.org/r/10808/#comment42508>

    why not hashmap?



src/linux/cgroups.cpp
<https://reviews.apache.org/r/10808/#comment42516>

    why not just subsystems() instead of internal::subsystems()?



src/linux/cgroups.cpp
<https://reviews.apache.org/r/10808/#comment42515>

    if you use hashmap, you can just do .contains() here



src/tests/cgroups_tests.cpp
<https://reviews.apache.org/r/10808/#comment42517>

    i think counting the number of cgroups before and after could likely be 
error prone right? the number could satisfy your expectations while there is a 
remnant cgroup(s) from the test (e.g., a non mesos-cgroup went away while the 
test was running)
    
    i think you should actually match the cgroups themselves?
    
    also, the awkward naming of the variables suggests that there could be 
better abstractions/functions for what we want.


- Vinod Kone


On May 6, 2013, 10:36 p.m., Thomas Marshall wrote:
> 
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> This is an automatically generated e-mail. To reply, visit:
> https://reviews.apache.org/r/10808/
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> 
> (Updated May 6, 2013, 10:36 p.m.)
> 
> 
> Review request for mesos, Benjamin Hindman, Vinod Kone, and Ben Mahler.
> 
> 
> Description
> -------
> 
> Previously, our the CgroupsAnyHierarchy*Tests were not waiting long enough 
> for the cgroups created to be cleaned up before the test finished, resulting 
> in failures when the next test was unable to create cgroups for itself. This 
> patch attempts to fix that by having CgroupsAnyHierarchy::TearDown wait until 
> the number of cgroups each subsystem is attached to, documented in 
> /proc/cgroups, is the same as it was before the test ran.
> 
> 
> This addresses bug MESOS-449.
>     https://issues.apache.org/jira/browse/MESOS-449
> 
> 
> Diffs
> -----
> 
>   src/linux/cgroups.hpp 3e86828 
>   src/linux/cgroups.cpp cfdc3b2 
>   src/tests/cgroups_tests.cpp 3734315 
> 
> Diff: https://reviews.apache.org/r/10808/diff/
> 
> 
> Testing
> -------
> 
> On both Ubuntu and CentOS, on both clean installs and in the presence of 
> pre-existing cgroups on the system (such as those left behind by 
> BalloonFramework failing):
> 
> bin/mesos-tests.sh --gtest_break_on_failure --gtest_repeat=1000 
> --gtest_filter=*CgroupsAny*
> 
> 
> Thanks,
> 
> Thomas Marshall
> 
>

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