[jira] [Created] (MESOS-7237) Enabling cgroups_limit_swap can lead to "invalid argument" error.

["Jie Yu (JIRA)" <ji...@apache.org>]

Jie Yu created MESOS-7237:
-----------------------------

             Summary: Enabling cgroups_limit_swap can lead to "invalid argument" error.
                 Key: MESOS-7237
                 URL: https://issues.apache.org/jira/browse/MESOS-7237
             Project: Mesos
          Issue Type: Bug
    Affects Versions: 1.2.0, 1.1.0, 1.0.2
         Environment: CentOS 7.
            Reporter: Jie Yu


This is related to MESOS-2128. Looks like the redhat doc linked in that ticket is not accurate. `memory.limit_in_bytes` has to be less than or equal to `memory.memsw.limit_in_bytes`. Otherwise, the kernel is gonna throw EINVAL. Here is the validation with a box that has swap disabled:
{noformat}
[root@ip-10-10-0-120 test]# pwd
/sys/fs/cgroup/memory/test
[root@ip-10-10-0-120 test]# sleep 1000000 &
[1] 23121
[root@ip-10-10-0-120 test]# echo 23121 > tasks
[root@ip-10-10-0-120 test]# cat tasks
23121
[root@ip-10-10-0-120 test]# cat memory.limit_in_bytes
9223372036854771712
[root@ip-10-10-0-120 test]# cat memory.memsw.limit_in_bytes
9223372036854771712
[root@ip-10-10-0-120 test]# echo 3000000 > memory.limit_in_bytes
[root@ip-10-10-0-120 test]# echo 3000000 > memory.memsw.limit_in_bytes
[root@ip-10-10-0-120 test]# echo 100000000 > memory.limit_in_bytes
bash: echo: write error: Invalid argument
[root@ip-10-10-0-120 test]# cat /proc/swaps
Filename                                Type            Size    Used    Priority
{noformat}

{noformat}
[root@ip-10-10-0-120 test]# sleep 100000 &
[1] 31363
[root@ip-10-10-0-120 test]# echo 31363 > tasks
[root@ip-10-10-0-120 test]# echo 3000000 > memory.memsw.limit_in_bytes
bash: echo: write error: Invalid argument
[root@ip-10-10-0-120 test]# echo 3000000 > memory.limit_in_bytes
[root@ip-10-10-0-120 test]# echo 3000000 > memory.memsw.limit_in_bytes
[root@ip-10-10-0-120 test]# echo 100000000 > memory.memsw.limit_in_bytes
[root@ip-10-10-0-120 test]# echo 100000000 > memory.limit_in_bytes
[root@ip-10-10-0-120 test]# cat memory.limit_in_bytes
99999744
[root@ip-10-10-0-120 test]# cat memory.memsw.limit_in_bytes
99999744
{noformat}



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