Out of memory (OOM) killer in memory cgroup

Issue

• System kills process if memory cgroup on system gets out of memory and reaches cgroup memory limit

Nov  1 16:11:42 lab kernel: s1-agent invoked oom-killer: gfp_mask=0xd0, order=0, oom_score_adj=0
Nov  1 16:11:42 lab kernel: s1-agent cpuset=/ mems_allowed=0-1
Nov  1 16:11:42 lab kernel: CPU: 45 PID: 13331 Comm: s1-agent Tainted: G        W      ------------   3.10.0-957.21.3.el7.x86_64 #1
Nov  1 16:11:42 lab kernel: Hardware name: HP ProLiant XL450 Gen9 Server/ProLiant XL450 Gen9 Server, BIOS U21 01/22/2018
Nov  1 16:11:42 lab kernel: Call Trace:
Nov  1 16:11:42 lab kernel: [<ffffffffa4763107>] dump_stack+0x19/0x1b
Nov  1 16:11:42 lab kernel: [<ffffffffa475db2a>] dump_header+0x90/0x229
Nov  1 16:11:42 lab kernel: [<ffffffffa41ba386>] ? find_lock_task_mm+0x56/0xc0
Nov  1 16:11:42 lab kernel: [<ffffffffa42317a8>] ? try_get_mem_cgroup_from_mm+0x28/0x60
Nov  1 16:11:42 lab kernel: [<ffffffffa41ba834>] oom_kill_process+0x254/0x3d0
Nov  1 16:11:42 lab kernel: [<ffffffffa4235586>] mem_cgroup_oom_synchronize+0x546/0x570
Nov  1 16:11:42 lab kernel: [<ffffffffa4234a00>] ? mem_cgroup_charge_common+0xc0/0xc0
Nov  1 16:11:42 lab kernel: [<ffffffffa41bb0c4>] pagefault_out_of_memory+0x14/0x90
Nov  1 16:11:42 lab kernel: [<ffffffffa475c032>] mm_fault_error+0x6a/0x157
Nov  1 16:11:42 lab kernel: [<ffffffffa47707c8>] __do_page_fault+0x3c8/0x4f0
Nov  1 16:11:42 lab kernel: [<ffffffffa4770925>] do_page_fault+0x35/0x90
Nov  1 16:11:42 lab kernel: [<ffffffffa476c768>] page_fault+0x28/0x30
Nov  1 16:11:42 lab kernel: Task in /agent killed as a result of limit of /agent
Nov  1 16:11:42 lab kernel: memory: usage 1048576kB, limit 1048576kB, failcnt 1559756
Nov  1 16:11:42 lab kernel: memory+swap: usage 1048752kB, limit 9007199254740988kB, failcnt 0
Nov  1 16:11:42 lab kernel: kmem: usage 0kB, limit 9007199254740988kB, failcnt 0
Nov  1 16:11:42 lab kernel: Memory cgroup stats for /agent: cache:136KB rss:1048440KB rss_huge:0KB mapped_file:0KB swap:176KB inactive_anon:528216KB active_anon:520188KB inactive_file:44KB active_file:24KB unevictable:0KB
Nov  1 16:11:42 lab kernel: [ pid ]   uid  tgid total_vm      rss nr_ptes swapents oom_score_adj name
Nov  1 16:11:42 lab kernel: [13293]   992 13293  3411343   264627     985       61             0 s1-agent
Nov  1 16:11:42 lab kernel: Memory cgroup out of memory: Kill process 22811 (s1-agent) score 112 or sacrifice child
Nov  1 16:11:42 lab kernel: Killed process 13293 (s1-agent) total-vm:13645372kB, anon-rss:1052332kB, file-rss:6176kB, shmem-rss:0kB