slowio-mem-control: add handsomejack

[david]

[3749687.287747] tokio-runtime-w invoked oom-killer: gfp_mask=0xcc0(GFP_KERNEL), order=0, oom_score_adj=0
[3749687.299115] CPU: 11 PID: 5905 Comm: tokio-runtime-w Kdump: loaded Not tainted 5.15.77.mx64.440 #1
[3749687.310105] Hardware name: Dell Inc. PowerEdge T630/0NT78X, BIOS 2.5.4 08/17/2017
[3749687.319536] Call Trace:
[3749687.323332]  <TASK>
[3749687.326720]  dump_stack_lvl+0x34/0x48
[3749687.331858]  dump_header+0x4a/0x1f1
[3749687.336787]  oom_kill_process.cold+0xb/0x10
[3749687.342483]  out_of_memory+0x250/0x500
[3749687.347678]  mem_cgroup_out_of_memory+0x110/0x160
[3749687.353932]  try_charge_memcg+0x70e/0x7d0
[3749687.359399]  ? __alloc_pages+0x1a8/0x310
[3749687.364765]  charge_memcg+0x40/0x90
[3749687.369651]  __mem_cgroup_charge+0x29/0x80
[3749687.375225]  __handle_mm_fault+0xb7f/0x1760
[3749687.380904]  handle_mm_fault+0xca/0x290
[3749687.386201]  do_user_addr_fault+0x1cb/0x670
[3749687.391898]  exc_page_fault+0x65/0x120
[3749687.397117]  asm_exc_page_fault+0x22/0x30
[3749687.402636] RIP: 0033:0x7f239c5d20d7
[3749687.407677] Code: 10 00 00 c5 fe 6f b6 40 10 00 00 c5 fe 6f be 60 10 00 00 48 83 ee 80 c5 fd e7 07 c5 fd e7 4f 20 c5 fd e7 57 40 c5 fd e7 5f 60 <c5> fd e7 a7 00 10 00 00 c5 fd e7 af 20 10 00 00 c5 fd e7 b7 40 10
[3749687.430707] RSP: 002b:00007f2399c4f168 EFLAGS: 00010207
[3749687.437715] RAX: 00007f22c97dfe24 RBX: 0000000000400000 RCX: 0000000000000020
[3749687.446883] RDX: 0000000000001fe4 RSI: 00007f237d58245c RDI: 00007f22c9bc5e40
[3749687.456056] RBP: 00007f2399c4f238 R08: ffffffffffffffe4 R09: 0000000000000000
[3749687.465244] R10: 000000000000000c R11: 0000000001e00000 R12: 00007f2399c4f438
[3749687.474445] R13: 000055a63ab6d850 R14: 000055a63ab6d8c8 R15: 00007f237d19c3c0
[3749687.483653]  </TASK>
[3749687.487351] memory: usage 2097152kB, limit 2097152kB, failcnt 3781081315
[3749687.496121] swap: usage 0kB, limit 9007199254740988kB, failcnt 0
[3749687.504129] Memory cgroup stats for /slowio.slice:
[3749687.504171] anon 2068746240
                 file 176128
                 kernel_stack 278528
                 pagetables 4415488
                 percpu 42528
                 sock 0
                 shmem 0
                 file_mapped 0
                 file_dirty 0
                 file_writeback 0
                 swapcached 0
                 anon_thp 0
                 file_thp 0
                 shmem_thp 0
                 inactive_anon 2068713472
                 active_anon 8192
                 inactive_file 0
                 active_file 0
                 unevictable 0
                 slab_reclaimable 73544784
                 slab_unreclaimable 205480
                 slab 73750264
                 workingset_refault_anon 0
                 workingset_refault_file 82335381
                 workingset_activate_anon 0
                 workingset_activate_file 4053988
                 workingset_restore_anon 0
                 workingset_restore_file 419105
                 workingset_nodereclaim 109486087
                 pgfault 381994321
                 pgmajfault 24613
                 pgrefill 4528145
                 pgscan 6059401245
                 pgsteal 6029019801
                 pgactivate 341435
                 pgdeactivate 4387281
                 pglazyfree 0
                 pglazyfreed 0
                 thp_fault_alloc 23936
                 thp_collapse_alloc 5926
[3749687.640286] Tasks state (memory values in pages):
[3749687.646429] [  pid  ]   uid  tgid total_vm      rss pgtables_bytes swapents oom_score_adj name
[3749687.656971] [   5614]     0  5614    11291     6513   106496        0             0 mxproxmox
[3749687.667436] [   5626]     0  5626   755730   501419  4329472        0             0 proxmox-backup-
[3749687.678487] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),cpuset=/,mems_allowed=0-1,oom_memcg=/slowio.slice,task_memcg=/slowio.slice/proxmox-backup.service,task=proxmox-backup-,pid=5626,uid=0
[3749687.700034] Memory cgroup out of memory: Killed process 5626 (proxmox-backup-) total-vm:3022920kB, anon-rss:2001836kB, file-rss:3840kB, shmem-rss:0kB, UID:0 pgtables:4228kB oom_score_adj:0