[memcg,RFC,0/3] memcg: prohibit unconditional exceeding the limit of dying tasks

Message

Vasily Averin Oct. 20, 2021, 12:11 p.m. UTC

Dear Michal,
as you requested, I splited v4 patch version into 3 separate parts.
Let's discuss each of them.

Open questions/ToDo:

- Update patch descriptions (and add some comments) 

- in part 2 aka "memcg: remove charge forcinig for dying tasks":
  should we keep task_is_dying() in mem_cgroup_out_of_memory() ?

- in part 3 aka "memcg: handle memcg oom failures"
   what is the best way to notify pagefault_out_of_memory() about 
    mem_cgroup_out_of_memory failure ?
    
- what is the best way to handle memcg failure doe to kmem limit,
    it can trigger false global OOM

Vasily Averin (3):
  mm: do not firce global OOM from inside dying tasks
  memcg: remove charge forcinig for dying tasks
  memcg: handle memcg oom failures

 mm/memcontrol.c | 52 ++++++++++++++++++++++++++++---------------------
 mm/oom_kill.c   |  3 +++
 2 files changed, 33 insertions(+), 22 deletions(-)