Re: [patch 1/2] mm, memcg: avoid oom notification when current needsaccess to memory reserves

[Michal Hocko]

On Thu 12-12-13 11:31:59, Michal Hocko wrote:
[...]
> The semantic would be as simple as "notification is sent only when
> an action is due". It will be still racy as nothing prevents a task
> which is not under OOM to exit and release some memory but there is no
> sensible way to address that. On the other hand such a semantic would be
> sensible for oom_control listeners because they will know that an action
> has to be or will be taken (the line was drawn).
> 
> Can we agree on this, Johannes? Or you see the line drawn when
> mem_cgroup_oom_synchronize has been reached already no matter whether
> the action is to be done or not?

Something like the following: