Re: [patch 7/8] mm, memcg: allow processes handling oomnotifications to access reserves

[Michal Hocko]

On Thu 12-12-13 09:21:56, Tejun Heo wrote:
[...]
> There'd still be all the bells and whistles to configure and monitor
> system-level OOM and if there's justified need for improvements, we
> surely can and should do that;

You weren't on the CC of the original thread which has started here
https://lkml.org/lkml/2013/11/19/191. And the original request for
discussion was more about user defined _policies_ for the global
OOM rather than user space global OOM handler. I feel that there
are usacases where the current "kill a single task based on some
calculations" is far from optimal which leads to hacks which try to cope
with after oom condition somehow gracefully.

I do agree with you that pulling oom handling sounds too dangerous
even with all the code that it would need and I feel we should go a
different path than (ab)using memcg.oom_control interface for that.
I still think we need to have a way to tell the global OOM killer what
to do.

[...]
-- 
Michal Hocko
SUSE Labs
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/