Re: [patch 10/11] mm, memcg: add memory.oom_control notification for system oom

Tejun Heo
2014-03-06T21:15:06Z

On Tue, Mar 04, 2014 at 07:59:41PM -0800, David Rientjes wrote:
> Now that process handling system oom conditions have access to a small
> amount of memory reserves, we need a way to notify those process on
> system oom conditions.
>
> When a userspace process waits on the root memcg's memory.oom_control, it
> will wake up anytime there is a system oom condition.
>
> This is a special case of oom notifiers since it doesn't subsequently
> notify all memcgs under the root memcg (all memcgs on the system). We
> don't want to trigger those oom handlers which are set aside specifically
> for true memcg oom notifications that disable their own oom killers to
> enforce their own oom policy, for example.
>
> Signed-off-by: David Rientjes <rientjes@google.com>

Until consensus on the whole approach can be reached,

Nacked-by: Tejun Heo <tj@kernel.org>

Thanks.

--
tejun