Re: process hangs on do_exit when oom happens

From: Qiang Gao
Date: Tue Oct 23 2012 - 05:08:33 EST

this is just an example to show how to reproduce. actually,the first time I saw
this situation was on a machine with 288G RAM with many tasks running and
we limit 30G for each. but finanlly, no one exceeds this limit the the system

On Tue, Oct 23, 2012 at 4:35 PM, Michal Hocko <mhocko@xxxxxxx> wrote:
> On Tue 23-10-12 11:35:52, Qiang Gao wrote:
>> I'm sure this is a global-oom,not cgroup-oom. [the dmesg output in the end]
> Yes this is the global oom killer because:
>> cglimit -M 700M ./tt
>> then after global-oom,the process hangs..
>> 179184 pages RAM
> So you have ~700M of RAM so the memcg limit is basically pointless as it
> cannot be reached...
> --
> Michal Hocko
> SUSE Labs
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