On Thu 14-05-15 14:01:42, Cyril Hrubis wrote:
> Hi!
> > > The previous testcases does exactly this but moves the process to the
> > > parent with:
> > >
> > > echo $pid > ../tasks
> > >
> > > Before it tries the force_empty and expects it to succeed.
> > >
> > > Was this some old implementation limitation that has been lifted
> > > meanwhile?
> >
> > OK, now I remember... f61c42a7d911 ("memcg: remove tasks/children test
> > from mem_cgroup_force_empty()") which goes back to 3.16. So the test
> > case is invalid.
>
> Then please send a patch to remove the test.
I think we can still fix both tescases and expect not to fail with
regular mmap but fail it with unreclaimable memory (e.g. disallow
swapout or use mlock).
--
Michal Hocko
SUSE Labs
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