Re: [v7 2/5] mm, oom: cgroup-aware OOM killer

[Michal Hocko]

On Tue 05-09-17 21:23:57, Roman Gushchin wrote:
> On Tue, Sep 05, 2017 at 04:57:00PM +0200, Michal Hocko wrote:
[...]
> > > @@ -810,6 +810,9 @@ static void __oom_kill_process(struct task_struct *victim)
> > >  	struct mm_struct *mm;
> > >  	bool can_oom_reap = true;
> > >  
> > > +	if (is_global_init(victim) || (victim->flags & PF_KTHREAD))
> > > +		return;
> > > +
> > 
> > This will leak a reference to the victim AFACS
> 
> Good catch!
> I didn't fix this after moving reference dropping into __oom_kill_process().
> Fixed.

Btw. didn't you want to check
victim->signal->oom_score_adj == OOM_SCORE_ADJ_MIN

here as well? Maybe I've missed something but you still can kill a task
which is oom disabled which I thought we agreed is the wrong thing to
do.
-- 
Michal Hocko
SUSE Labs