On Thu 04-12-14 17:56:01, Michal Hocko wrote:
> diff --git a/mm/oom_kill.c b/mm/oom_kill.c
> index 1d55ab12792f..032be9d2a239 100644
> --- a/mm/oom_kill.c
> +++ b/mm/oom_kill.c
> @@ -408,7 +408,7 @@ static void dump_header(struct task_struct *p, gfp_t 
> gfp_mask, int order,
>   * Number of OOM victims in flight
>   */
>  static atomic_t oom_victims = ATOMIC_INIT(0);
> -static DECLARE_COMPLETION(oom_victims_wait);
> +static DECLARE_WAIT_QUEUE_HEAD(oom_victims_wait);
>  
>  bool oom_killer_disabled __read_mostly;
>  static DECLARE_RWSEM(oom_sem);
> @@ -435,7 +435,7 @@ void unmark_tsk_oom_victim(void)
>        * is nobody who cares.
>        */
>       if (!atomic_dec_return(&oom_victims) && oom_killer_disabled)
> -             complete_all(&oom_victims_wait);
> +             wake_up_all(&oom_victims_wait);
>       up_read(&oom_sem);
>  }
>  
> @@ -464,16 +464,11 @@ bool oom_killer_disable(void)
>               return false;
>       }
>  
> -     /* unmark_tsk_oom_victim is calling complete_all */
> -     if (!oom_killer_disable)
> -             reinit_completion(&oom_victims_wait);
> -
>       oom_killer_disabled = true;
> -     count = atomic_read(&oom_victims);
>       up_write(&oom_sem);
>  
>       if (count)

whithout this count test obviously

> -             wait_for_completion(&oom_victims_wait);
> +             wait_event(oom_victims_wait, atomic_read(&oom_victims));
>  
>       return true;
>  }
-- 
Michal Hocko
SUSE Labs
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