On Wed 30-04-14 16:25:38, Johannes Weiner wrote:
[...]
> @@ -6546,8 +6546,9 @@ one_by_one:
>                       cond_resched();
>               }
>               ret = mem_cgroup_try_charge(memcg, GFP_KERNEL, 1, false);
> +             if (ret == -EINTR)
> +                     __mem_cgroup_cancel_charge(root_mem_cgroup, 1);
>               if (ret)
> -                     /* mem_cgroup_clear_mc() will do uncharge later */

I would prefer to keep the comment and explain that we will loose return
code on the way and that is why cancel on root has to be done here.

>                       return ret;
>               mc.precharge++;
>       }
> -- 
> 1.9.2
> 

-- 
Michal Hocko
SUSE Labs
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