On Fri, 22 Nov 2013, Johannes Weiner wrote: > diff --git a/mm/memcontrol.c b/mm/memcontrol.c > index 13b9d0f..cc4f9cb 100644 > --- a/mm/memcontrol.c > +++ b/mm/memcontrol.c > @@ -2677,6 +2677,9 @@ static int __mem_cgroup_try_charge(struct mm_struct *mm, > if (unlikely(task_in_memcg_oom(current))) > goto bypass; > > + if (gfp_mask & __GFP_NOFAIL) > + oom = false; > + > /* > * We always charge the cgroup the mm_struct belongs to. > * The mm_struct's mem_cgroup changes on task migration if the Sorry, I don't understand this. What happens in the following scenario: - memory.usage_in_bytes == memory.limit_in_bytes, - memcg reclaim fails to reclaim memory, and - all processes (perhaps only one) attached to the memcg are doing one of the over dozen __GFP_NOFAIL allocations in the kernel? How do we make forward progress if you cannot oom kill something? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>