Please backport commit 3812c8c8f39 to stable

[Cong Wang]

Hi, Johannes and Greg


Please consider to backport the following commit to stable kernels < 3.12.

commit 3812c8c8f3953921ef18544110dafc3505c1ac62
Author: Johannes Weiner <hannes@xxxxxxxxxxx>
Date:   Thu Sep 12 15:13:44 2013 -0700

    mm: memcg: do not trap chargers with full callstack on OOM

It should solve some soft lockup I observed on different machines
recently. For me myself, I only care about 3.10. :-p

commit 4942642080ea82d99ab5b65 (mm: memcg: handle non-error OOM
situations more gracefully) seems needed as a followup. Johannes
should know much better than I do.

Let me know if you need any more information or help from me.

Thanks much!
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