Messages in this thread | | | Date | Tue, 1 Sep 2009 22:01:52 +0530 | From | Balbir Singh <> | Subject | Re: [RFC][PATCH 0/4] memcg: add support for hwpoison testing |
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* Wu Fengguang <fengguang.wu@intel.com> [2009-09-01 16:55:49]:
> > My point is that memcg can show 'owner' of pages but the page may > > be shared with something important task _and_ if a task is migrated, > > its pages' memcg information is not updated now. Then, you can kill > > a task which is not in memcg. > > Ah thanks! I'm not aware of that tricky fact, and it does make a > very good reason not to use memcg, although I guess locked page won't > be migrated. >
I think what Kamezawa-San is pointing to is that the task can migrate, leaving behind the page in the memcg and poisioning those pages can kill a task outside the memcg.
-- Balbir
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