Re: [RFC][PATCH 0/4] memcg: add support for hwpoison testing

[Balbir Singh]

* Wu Fengguang <fengguang.wu@xxxxxxxxx> [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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/