Messages in this thread | | | Date | Wed, 30 May 2012 17:37:57 +0400 | From | Glauber Costa <> | Subject | Re: [PATCH v3 16/28] memcg: kmem controller charge/uncharge infrastructure |
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On 05/30/2012 05:37 PM, Frederic Weisbecker wrote: > Right. __mem_cgroup_get_kmem_cache() fetches the memcg of the owner > and calls memcg_create_cache_enqueue() which does css_tryget(&memcg->css). > After this tryget I think you're fine. And in-between you're safe against > css_set removal due to rcu_read_lock(). > > I'm less clear with __mem_cgroup_new_kmem_page() though...
That one does not get memcg->css but it does call mem_cgroup_get(), that does prevent against the memcg structure being freed, which I believe to be good enough.
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