On Thu, Mar 17, 2011 at 01:43:50PM +0100, Johannes Weiner wrote:
[..]
> So structures roughly like this:
>
> struct mem_cgroup {
> ...
> /* key is struct backing_dev_info * */
> struct rb_root memcg_bdis;
> };
>
> struct memcg_bdi {
> /* key is struct address_space * */
> struct rb_root memcg_mappings;
> struct rb_node node;
> };
>
> struct memcg_mapping {
> struct address_space *mapping;
> struct mem_cgroup *memcg;
> struct rb_node node;
> atomic_t count;
> };
>
> struct page_cgroup {
> ...
> struct memcg_mapping *memcg_mapping;
> };
Johannes, didn't you want page->mapping to point to memcg_mapping instead
of increasing the size of page_cgroup?
Thanks
Vivek
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