Messages in this thread | | | Date | Thu, 29 Sep 2011 11:20:33 +0200 | From | Johannes Weiner <> | Subject | Re: [patch 06/11] mm: memcg: remove optimization of keeping the root_mem_cgroup LRU lists empty |
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On Tue, Sep 20, 2011 at 05:02:29PM +0200, Michal Hocko wrote: > On Mon 12-09-11 12:57:23, Johannes Weiner wrote: > > root_mem_cgroup, lacking a configurable limit, was never subject to > > limit reclaim, so the pages charged to it could be kept off its LRU > > lists. They would be found on the global per-zone LRU lists upon > > physical memory pressure and it made sense to avoid uselessly linking > > them to both lists. > > > > The global per-zone LRU lists are about to go away on memcg-enabled > > kernels, with all pages being exclusively linked to their respective > > per-memcg LRU lists. As a result, pages of the root_mem_cgroup must > > also be linked to its LRU lists again. > > Nevertheless we still do not charge them so this should be mentioned > here?
Added for the next revision:
"This is purely about the LRU list, root_mem_cgroup is still not charged."
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