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    SubjectRe: [patch 06/11] mm: memcg: remove optimization of keeping the root_mem_cgroup LRU lists empty
    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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      Last update: 2011-09-29 11:23    [W:0.018 / U:6.444 seconds]
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