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    Subject[PATCH 00/13] Balancing the scan rate of major caches V2
    Changes since V1:
    - better broken up of patches
    - replace pages_more_aged with age_ge/age_gt
    - expanded shrink_slab interface
    - rewrite kswapd rebalance logic to be simple and robust


    This patch balances the aging rates of active_list/inactive_list/slab.

    It started out as an effort to enable the adaptive read-ahead to handle large
    number of concurrent readers. Then I found it envolves much more stuffs, and
    deserves a standalone patchset to address the balancing problem as a whole.


    The whole picture of balancing:

    - In each node, inactive_list scan rates are synced with each other
    It is done in the direct/kswapd reclaim path.

    - In each zone, active_list scan rate always follows that of inactive_list

    - Slab cache scan rates always follow that of the current node.
    Since shrink_slab() can be called from different CPUs, that effectly sync
    slab cache scan rates with that of the most scanned node.


    The patches can be grouped as follows:

    - balancing stuffs
    mm-revert-vmscan-balancing-fix.patch
    mm-simplify-kswapd-reclaim-code.patch
    mm-balance-zone-aging-supporting-facilities.patch
    mm-balance-zone-aging-in-direct-reclaim.patch
    mm-balance-zone-aging-in-kswapd-reclaim.patch
    mm-balance-slab-aging.patch
    mm-balance-active-inactive-list-aging.patch


    - pure code cleanups
    mm-remove-unnecessary-variable-and-loop.patch
    mm-remove-swap-cluster-max-from-scan-control.patch
    mm-accumulate-nr-scanned-reclaimed-in-scan-control.patch
    mm-turn-bool-variables-into-flags-in-scan-control.patch

    - debug code
    mm-page-reclaim-debug-traces.patch

    - a minor fix
    mm-scan-accounting-fix.patch

    Thanks,
    Wu Fengguang

    --
    Dept. Automation University of Science and Technology of China
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