[PATCH 00/12] Balancing the scan rate of major caches

Hi all,

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 involves 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.
  If the shrinkers are not NUMA aware, they will effectly sync scan rates
  with that of the most scanned node.


The patches can be grouped as follows:

- balancing stuffs
vm-kswapd-incmin.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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• Follow-Ups:
  • [PATCH 12/12] mm: fix minor scan count bugs
    • From: Wu Fengguang <[email protected]>
  • [PATCH 11/12] mm: add page reclaim debug traces
    • From: Wu Fengguang <[email protected]>
  • [PATCH 10/12] mm: merge sc.may_writepage and sc.may_swap into sc.flags
    • From: Wu Fengguang <[email protected]>
  • [PATCH 09/12] mm: accumulate sc.nr_scanned/sc.nr_reclaimed
    • From: Wu Fengguang <[email protected]>
  • [PATCH 08/12] mm: remove swap_cluster_max from scan_control
    • From: Wu Fengguang <[email protected]>
  • [PATCH 06/12] mm: balance active/inactive list scan rates
    • From: Wu Fengguang <[email protected]>
  • [PATCH 04/12] mm: balance zone aging in kswapd reclaim path
    • From: Wu Fengguang <[email protected]>
  • [PATCH 07/12] mm: remove unnecessary variable and loop
    • From: Wu Fengguang <[email protected]>
  • [PATCH 05/12] mm: balance slab aging
    • From: Wu Fengguang <[email protected]>
  • [PATCH 01/12] vm: kswapd incmin
    • From: Wu Fengguang <[email protected]>
  • [PATCH 02/12] mm: supporting variables and functions for balanced zone aging
    • From: Wu Fengguang <[email protected]>
  • [PATCH 03/12] mm: balance zone aging in direct reclaim path
    • From: Wu Fengguang <[email protected]>

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