Messages in this thread | | | Date | Wed, 07 Dec 2005 18:47:55 +0800 | From | Wu Fengguang <> | Subject | [PATCH 00/16] Balancing the scan rate of major caches V3 |
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Changes since V2: - fix divide error in shrink_slab() - more debug/accounting code - fine grained priority/scan quantity - reluctant to reclaim lowest zone if it is out of sync with highest zone
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 is 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 mm-fine-grained-scan-priority.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-fold-bool-variables-into-flags-in-scan-control.patch
- minor fix mm-scan-accounting-fix.patch
- debug code mm-account-zone-aging-rounds.patch mm-page-reclaim-debug-traces.patch mm-kswapd-reclaim-debug-trace.patch
Thanks, Wu Fengguang
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