Messages in this thread | | | From | KOSAKI Motohiro <> | Subject | [RFC][PATCH v2 0/8] vmscan: AIM7 scalability improvement | Date | Thu, 10 Dec 2009 16:28:49 +0900 (JST) |
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Larry Woodman reported current VM has big performance regression when AIM7 benchmark. It use very much processes and fork/exit/page-fault frequently. (i.e. it makes serious lock contention of ptelock and anon_vma-lock.)
At 2.6.28, we removed calc_reclaim_mapped() and it made vmscan, then vmscan always call page_referenced() although VM pressure is low. It increased lock contention more, unfortunately.
Larry, can you please try this patch series on your big box?
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