Re: [RFC][PATCH v2 0/8] vmscan: AIM7 scalability improvement

KOSAKI Motohiro
2009-12-10T07:53:32Z

> 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?

this patches is made ontop mmotm1208.