Re: [PATCH 2.6.16.29 1/1] MM: enhance Linux swap subsystem

["yunfeng zhang" <zyf.zeroos@gmail.com>]

2007/1/11, yunfeng zhang <zyf.zeroos@gmail.com>:
2007/1/11, Rik van Riel <riel@redhat.com>:
>
> Have you actually measured this?
>
> If your measurements saw any performance gains, with what kind
> of workload did they happen, how big were they and how do you
> explain those performance gains?
>
> How do you balance scanning the private memory with taking
> pages off the per-zone page lists?
>
> How do you deal with systems where some zones are really
> large and other zones are really small, eg. a 32 bit system
> with one 880MB zone and one 15.1GB zone?
>

Another solution is add a new field preferred_zone to the scan_control of
mm/vmscan.c, keep it in mind that new swap strategy is from up to down, from
UserSpace to PrivatePage/SharedPage.