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

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Message-ID: <4df04b840701111846j747a387fj73e1739c83bd3335@mail.gmail.com>
Date:	Fri, 12 Jan 2007 10:46:55 +0800
From:	"yunfeng zhang" <zyf.zeroos@...il.com>
To:	"Rik van Riel" <riel@...hat.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.16.29 1/1] MM: enhance Linux swap subsystem

2007/1/11, yunfeng zhang <zyf.zeroos@...il.com>:
2007/1/11, Rik van Riel <riel@...hat.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.
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