linux-kernel - Re: [patch 05/19] split LRU lists into anon & file sets

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Message-ID: <20080109213721.2ef2e5f3@bree.surriel.com>
Date:	Wed, 9 Jan 2008 21:37:21 -0500
From:	Rik van Riel <riel@...hat.com>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Lee Schermerhorn <Lee.Schermerhorn@...com>
Subject: Re: [patch 05/19] split LRU lists into anon & file sets

On Thu, 10 Jan 2008 11:28:49 +0900
KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com> wrote:

> Hmm, it seems..
> 
> When a program copies large amount of files, recent_rotated_file increases
> rapidly and 
> 
>     rotate_sum
>     ----------
> recent_rotated_anon
> 
> will be very big.
> 
> And %ap will be big regardless of vm_swappiness  if it's not 0.
> 
> I think # of recent_successful_pageout(anon/file) should be took into account...
> 
> I'm sorry if I miss something.

You are right.  I wonder if this, again, is a case of myself or
Lee forward porting old code.  I remember having (had) a very
different version of get_scan_ratio() at some point in the past,
but I cannot remember if we discarded this version for that other
version, or the other way around :(

Lee, would you by any chance still have some alternative versions
of get_scan_ratio() around?  I'm searching through my systems, but
have not found it yet...

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