linux-kernel - Re: [PATCH] mm: count only reclaimable lru pages

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Message-ID: <alpine.DEB.1.10.0907161037590.7930@gentwo.org>
Date:	Thu, 16 Jul 2009 10:39:17 -0400 (EDT)
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Peter Zijlstra <peterz@...radead.org>
cc:	Wu Fengguang <fengguang.wu@...el.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Minchan Kim <minchan.kim@...il.com>,
	Johannes Weiner <hannes@...xchg.org>,
	David Howells <dhowells@...hat.com>,
	"riel@...hat.com" <riel@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"tytso@....edu" <tytso@....edu>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"elladan@...imo.com" <elladan@...imo.com>,
	"npiggin@...e.de" <npiggin@...e.de>,
	"Barnes, Jesse" <jesse.barnes@...el.com>
Subject: Re: [PATCH] mm: count only reclaimable lru pages

On Thu, 16 Jul 2009, Peter Zijlstra wrote:

> > What would you suggest?  In fact I'm not totally comfortable with it.
> > Maybe it would be safer to simply stick with the old _lru_pages
> > naming?
>
> Nah, I like the reclaimable name, these pages are at least potentially
> reclaimable.
>
> lru_pages() is definately not correct anymore since you exclude the
> unevictable and possibly the anon pages.

Well lets at least add a comment at the beginning of the functions
explaining that these are potentially reclaimable and list some of the
types of pages that may not be reclaimable.

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