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

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Message-Id: <1247754491.6586.23.camel@laptop>
Date:	Thu, 16 Jul 2009 16:28:11 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	Christoph Lameter <cl@...ux-foundation.org>,
	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, 2009-07-16 at 22:25 +0800, Wu Fengguang wrote:
> > Reclaimable? Are all pages on the LRUs truly reclaimable?
> 
> No, only possibly reclaimable :)
> 
> 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.

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