linux-kernel - Re: [RFC] memory hotremove patch take 2 [02/10] (make page unused)

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Message-Id: <20070511094918.aba0b4e2.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Fri, 11 May 2007 09:49:18 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Christoph Lameter <clameter@....com>
Cc:	y-goto@...fujitsu.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, akpm@...l.org, mel@....ul.ie
Subject: Re: [RFC] memory hotremove patch take 2 [02/10] (make page unused)

On Thu, 10 May 2007 11:04:37 -0700 (PDT)
Christoph Lameter <clameter@....com> wrote:

> On Wed, 9 May 2007, Yasunori Goto wrote:
> 
> > This patch is for supporting making page unused.
> > 
> > Isolate pages by capturing freed pages before inserting free_area[],
> > buddy allocator.
> > If you have an idea for avoiding spin_lock(), please advise me.
> 
> Using the zone lock instead may avoid to introduce another lock? Or is the 
> new lock here for performance reasons?
> 
> Isnt it possible to just add another flavor of pages like what Mel has 
> been doing with reclaimable and movable? I.e. add another category of free 
> pages to Mel's scheme called isolated and use Mel's function to move stuff 
> over there?
> 
Mel-san's idea seems good. So we'll rewrite the whole this patch.

Thank you.
-Kame

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