linux-kernel - Re: [PATCH]mm/page_alloc.c: no need del from lru

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Message-ID: <20110506180646.GF6330@random.random>
Date:	Fri, 6 May 2011 20:06:46 +0200
From:	Andrea Arcangeli <aarcange@...hat.com>
To:	"Figo.zhang" <figo1802@...il.com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>, mel@....ul.ie,
	kamezawa.hiroyu@...fujisu.com, Minchan Kim <minchan.kim@...il.com>,
	Andrew Morton <akpm@...l.org>
Subject: Re: [PATCH]mm/page_alloc.c: no need del from lru

Hello,

On Fri, May 06, 2011 at 11:01:21PM +0800, Figo.zhang wrote:
> 
> split_free_page() the page is still free page, it is no need del from lru.

This is in the buddy freelist, see the other list_add in
page_alloc.c. It's not the lru as in release_pages. I see little
chance that if this was wrong it could go unnoticed so long without
major mm corruption reported. Removing it also should result in heavy
mm corruption.

Thanks,
Andrea
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