linux-kernel - Re: Accounting problem of MIGRATE

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Date:	Fri, 22 Jun 2012 22:59:03 -0400
From:	KOSAKI Motohiro <kosaki.motohiro@...il.com>
To:	Minchan Kim <minchan@...nel.org>
CC:	undisclosed-recipients:;
	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	Aaditya Kumar <aaditya.kumar.30@...il.com>,
	Mel Gorman <mel@....ul.ie>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: Accounting problem of MIGRATE_ISOLATED freed page


One more.


> +/*
> + * NOTE:
> + * Don't use set_pageblock_migratetype(page, MIGRATE_ISOLATE) direclty.
> + * Instead, use {un}set_pageblock_isolate.
> + */
>  void set_pageblock_migratetype(struct page *page, int migratetype)
>  {
>         if (unlikely(page_group_by_mobility_disabled))

I don't think we need this comment. please just add BUG_ON.

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