linux-kernel - Re: [RFC] memory-hotplug: remove MIGRATE_ISOLATE from free_area->free

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Message-ID: <xa1tr4q8w8b3.fsf@mina86.com>
Date:	Tue, 11 Sep 2012 23:36:48 +0200
From:	Michal Nazarewicz <mina86@...a86.com>
To:	Minchan Kim <minchan@...nel.org>
Cc:	Kamezawa Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Mel Gorman <mgorman@...e.de>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, Mel Gorman <mel@....ul.ie>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: Re: [RFC] memory-hotplug: remove MIGRATE_ISOLATE from free_area->free_list

On Tue, Sep 11 2012, Minchan Kim wrote:
> I saw two bug report about MIGRATE_ISOALTE type and NR_FREE_PAGES accounting
> mistmatch problem until now and I think we can meet more problems
> in the near future without solving it.
>
> Maybe, [1] would be a solution but I really don't like to add new branch
> in hotpath, even MIGRATE_ISOLATE used very rarely.
> so, my patch is inpired. If there is another good idea that avoid
> new branch in hotpath and solve the fundamental problem, I will drop this
> patch.
>
> [1] http://permalink.gmane.org/gmane.linux.kernel.mm/85199.

Well...  I am still not convinced.

Than again you clearly have put some thought into it and, more
importantly, I'm not the one deciding whether this gets merged or
not, anyway. ;)

-- 
Best regards,                                         _     _
.o. | Liege of Serenely Enlightened Majesty of      o' \,=./ `o
..o | Computer Science,  Michał “mina86” Nazarewicz    (o o)
ooo +----<email/xmpp: mpn@...gle.com>--------------ooO--(_)--Ooo--

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