linux-kernel - Re: [PATCH] compaction: fix COMPACTPAGEFAILED counting

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Message-ID: <AANLkTi=bbRHJ1Wzmm9FTiYzDyKj6PFGWmFqCZNHTNgEb@mail.gmail.com>
Date:	Tue, 24 Aug 2010 10:19:59 +0900
From:	Minchan Kim <minchan.kim@...il.com>
To:	Christoph Lameter <cl@...ux.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel List <linux-kernel@...r.kernel.org>,
	linux-mm@...ck.org, Hugh Dickins <hughd@...gle.com>,
	Andi Kleen <andi@...stfloor.org>, Mel Gorman <mel@....ul.ie>
Subject: Re: [PATCH] compaction: fix COMPACTPAGEFAILED counting

On Tue, Aug 24, 2010 at 2:17 AM, Christoph Lameter <cl@...ux.com> wrote:
> On Tue, 24 Aug 2010, Minchan Kim wrote:
>
>> On Mon, Aug 23, 2010 at 11:41:49AM -0500, Christoph Lameter wrote:
>> > On Tue, 24 Aug 2010, Minchan Kim wrote
>> >
>> > > This patch introude new argument 'cleanup' to migrate_pages.
>> > > Only if we set 1 to 'cleanup', migrate_page will clean up the lists.
>> > > Otherwise, caller need to clean up the lists so it has a chance to postprocess
>> > > the pages.
>> >
>> > Could we simply make migrate_pages simply not do any cleanup?
>> > Caller has to call putback_lru_pages()?
>> >
>> Hmm. maybe I misunderstood your point.
>> Your point is that let's make whole caller of migrate_pagse has a responsibility
>> of clean up the list?
>
> Yes. All callers would be responsible for cleanup.

Yes. I hoped it but try to maintain API semantics.
But if you agree to change it, I will do it.
Will repost.
Thanks, Christoph.



-- 
Kind regards,
Minchan Kim
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