linux-kernel - Re: [PATCH 07/10] mbind: add hugepage migration code to mbind()

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Date:	Mon, 08 Apr 2013 16:25:29 -0400
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...il.com>
Cc:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>, Hugh Dickins <hughd@...gle.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Andi Kleen <andi@...stfloor.org>,
	Hillf Danton <dhillf@...il.com>, Michal Hocko <mhocko@...e.cz>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 07/10] mbind: add hugepage migration code to mbind()

On Fri, Apr 05, 2013 at 06:18:02PM -0400, KOSAKI Motohiro wrote:
> > @@ -1277,14 +1279,10 @@ static long do_mbind(unsigned long start, unsigned long len,
> >  	if (!err) {
> >  		int nr_failed = 0;
> >  
> > -		if (!list_empty(&pagelist)) {
> > -			WARN_ON_ONCE(flags & MPOL_MF_LAZY);
> > -			nr_failed = migrate_pages(&pagelist, new_vma_page,
> > +		WARN_ON_ONCE(flags & MPOL_MF_LAZY);
> 
> ???
> MPOL_MF_LAZY always output warn? It seems really insane.

So I'll stop replacing this block into migrate_movable_pages() and
leave this WARN as it is.
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