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Message-ID: <20140729232142.GB17685@node.dhcp.inet.fi>
Date:	Wed, 30 Jul 2014 02:21:42 +0300
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Vlastimil Babka <vbabka@...e.cz>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Minchan Kim <minchan@...nel.org>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Michal Nazarewicz <mina86@...a86.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Christoph Lameter <cl@...ux.com>,
	Rik van Riel <riel@...hat.com>, Mel Gorman <mgorman@...e.de>,
	Zhang Yanfei <zhangyanfei@...fujitsu.com>
Subject: Re: [PATCH v5 05/14] mm, compaction: move pageblock checks up from
 isolate_migratepages_range()

On Tue, Jul 29, 2014 at 04:02:09PM -0700, David Rientjes wrote:
> Hmm, I'm confused at how that could be true, could you explain what 
> memory other than thp can return true for PageTransHuge()?

PageTransHuge() will be true for any head of compound page if THP is
enabled compile time: hugetlbfs, slab, whatever.

-- 
 Kirill A. Shutemov
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