Date: Wed, 30 Jul 2014 02:21:42 +0300
From: "Kirill A. Shutemov" <kirill@shutemov.name>
To: David Rientjes <rientjes@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>,
        Andrew Morton <akpm@linux-foundation.org>,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        Minchan Kim <minchan@kernel.org>, Joonsoo Kim <iamjoonsoo.kim@lge.com>,
        Michal Nazarewicz <mina86@mina86.com>,
        Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
        Christoph Lameter <cl@linux.com>, Rik van Riel <riel@redhat.com>,
        Mel Gorman <mgorman@suse.de>,
        Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Subject: Re: [PATCH v5 05/14] mm, compaction: move pageblock checks up from
 isolate_migratepages_range()
Message-ID: <20140729232142.GB17685@node.dhcp.inet.fi>
References: <1406553101-29326-1-git-send-email-vbabka@suse.cz>
 <1406553101-29326-6-git-send-email-vbabka@suse.cz>
 <alpine.DEB.2.02.1407281709050.8998@chino.kir.corp.google.com>
 <53D7690D.5070307@suse.cz>
 <alpine.DEB.2.02.1407291559130.20991@chino.kir.corp.google.com>
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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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