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Date: Wed, 12 Aug 2015 17:35:09 +0300
From: "Kirill A. Shutemov" <kirill@shutemov.name>
Subject: Re: page-flags behavior on compound pages: a worry
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To: Hugh Dickins <hughd@google.com>, David Rientjes <rientjes@google.com>, Vlastimil Babka <vbabka@suse.cz>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>, Andrew Morton <akpm@linux-foundation.org>, Andrea Arcangeli <aarcange@redhat.com>, Dave Hansen <dave.hansen@intel.com>, Mel Gorman <mgorman@suse.de>, Rik van Riel <riel@redhat.com>, Christoph Lameter <cl@gentwo.org>, Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>, Steve Capper <steve.capper@linaro.org>, "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>, Johannes Weiner <hannes@cmpxchg.org>, Michal Hocko <mhocko@suse.cz>, Jerome Marchand <jmarchan@redhat.com>, linux-kernel@vger.kernel.org, linux-mm@kvack.org

On Thu, Aug 06, 2015 at 12:24:22PM -0700, Hugh Dickins wrote:
> > IIUC, the only potentially problematic callsites left are physical memory
> > scanners. This code requires audit. I'll do that.
> 
> Please.

I haven't finished the exercise yet. But here's an issue I believe present
in current *Linus* tree: