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Date: Tue, 19 Dec 2017 16:03:32 +0100
From: Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH 14/17] memremap: simplify duplicate region handling in
	devm_memremap_pages
Message-ID: <20171219150332.GB13124@lst.de>
References: <20171215140947.26075-1-hch@lst.de> <20171215140947.26075-15-hch@lst.de> <CAPcyv4i2naLJjWzm+q0ORRfyHkT0f5dFBFKutuaXE3OgPcHX5g@mail.gmail.com>
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To: Dan Williams <dan.j.williams@intel.com>
Cc: Christoph Hellwig <hch@lst.de>, =?iso-8859-1?B?Suly9G1l?= Glisse <jglisse@redhat.com>, Logan Gunthorpe <logang@deltatee.com>, "linux-nvdimm@lists.01.org" <linux-nvdimm@lists.01.org>, linuxppc-dev <linuxppc-dev@lists.ozlabs.org>, X86 ML <x86@kernel.org>, Linux MM <linux-mm@kvack.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>

On Sun, Dec 17, 2017 at 09:34:11AM -0800, Dan Williams wrote:
> This is not racy, we'll catch the error on insert, and I think the
> extra debug information is useful for debugging a broken memory map or
> alignment math.

We can check for -D?EXIST and print the warning, but it's a weird pattern
for sure.

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