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From: "Luck, Tony" <tony.luck@intel.com>
Subject: RE: [PATCH 01/15] avr32: convert to asm-generic/memory_model.h
Date: Mon, 28 Sep 2015 18:44:05 +0000
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References: <20150923043737.36490.70547.stgit@dwillia2-desk3.jf.intel.com>
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To: Christoph Hellwig <hch@infradead.org>, "Williams, Dan J" <dan.j.williams@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>, linux-fsdevel <linux-fsdevel@vger.kernel.org>, Linux MM <linux-mm@kvack.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, linux-nvdimm <linux-nvdimm@ml01.01.org>

> Seems like we should simply introduce a CONFIG_VMEM_MAP for ia64
> to get this started.  Does my memory trick me or did we used to have
> vmem_map on other architectures as well but managed to get rid of it
> everywhere but on ia64?

I think ia64 hung onto this because of the SGI sn1 platforms. They were
even more discontiguous than even SPARSEMEM_EXTREME could handle

-Tony

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