linux-kernel - Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into KVA

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Message-ID: <55CCD5EC.8000509@sr71.net>
Date:	Thu, 13 Aug 2015 10:37:48 -0700
From:	Dave Hansen <dave@...1.net>
To:	Boaz Harrosh <boaz@...xistor.com>, Christoph Hellwig <hch@....de>
CC:	Dan Williams <dan.j.williams@...el.com>,
	linux-kernel@...r.kernel.org, axboe@...nel.dk, riel@...hat.com,
	linux-nvdimm@...ts.01.org, linux-mm@...ck.org, mgorman@...e.de,
	torvalds@...ux-foundation.org
Subject: Re: [PATCH v5 2/5] allow mapping page-less memremaped areas into
 KVA

On 08/13/2015 07:48 AM, Boaz Harrosh wrote:
> There is already an object that holds a relationship of physical
> to Kernel-virtual. It is called a memory-section. Why not just
> widen its definition?

Memory sections are purely there to map physical address ranges back to
metadata about them.  *Originally* for 'struct page', but widened a bit
subsequently.  But, it's *never* been connected to kernel-virtual
addresses in any way that I can think of.

So, that's a curious statement.
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