linux-kernel - Re: [PATCH 2.6.21] cramfs: add cramfs Linear XIP

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Message-ID: <6934efce0706121711m738bd9abqa02350ccc7eabf9f@mail.gmail.com>
Date:	Tue, 12 Jun 2007 17:11:20 -0700
From:	"Jared Hulbert" <jaredeh@...il.com>
To:	carsteno@...ibm.com
Cc:	"Nick Piggin" <nickpiggin@...oo.com.au>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	richard.griffiths@...driver.com,
	"Richard Griffiths" <res07ml0@...izon.net>,
	Linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.21] cramfs: add cramfs Linear XIP

> Nick Piggin wrote:
> > The question is, why is that not enough (I haven't looked at these
> > patches enough to work out if there is anything more they provide).
> I think, it just takes trying things out. From reading the code, I
> think this should work well for the filemap_xip code with no struct page.
> Also, we need eliminate nopage() to get rid of the struct page.
> Unfortunately I don't find time to try this out for now, and on 390 we
> can live with struct page for the time being. In contrast to the
> embedded platforms, the mem_mep array gets swapped out to disk by our
> hypervisor.

Can you help me understand the comment about nopage()?  Do you mean
set xip_file_vm_ops.nopage to NULL?
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