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Message-ID: <6934efce0706061201o13709f3fu4aa12e6a40fe7e06@mail.gmail.com>
Date: Wed, 6 Jun 2007 12:01:19 -0700
From: "Jared Hulbert" <jaredeh@gmail.com>
To: carsteno@de.ibm.com
Subject: Re: [PATCH 2.6.21] cramfs: add cramfs Linear XIP
Cc: "Nick Piggin" <nickpiggin@yahoo.com.au>,
       "Andrew Morton" <akpm@linux-foundation.org>,
       richard.griffiths@windriver.com,
       "Richard Griffiths" <res07ml0@verizon.net>,
       Linux-kernel@vger.kernel.org
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On 6/6/07, Carsten Otte <cotte@de.ibm.com> wrote:
> Jared Hulbert wrote:
> > (2) failed with the following messages.  (This wasn't really busybox.
> > It was xxd, not statically link, hence the issue with ld.so)
> Could you try to figure what happend to subject page before? Was it
> subject to copy on write? With what flags has this vma been mmaped?
>
> thanks,
> Carsten

The vma->flags = 1875 = 0x753

This is:
VM_READ
VM_WRITE
VM_MAYREAD
VM_MAYEXEC
VM_GROWSDOWN
VM_GROWSUP
VM_PFNMAP

I assume no struct page exists for the pages of this file.  When
vm_no_page was called it seems it failed on a pte check since there is
no backing page structure.
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