Re: remap_page_range problem on 2.3.x

[Andy Henroid <andy_henroid@yahoo.com>]

--- Thomas Sailer <sailer@ife.ee.ethz.ch> wrote:
> Andy Henroid wrote:
> 
> > Yes, the remap_page_range is done indirectly
> > through mmap call to the /dev/mem driver.
> 
> I think I saw this too some time ago.
> 
> I tried to duplicate the kernel's view of the
> address space above 0xc0000000 at an offset in
> a usermode program. I ended up being able to
> read the correct data from /dev/mem, but reading
> from an mmaped page from /dev/mem returned
> completely bogus data (all zero).

Yes, the read through /dev/mem work for me too.
It looks like remap_page_range is doing the right
thing and it certainly works for other remapping.
I wonder what the problem is?

Oh well, low priority compared to the other things
that need to get fixed as we move into pre2.4

Thanks,
Andy

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