On Sun, Jun 26, 2005 at 11:30:04AM -0300, Marcelo Tosatti wrote:

Hi Dan,

On Sat, Jun 25, 2005 at 06:24:47PM -0400, Dan Malek wrote:

quoted

On Jun 25, 2005, at 10:53 AM, Marcelo Tosatti wrote:

quoted

Dan: I dont think ioremap() is an issue because it never works inside 
the
kernel's static virtual address space (which is the only one we're 
interested
in having pinned at the moment).

Take a close look at the initialization code.  I believe it also
pins the IMMR space, which is subject to ioremap().

OK. Now that makes me think that the IMMR pinned entry is also always
thrashed by the tlbie at map_page() :(

Bullshit, map_page()'s call for flush_HPTE() is conditioned by "mem_init_done", 
and mapin_ram() is called before mem_init_done is set.

The IMMR space is a 16kB window (correct?), so I wonder if it might
be better to the use occupied pinned slot for another more accessed
region (an 8MB one preferably!).

Thats still some food for thought...