David Mosberger wrote:
> 
> >>>>> On Mon, 10 Sep 2001 17:26:47 +0200, Steffen Persvold <sp@scali.no> said:
> 
>   Steffen> This is what my original post (which included a patch)
>   Steffen> tried to do, but I didn't get it too work. I know you gave
>   Steffen> me feedback on this David, saying that it just may need
>   Steffen> some debugging. Does anyone on the list have the time to
>   Steffen> just look through the patch and try to analyze what's going
>   Steffen> wrong (or maybe just give me some hints on what to look
>   Steffen> for) ?
> 
> I don't, not in the near future at least.
> 
> There is nothing magical about debugging on ia64.  Just use the normal
> techniques: try to narrow down what's triggering the problem, e.g.,
> via binary search, printk, etc.  A kdb patch is also available.
> 

Yep, I know. But I managed to solve it without the use of kdb. It was just a
question of using the right __pgprot flags. I've attached a new patch, it's made
against 2.4.4 but it also applies cleanly to a vanilla 2.4.9 tree. I guess this
means that we don't have to use the uncached region 6 anymore; ioremap() could
be modified to use __ia64_ioremap() with the _PAGE_MA_WC attribute and
ioremap_nocache() to with the _PAGE_MA_UC attribute. Any comments ?

I sure hope that this is patch that you would consider going into the main ia64
tree.

Regards,
-- 
  Steffen Persvold   |  Scali Computer AS   |   Try out the world's best   
 mailto:sp@scali.no  | http://www.scali.com | performing MPI implementation:
Tel: (+47) 2262 8950 |  Olaf Helsets vei 6  |      - ScaMPI 1.12.2 -         
Fax: (+47) 2262 8951 |  N0621 Oslo, NORWAY  | >300MBytes/s and <4uS latency