Re: DMA memory allocation --how to more than 1 MB

[Christian Leber <christian@leber.de>]

On Tue, Oct 19, 2004 at 11:18:13AM +0530, Srinivas G. wrote:
> I have a doubt about allocating the DMA memory using kmalloc OR
> __get_dma_pages OR pci_alloc_consistent. I was unable to allocate the
> memory greater than 1 MB using any one of the above memory functions. 
> 
> Is there any other method which will allocate the DMA memory greater
> than 1 MB?

You should be able to get at least order 9, therefore 2 MB.
With kernel 2.6 you should also be able to get order 10, therefore 4 MB.
If you need more you have to puzzle the areas together.

The way wli suggested is better.
But if this is no possible just make it a requierement to load the
module while booting, then there are enough free areas.


Christian Leber

-- 
  "Omnis enim res, quae dando non deficit, dum habetur et non datur,
   nondum habetur, quomodo habenda est."       (Aurelius Augustinus)
  Translation: <http://gnuhh.org/work/fsf-europe/augustinus.html>