lkml.org 
[lkml]   [2004]   [Mar]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: can device drivers return non-ram via vm_ops->nopage?
On Sun, Mar 21, 2004 at 08:45:14PM +0000, David Woodhouse wrote:
> There are machines where DMA to/from main memory _cannot_ be coherent
> but we have some memory elsewhere, perhaps some SRAM which itself is
> hanging off an I/O bus somewhere, which can be used. One of my toys is
> currently running with dma_alloc_coherent() giving out memory from a PCI
> video card, in fact.
>
> Using a PFN should be OK.

And what exactly is a PFN without associated struct page supposed to mean?

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:01    [W:0.094 / U:0.204 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site