User allocated memory for DMA

[Amit K Tiwari]

This is 2.6.6 (64 bit Yellow Dog Linux from Terrasoft for Apple XServe)

Amit K T

On Tue, 07 Dec 2004 18:09:48 +1100, Benjamin Herrenschmidt
<benh at kernel.crashing.org> wrote:
> On Mon, 2004-12-06 at 18:29 +0530, Amit K Tiwari wrote:
> 
> > My problem is that at step 3 I do not get any contiguous region.
> > Surprisingly, some of the physical addresses are such that the low
> > order page (say page 151) has high order physical address (say,
> > 1ef234000) while the next high order page (say page 152) has the next
> > lower physical address(say 1ef233000) and this trend continues for
> > some 10 pages after which the addresses totally far apart.
> 
> What kernel version is this ? I remember something about the default
> allocation "direction" of pages beeing changed a while ago...
> 
> Ben.
> 
>