Call for testers: Apple ATA DMA

[Nathan Whitehorn]

Peter Grehan wrote:
> Hi Nathan,
> 
>  > If I can get positive reports from a few more people who were
>> having trouble, I'll drop this in the tree.
> 
>  The imac's ata-4 is working solidly at UDMA-66. The difference in CPU 
> usage and i/o with dd at 32k block size is stunning: 2MB/7% idle before, 
> 18MB/75% idle with your patch.

I guess DMA is a useful technology :)

Thanks for testing -- I've committed the patch. I'll revisit it when 
Marcel tests it on Monday and it erases his hard drive...
-Nathan