On 29 Jan 2000, Jes Sorensen wrote:
> >>>>> "James" == James A Simmons <jsimmons@acsu.buffalo.edu> writes:
> James> On Sat, 29 Jan 2000, Alan Cox wrote:
> >> > > vmalloc(GFP_DMA) is needed for DMA drivers > > Will you be able
> >> to allocate several megs for DMA?
> >>
> >> Allocated as random pages - yes. Linear no.
>
> James> And it's useful how?
>
> Lotsa modern hardware will do scatter/gather DMA, very useful indeed.
In a message to lkml a while back, Alan pointed out something which in
retrospect is pretty obvious -- with some tricks, even older hardware
can often do scatter-gather.
Jeff
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