Messages in this thread | | | Date | Mon, 31 Jan 2000 08:44:48 -0600 (CST) | From | Jeff Garzik <> | Subject | Re: Updated 2.3.x job list (its getting shorter) |
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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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