Christoph Lameter writes: > > The DMA zone is for memory allocations _for_ _DMA_. If all your memory > > is DMA-able then it belongs in the DMA zone. > > Nope. The DMA zone is for crappy DMA devices that can only use a portion > of memory. That is (presumably) true today, but is in fact a redefinition of what ZONE_DMA historically was for. Also there is the problem that some drivers use ZONE_DMA allocations because their device can only generate addresses below some limit, but on a platform with an IOMMU there is in fact no restriction on what memory the device can access. Paul. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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