Re: ZONE_DMA (was: Re: 2.6.19 -mm merge plans)

Alan Cox
2006-09-21T00:40:20Z

Ar Mer, 2006-09-20 am 17:31 -0700, ysgrifennodd Christoph Lameter:
> ZONE_DMA does not have a bright future with IOMMUs and other things
> around. None of my system uses ZONE_DMA and I have a variety of them.

IOMMUs don't always help. They IOMMU aperture on AMD64 for example is
too high to help devices with below 32bit limits.