Re: [PATCH] [scsi] Remove __GFP_DMA

[Alan Cox]

> > That didn't used to work right on the AMD boards when I tried it last as
> > we ended up with a buffer that was mapped by the IOMMU for some reason
> > and that was not below 2GB.
> 
> The physical address you mean? If that is still happening then it needs 
> to get fixed. The allocation should not succeed if it can't provide 
> memory that's inside the DMA mask for the device..

But the allocation can succeed - using GFP_DMA at least you can do it as
you get memory below 2^24 you don't need to map via the IOMMU
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/