Re: Areca driver recap + status

[Alan Cox]

Ar Maw, 2006-06-27 am 10:27 -0500, ysgrifennodd James Bottomley:
> On a PAE platform, dma_addr_t is u64 and unsigned long is u32, so any
> address > 4GB will be truncated by these operations.
> 
> I think all this does is cause a slow leak of dma mappings, and on any
> kernel > 2.6.16 the leak should be even smaller, since we've severely
> restricted the use_sg == 0 case.  It probably is only significant on
> x86_64 with the gart iommu enabled.

On x86_64 the dma_addr_t and the ulong are both 64bit so the problem
doesn't arise. 

Alan

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