[openib-general] Re: [PATCH 2 of 13] ipath - set up 32-bit DMA mask if 64-bit setup fails

[Segher Boessenkool]

>     Segher> PowerPC with U3 or U4 northbridge, i.e. Maple or PowerMac
>     Segher> G5 systems.  If the IOMMU (DART) is disabled, we have a
>     Segher> 32-bit only DMA mask.  The DART will be disabled by
>     Segher> default if there is 2GB or less of memory (as it isn't
>     Segher> needed then).
>
> OK, thanks.  I was not aware of that situation.
>
> However, I suspect that PathScale has a different situation in mind,
> considering that their driver isn't even buildable for that  
> platform ;)

Well (a previous version of) that patch came from me, draw your own
conclusions :-)

And it builds just fine -- what is the problem you're thinking of?


Segher