Re: [discuss] Re: Please pull x86-64 bug fixes

Andi Kleen
2006-10-16T12:21:39Z

On Friday 06 October 2006 13:14, Alan Cox wrote:
> Ar Iau, 2006-10-05 am 23:44 +0200, ysgrifennodd Andi Kleen:
> > I think we had that argument before. IMHO such messages are completely
> > useless. Hangs are not acceptable no matter what messages are printed
> > before.
>
> Oh so you plan to fix the iommu/aacraid problem you always said you
> wouldn't fix ?

They don't cause hangs, just IO errors (or panics if you configure
iommu debugging)

Actually I plan to fix this one, but it will require more work.
Basically the plan is to make the current dma zone variable sized
and get rid of all GFP_DMA allocations. Merge the current soft iommu
with that new dma allocator. Then make sure all allocations
that need such low dma use a mask argument to some allocator.

Then we can have a option to configure the size of the dma low zone.
Users of broken hardware just configure a larger size.

-Andi