[ath9k-devel] Dirty Laundry List

[Luis R. Rodriguez <lrodriguez@atheros.com>]

On Thu, Nov 20, 2008 at 03:23:19PM -0800, Alistair John Strachan wrote:
> On Thursday 20 November 2008 19:32:47 Luis R. Rodriguez wrote:
> [snip]
> > > * PCI/DMA suckage ( SWIOTLB issue on macbooks )
> >
> > Taken, need a MacBook pro 3.1 tester.
> 
> Why does this have to be a MacBook Pro 3.1? If the ath9k driver's got swiotlb
> issues it should be possible to use any supported hardware in combination with
> the sw-iommu right? The IOMMU can be forced on with machines less than ~4GB,
> so just about anybody could test it.

You would think right!? Have you seen the bug report?

http://bugzilla.kernel.org/show_bug.cgi?id=11811

> If any of the above is correct, I've got a machine I could test the fix on.

I've been testing on iommu=soft swiotlb=force mem=4G while doing all
sorts of other memory intensive DMA things but no luck. So something is
peculiar about the MacBook pro 3.1. So we have patches now, so what we
need is to see if it still occurs with such patches. If anyone has a
MacBook pro 3.1 and is willing to test please let me know.

  Luis