Bug#404148: disabling hw iommu on nvidia
On Tuesday 03 April 2007 00:29:16 dann frazier wrote:
> hey Andi,
> Debian is looking at patching our kernel to disable the hw iommu on
> nvidia chipsets for the data corruption bug that's been discussed on
> lkml[1].
It would be better if you waited until the official solution. The
hardware debugging people are working on it. You'll likely get more
problems out of swiotlb because the defaults are too small for high
loads.
> As far as I can tell there isn't an upstream solution yet, but
> Steve Langasek has proposed the following patch which seems to work
> for one of our users. Would you mind taking a look at it and see if
> you can pick out any obvious problems?
You got at least one off by one bug. And SWIOTLB cannot be undefined
with CONFIG_IOMMU so the nested ifdef is useless.
-Andi
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