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SubjectRe: [Nouveau] kernel spew from nouveau/ swiotlb
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On Thu, 2018-05-10 at 17:31 +0200, Mike Galbraith wrote:
> On Thu, 2018-05-10 at 10:31 -0400, Jerome Glisse wrote:
> >
> > Could you bisect ? I would love to point finger upstream to the DMA
> > folk who made changes to that API without testing with GPU.
>
> Rummaging a bit, it might be...
>

(unsend, whack duplicate line, munge, send;)

> nouveau_bo_new()
> ...
> ttm_dma_pool_alloc_new_pages()
> dma_alloc_attrs()
> ops->alloc() == x86_swiotlb_alloc_coherent()
> x86_swiotlb_alloc_coherent() flags |= __GFP_NOWARN;
> swiotlb_alloc_coherent(..flags)
> swiotlb_alloc_coherent(..flags) attrs = (flags & __GFP_NOWARN) ? DMA_ATTR_NO_WARN : 0;
> swiotlb_alloc_buffer(..attrs)
*  swiotlb_tbl_map_single(..0) passed 0 vs attrs, gripeage follows

Or something like that.

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