On Wed, 7 Oct 2020 18:44:21 +0200
Daniel Vetter wrote:
> Way back it was a reasonable assumptions that iomem mappings never
> change the pfn range they point at. But this has changed:
>
> - gpu drivers dynamically manage their memory nowadays, invalidating
> ptes with unmap_mapping_range when b
On Thu, Oct 8, 2020 at 6:44 PM Gerald Schaefer
wrote:
>
> On Wed, 7 Oct 2020 18:44:21 +0200
> Daniel Vetter wrote:
>
> > Way back it was a reasonable assumptions that iomem mappings never
> > change the pfn range they point at. But this has changed:
> >
> > - gpu drivers dynamically manage their
Way back it was a reasonable assumptions that iomem mappings never
change the pfn range they point at. But this has changed:
- gpu drivers dynamically manage their memory nowadays, invalidating
ptes with unmap_mapping_range when buffers get moved
- contiguous dma allocations have moved from dedic
