Re: [PATCH] nouveau/hmm: fix nouveau_dmem_chunk allocations

[Jason Gunthorpe <jgg@mellanox.com>]

On Tue, Apr 21, 2020 at 04:11:07PM -0700, Ralph Campbell wrote:
> In nouveau_dmem_init(), a number of struct nouveau_dmem_chunk are allocated
> and put on the dmem->chunk_empty list. Then in nouveau_dmem_pages_alloc(),
> a nouveau_dmem_chunk is removed from the list and GPU memory is allocated.
> However, the nouveau_dmem_chunk is never removed from the chunk_empty
> list nor placed on the chunk_free or chunk_full lists. This results
> in only one chunk ever being actually used (2MB) and quickly leads to
> migration to device private memory failures.
> 
> Fix this by having just one list of free device private pages and if no
> pages are free, allocate a chunk of device private pages and GPU memory.
> 
> Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
> ---
>  drivers/gpu/drm/nouveau/nouveau_dmem.c | 304 +++++++++----------------
>  1 file changed, 112 insertions(+), 192 deletions(-)

Does this generate any conflicts with my series to rework
hmm_range_fault?

Jason