[PATCH 1/2] drm/ttm: Allow direct reclaim to allocate local memory

[Alex Deucher]

+ dri-devel

On Tue, Jul 2, 2024 at 1:40 PM Rajneesh Bhardwaj
<rajneesh.bhardwaj at amd.com> wrote:
>
> Limiting the allocation of higher order pages to the closest NUMA node
> and enabling direct memory reclaim provides not only failsafe against
> situations when memory becomes too much fragmented and the allocator is
> not able to satisfy the request from the local node but falls back to
> remote pages (HUGEPAGE) but also offers performance improvement.
> Accessing remote pages suffers due to bandwidth limitations and could be
> avoided if memory becomes defragmented and in most cases without using
> manual compation.
>
> Signed-off-by: Rajneesh Bhardwaj <rajneesh.bhardwaj at amd.com>
> ---
>  drivers/gpu/drm/ttm/ttm_pool.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c
> index 6e1fd6985ffc..cc27d5c7afe8 100644
> --- a/drivers/gpu/drm/ttm/ttm_pool.c
> +++ b/drivers/gpu/drm/ttm/ttm_pool.c
> @@ -91,7 +91,7 @@ static struct page *ttm_pool_alloc_page(struct ttm_pool *pool, gfp_t gfp_flags,
>          */
>         if (order)
>                 gfp_flags |= __GFP_NOMEMALLOC | __GFP_NORETRY | __GFP_NOWARN |
> -                       __GFP_KSWAPD_RECLAIM;
> +                       __GFP_RECLAIM | __GFP_THISNODE;
>
>         if (!pool->use_dma_alloc) {
>                 p = alloc_pages_node(pool->nid, gfp_flags, order);
> --
> 2.34.1
>