[RFC PATCH net-next v8 07/14] page_pool: devmem support

David Wei dw at davidwei.uk
Sat Apr 27 00:17:52 UTC 2024


On 2024-04-02 5:20 pm, Mina Almasry wrote:
> @@ -69,20 +106,26 @@ net_iov_binding(const struct net_iov *niov)
>   */
>  typedef unsigned long __bitwise netmem_ref;
>  
> +static inline bool netmem_is_net_iov(const netmem_ref netmem)
> +{
> +#if defined(CONFIG_PAGE_POOL) && defined(CONFIG_DMA_SHARED_BUFFER)

I am guessing you added this to try and speed up the fast path? It's
overly restrictive for us since we do not need dmabuf necessarily. I
spent a bit too much time wondering why things aren't working only to
find this :(


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