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Date: Fri, 10 Nov 2023 15:19:35 -0800
From: Jakub Kicinski <kuba@kernel.org>
To: Mina Almasry <almasrymina@google.com>
Subject: Re: [RFC PATCH v3 08/12] net: support non paged skb frags
Message-ID: <20231110151935.0859fd7a@kernel.org>
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Cc: linux-arch@vger.kernel.org,
 Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
 Jeroen de Borst <jeroendb@google.com>,
 Jesper Dangaard Brouer <hawk@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
 Christian =?UTF-8?B?S8O2bmln?= <christian.koenig@amd.com>,
 netdev@vger.kernel.org, David Ahern <dsahern@kernel.org>,
 Ilias Apalodimas <ilias.apalodimas@linaro.org>, linux-kernel@vger.kernel.org,
 dri-devel@lists.freedesktop.org, Sumit Semwal <sumit.semwal@linaro.org>,
 linaro-mm-sig@lists.linaro.org, Eric Dumazet <edumazet@google.com>,
 Shakeel Butt <shakeelb@google.com>, linux-kselftest@vger.kernel.org,
 Praveen Kaligineedi <pkaligineedi@google.com>, Paolo Abeni <pabeni@redhat.com>,
 Shuah Khan <shuah@kernel.org>, "David S. Miller" <davem@davemloft.net>,
 linux-media@vger.kernel.org
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On Sun,  5 Nov 2023 18:44:07 -0800 Mina Almasry wrote:
>  #include <net/net_debug.h>
>  #include <net/dropreason-core.h>
> +#include <net/page_pool/types.h>
> +#include <net/page_pool/helpers.h>

>  /**
>   * DOC: skb checksums
> @@ -3402,15 +3404,38 @@ static inline void skb_frag_off_copy(skb_frag_t *fragto,
>  	fragto->bv_offset = fragfrom->bv_offset;
>  }
>  
> +/* Returns true if the skb_frag contains a page_pool_iov. */
> +static inline bool skb_frag_is_page_pool_iov(const skb_frag_t *frag)
> +{
> +	return page_is_page_pool_iov(frag->bv_page);
> +}

Maybe we can create a new header? For skb + page pool.

skbuff.h is included by 1/4th of the kernel objects, we should not
be adding dependencies to this header, it really slows down incremental
builds.