Re: [PATCH net-next v24 07/13] net: support non paged skb frags

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To: Mina Almasry <almasrymina@xxxxxxxxxx>
Subject: Re: [PATCH net-next v24 07/13] net: support non paged skb frags
From: Jakub Kicinski <kuba@xxxxxxxxxx>
Date: Tue, 3 Sep 2024 14:31:32 -0700
Cc: netdev@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx, linux-alpha@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linux-parisc@xxxxxxxxxxxxxxx, sparclinux@xxxxxxxxxxxxxxx, linux-trace-kernel@xxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, bpf@xxxxxxxxxxxxxxx, linux-kselftest@xxxxxxxxxxxxxxx, linux-media@xxxxxxxxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx, Donald Hunter <donald.hunter@xxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, Eric Dumazet <edumazet@xxxxxxxxxx>, Paolo Abeni <pabeni@xxxxxxxxxx>, Jonathan Corbet <corbet@xxxxxxx>, Richard Henderson <richard.henderson@xxxxxxxxxx>, Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>, Matt Turner <mattst88@xxxxxxxxx>, Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>, "James E.J. Bottomley" <James.Bottomley@xxxxxxxxxxxxxxxxxxxxx>, Helge Deller <deller@xxxxxx>, Andreas Larsson <andreas@xxxxxxxxxxx>, Jesper Dangaard Brouer <hawk@xxxxxxxxxx>, Ilias Apalodimas <ilias.apalodimas@xxxxxxxxxx>, Steven Rostedt <rostedt@xxxxxxxxxxx>, Masami Hiramatsu <mhiramat@xxxxxxxxxx>, Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Steffen Klassert <steffen.klassert@xxxxxxxxxxx>, Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>, David Ahern <dsahern@xxxxxxxxxx>, Willem de Bruijn <willemdebruijn.kernel@xxxxxxxxx>, "Björn Töpel" <bjorn@xxxxxxxxxx>, Magnus Karlsson <magnus.karlsson@xxxxxxxxx>, Maciej Fijalkowski <maciej.fijalkowski@xxxxxxxxx>, Jonathan Lemon <jonathan.lemon@xxxxxxxxx>, Shuah Khan <shuah@xxxxxxxxxx>, Alexei Starovoitov <ast@xxxxxxxxxx>, Daniel Borkmann <daniel@xxxxxxxxxxxxx>, John Fastabend <john.fastabend@xxxxxxxxx>, Sumit Semwal <sumit.semwal@xxxxxxxxxx>, "Christian König" <christian.koenig@xxxxxxx>, Pavel Begunkov <asml.silence@xxxxxxxxx>, David Wei <dw@xxxxxxxxxxx>, Jason Gunthorpe <jgg@xxxxxxxx>, Yunsheng Lin <linyunsheng@xxxxxxxxxx>, Shailend Chand <shailend@xxxxxxxxxx>, Harshitha Ramamurthy <hramamurthy@xxxxxxxxxx>, Shakeel Butt <shakeel.butt@xxxxxxxxx>, Jeroen de Borst <jeroendb@xxxxxxxxxx>, Praveen Kaligineedi <pkaligineedi@xxxxxxxxxx>, Bagas Sanjaya <bagasdotme@xxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Nikolay Aleksandrov <razor@xxxxxxxxxxxxx>, Taehee Yoo <ap420073@xxxxxxxxx>
In-reply-to: <20240831004313.3713467-8-almasrymina@google.com>
References: <20240831004313.3713467-1-almasrymina@google.com> <20240831004313.3713467-8-almasrymina@google.com>

On Sat, 31 Aug 2024 00:43:07 +0000 Mina Almasry wrote:
> Make skb_frag_page() fail in the case where the frag is not backed
> by a page, and fix its relevant callers to handle this case.
> 
> Signed-off-by: Mina Almasry <almasrymina@xxxxxxxxxx>
> Reviewed-by: Eric Dumazet <edumazet@xxxxxxxxxx>

Reviewed-by: Jakub Kicinski <kuba@xxxxxxxxxx>

References:
- [PATCH net-next v24 00/13] Device Memory TCP
  - From: Mina Almasry
- [PATCH net-next v24 07/13] net: support non paged skb frags
  - From: Mina Almasry

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