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Miller" , Eric Dumazet , Paolo Abeni , Jonathan Corbet , Richard Henderson , Ivan Kokshaysky , Matt Turner , Thomas Bogendoerfer , "James E.J. Bottomley" , Helge Deller , Andreas Larsson , Jesper Dangaard Brouer , Ilias Apalodimas , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Arnd Bergmann , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Steffen Klassert , Herbert Xu , David Ahern , Willem de Bruijn , Shuah Khan , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= , Bagas Sanjaya , Christoph Hellwig , Pavel Begunkov , David Wei , Jason Gunthorpe , Yunsheng Lin , Shailend Chand , Harshitha Ramamurthy , Shakeel Butt , Jeroen de Borst , Praveen Kaligineedi , Willem de Bruijn , Kaiyuan Zhang References: <20240625195407.1922912-1-almasrymina@google.com> <20240625195407.1922912-12-almasrymina@google.com> Content-Language: en-US From: Nikolay Aleksandrov In-Reply-To: <20240625195407.1922912-12-almasrymina@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 25/06/2024 22:53, Mina Almasry wrote: > Add an interface for the user to notify the kernel that it is done > reading the devmem dmabuf frags returned as cmsg. The kernel will > drop the reference on the frags to make them available for reuse. > > Signed-off-by: Willem de Bruijn > Signed-off-by: Kaiyuan Zhang > Signed-off-by: Mina Almasry > > --- > > v10: > - Fix leak of tokens (Nikolay). > > v7: > - Updated SO_DEVMEM_* uapi to use the next available entry (Arnd). > > v6: > - Squash in locking optimizations from edumazet@google.com. With his > changes we lock the xarray once per sock_devmem_dontneed operation > rather than once per frag. > > Changes in v1: > - devmemtoken -> dmabuf_token (David). > - Use napi_pp_put_page() for refcounting (Yunsheng). > - Fix build error with missing socket options on other asms. > > --- > arch/alpha/include/uapi/asm/socket.h | 1 + > arch/mips/include/uapi/asm/socket.h | 1 + > arch/parisc/include/uapi/asm/socket.h | 1 + > arch/sparc/include/uapi/asm/socket.h | 1 + > include/uapi/asm-generic/socket.h | 1 + > include/uapi/linux/uio.h | 4 ++ > net/core/sock.c | 61 +++++++++++++++++++++++++++ > 7 files changed, 70 insertions(+) > FWIW, Reviewed-by: Nikolay Aleksandrov