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7997bca6c2
linux
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include
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net
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aligned_data.h
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net: add struct net_aligned_data This structure will hold networking data that must consume a full cache line to avoid accidental false sharing. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250630093540.3052835-2-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-06-30 09:35:37 +00:00
net: move net_cookie into net_aligned_data Using per-cpu data for net->net_cookie generation is overkill, because even busy hosts do not create hundreds of netns per second. Make sure to put net_cookie in a private cache line to avoid potential false sharing. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250630093540.3052835-3-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-06-30 09:35:38 +00:00
net: add struct net_aligned_data This structure will hold networking data that must consume a full cache line to avoid accidental false sharing. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250630093540.3052835-2-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-06-30 09:35:37 +00:00
net: move net_cookie into net_aligned_data Using per-cpu data for net->net_cookie generation is overkill, because even busy hosts do not create hundreds of netns per second. Make sure to put net_cookie in a private cache line to avoid potential false sharing. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250630093540.3052835-3-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-06-30 09:35:38 +00:00
tcp: move tcp_memory_allocated into net_aligned_data ____cacheline_aligned_in_smp attribute only makes sure to align a field to a cache line. It does not prevent the linker to use the remaining of the cache line for other variables, causing potential false sharing. Move tcp_memory_allocated into a dedicated cache line. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250630093540.3052835-4-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-06-30 09:35:39 +00:00
udp: move udp_memory_allocated into net_aligned_data ____cacheline_aligned_in_smp attribute only makes sure to align a field to a cache line. It does not prevent the linker to use the remaining of the cache line for other variables, causing potential false sharing. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250630093540.3052835-5-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-06-30 09:35:40 +00:00
tcp: move tcp_memory_allocated into net_aligned_data ____cacheline_aligned_in_smp attribute only makes sure to align a field to a cache line. It does not prevent the linker to use the remaining of the cache line for other variables, causing potential false sharing. Move tcp_memory_allocated into a dedicated cache line. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250630093540.3052835-4-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-06-30 09:35:39 +00:00
net: add struct net_aligned_data This structure will hold networking data that must consume a full cache line to avoid accidental false sharing. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20250630093540.3052835-2-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-06-30 09:35:37 +00:00
