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Stanislav Fomichev says: ==================== First patch adds custom getsockopt for TCP_ZEROCOPY_RECEIVE to remove kmalloc and lock_sock overhead from the dat path. Second patch removes kzalloc/kfree from getsockopt for the common cases. Third patch switches cgroup_bpf_enabled to be per-attach to to add only overhead for the cgroup attach types used on the system. No visible user-side changes. v9: - include linux/tcp.h instead of netinet/tcp.h in sockopt_sk.c - note that v9 depends on the commit4be34f3d07("bpf: Don't leak memory in bpf getsockopt when optlen == 0") from bpf tree v8: - add bpi.h to tools/include/uapi in the same patch (Martin KaFai Lau) - kmalloc instead of kzalloc when exporting buffer (Martin KaFai Lau) - note that v8 depends on the commit4be34f3d07("bpf: Don't leak memory in bpf getsockopt when optlen == 0") from bpf tree v7: - add comment about buffer contents for retval != 0 (Martin KaFai Lau) - export tcp.h into tools/include/uapi (Martin KaFai Lau) - note that v7 depends on the commit4be34f3d07("bpf: Don't leak memory in bpf getsockopt when optlen == 0") from bpf tree v6: - avoid indirect cost for new bpf_bypass_getsockopt (Eric Dumazet) v5: - reorder patches to reduce the churn (Martin KaFai Lau) v4: - update performance numbers - bypass_bpf_getsockopt (Martin KaFai Lau) v3: - remove extra newline, add comment about sizeof tcp_zerocopy_receive (Martin KaFai Lau) - add another patch to remove lock_sock overhead from TCP_ZEROCOPY_RECEIVE; technically, this makes patch #1 obsolete, but I'd still prefer to keep it to help with other socket options v2: - perf numbers for getsockopt kmalloc reduction (Song Liu) - (sk) in BPF_CGROUP_PRE_CONNECT_ENABLED (Song Liu) - 128 -> 64 buffer size, BUILD_BUG_ON (Martin KaFai Lau) ==================== Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Linux kernel
============
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