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c204fef97e
sysctl_mem_pcpu_rsv is used in TCP fast path, move it to net_hodata for better cache locality. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: David Ahern <dsahern@kernel.org> Link: https://lore.kernel.org/r/20240429134025.1233626-6-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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#ifndef _PROTO_MEMORY_H
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#define _PROTO_MEMORY_H
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#include <net/sock.h>
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#include <net/hotdata.h>
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/* 1 MB per cpu, in page units */
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#define SK_MEMORY_PCPU_RESERVE (1 << (20 - PAGE_SHIFT))
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static inline bool sk_has_memory_pressure(const struct sock *sk)
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{
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return sk->sk_prot->memory_pressure != NULL;
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}
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static inline bool
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proto_memory_pressure(const struct proto *prot)
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{
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if (!prot->memory_pressure)
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return false;
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return !!READ_ONCE(*prot->memory_pressure);
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}
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static inline bool sk_under_global_memory_pressure(const struct sock *sk)
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{
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return proto_memory_pressure(sk->sk_prot);
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}
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static inline bool sk_under_memory_pressure(const struct sock *sk)
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{
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if (!sk->sk_prot->memory_pressure)
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return false;
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if (mem_cgroup_sockets_enabled && sk->sk_memcg &&
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mem_cgroup_under_socket_pressure(sk->sk_memcg))
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return true;
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return !!READ_ONCE(*sk->sk_prot->memory_pressure);
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}
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static inline long
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proto_memory_allocated(const struct proto *prot)
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{
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return max(0L, atomic_long_read(prot->memory_allocated));
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}
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static inline long
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sk_memory_allocated(const struct sock *sk)
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{
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return proto_memory_allocated(sk->sk_prot);
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}
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static inline void proto_memory_pcpu_drain(struct proto *proto)
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{
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int val = this_cpu_xchg(*proto->per_cpu_fw_alloc, 0);
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if (val)
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atomic_long_add(val, proto->memory_allocated);
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}
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static inline void
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sk_memory_allocated_add(const struct sock *sk, int val)
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{
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struct proto *proto = sk->sk_prot;
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val = this_cpu_add_return(*proto->per_cpu_fw_alloc, val);
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if (unlikely(val >= READ_ONCE(net_hotdata.sysctl_mem_pcpu_rsv)))
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proto_memory_pcpu_drain(proto);
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}
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static inline void
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sk_memory_allocated_sub(const struct sock *sk, int val)
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{
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struct proto *proto = sk->sk_prot;
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val = this_cpu_sub_return(*proto->per_cpu_fw_alloc, val);
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if (unlikely(val <= -READ_ONCE(net_hotdata.sysctl_mem_pcpu_rsv)))
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proto_memory_pcpu_drain(proto);
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}
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#endif /* _PROTO_MEMORY_H */
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