diff options
| author | Eric Dumazet <edumazet@google.com> | 2025-06-30 09:35:39 +0000 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-07-02 14:22:02 -0700 |
| commit | 83081337419cb692eca4ee475d936b1fdcfd49f6 (patch) | |
| tree | 306d7b12294131e5db495b773f9eb5bbddb936cf /net/ipv4/tcp.c | |
| parent | 998642e999d23324c5dbf38149606d09cec2c377 (diff) | |
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>
Diffstat (limited to 'net/ipv4/tcp.c')
| -rw-r--r-- | net/ipv4/tcp.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 8a3c99246d2e..925b2c572ca2 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -302,8 +302,6 @@ EXPORT_PER_CPU_SYMBOL_GPL(tcp_tw_isn); long sysctl_tcp_mem[3] __read_mostly; EXPORT_IPV6_MOD(sysctl_tcp_mem); -atomic_long_t tcp_memory_allocated ____cacheline_aligned_in_smp; /* Current allocated memory. */ -EXPORT_IPV6_MOD(tcp_memory_allocated); DEFINE_PER_CPU(int, tcp_memory_per_cpu_fw_alloc); EXPORT_PER_CPU_SYMBOL_GPL(tcp_memory_per_cpu_fw_alloc); |