netns-ipv4: reorganize netns_ipv4 fast path variables

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Reorganize fast path variables on tx-txrx-rx order.
Fastpath cacheline ends after sysctl_tcp_rmem.
There are only read-only variables here. (write is on the control path
and not considered in this case)

Below data generated with pahole on x86 architecture.
Fast path variables span cache lines before change: 4
Fast path variables span cache lines after change: 2

Suggested-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Wei Wang <weiwan@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Coco Li <lixiaoyan@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Coco Li 2023-11-29 07:27:54 +00:00 • committed by David S. Miller

parent aeb9ce058d

commit 18fd64d254

2 changed files with 77 additions and 15 deletions

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47

include/net/netns/ipv4.h

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45

net/core/net_namespace.c

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