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tcp: Namespace-ify sysctl_tcp_rmem and sysctl_tcp_wmem

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Note that when a new netns is created, it inherits its
sysctl_tcp_rmem and sysctl_tcp_wmem from initial netns.

This change is needed so that we can refine TCP rcvbuf autotuning,
to take RTT into consideration.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Wei Wang <weiwan@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2017-11-07 00:29:28 -08:00 • committed by David S. Miller
parent a3dcaf17ee
commit 356d1833b6
8 changed files with 47 additions and 43 deletions
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2
include/net/netns/ipv4.h
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@ -155,6 +155,8 @@ struct netns_ipv4 {
int sysctl_tcp_invalid_ratelimit;
int sysctl_tcp_pacing_ss_ratio;
int sysctl_tcp_pacing_ca_ratio;
int sysctl_tcp_wmem[3];
int sysctl_tcp_rmem[3];
struct inet_timewait_death_row tcp_death_row;
int sysctl_max_syn_backlog;
int sysctl_tcp_fastopen;