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Commit 23a7102a authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

tcp: Namespace-ify sysctl_tcp_pacing_ss_ratio 



Also remove an obsolete comment about TCP pacing.

Signed-off-by: default avatarEric Dumazet <edumazet@google.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 4170ba6b

include/net/netns/ipv4.h

+1 −0
Original line number Diff line number Diff line
@@ -152,6 +152,7 @@ struct netns_ipv4 { 
	int sysctl_tcp_min_rtt_wlen;

	int sysctl_tcp_autocorking;

	int sysctl_tcp_invalid_ratelimit;

	int sysctl_tcp_pacing_ss_ratio;

	struct inet_timewait_death_row tcp_death_row;

	int sysctl_max_syn_backlog;

	int sysctl_tcp_fastopen;

include/net/tcp.h

+0 −1
Original line number Diff line number Diff line
@@ -250,7 +250,6 @@ extern int sysctl_tcp_rmem[3]; 


#define TCP_RACK_LOSS_DETECTION  0x1 /* Use RACK to detect losses */



extern int sysctl_tcp_pacing_ss_ratio;

extern int sysctl_tcp_pacing_ca_ratio;



extern atomic_long_t tcp_memory_allocated;

net/ipv4/sysctl_net_ipv4.c

+9 −9
Original line number Diff line number Diff line
@@ -492,15 +492,6 @@ static struct ctl_table ipv4_table[] = { 
		.mode		= 0644,

		.proc_handler   = proc_allowed_congestion_control,

	},

	{

		.procname	= "tcp_pacing_ss_ratio",

		.data		= &sysctl_tcp_pacing_ss_ratio,

		.maxlen		= sizeof(int),

		.mode		= 0644,

		.proc_handler	= proc_dointvec_minmax,

		.extra1		= &zero,

		.extra2		= &thousand,

	},

	{

		.procname	= "tcp_pacing_ca_ratio",

		.data		= &sysctl_tcp_pacing_ca_ratio,
@@ -1145,6 +1136,15 @@ static struct ctl_table ipv4_net_table[] = { 
		.mode		= 0644,

		.proc_handler	= proc_dointvec_ms_jiffies,

	},

	{

		.procname	= "tcp_pacing_ss_ratio",

		.data		= &init_net.ipv4.sysctl_tcp_pacing_ss_ratio,

		.maxlen		= sizeof(int),

		.mode		= 0644,

		.proc_handler	= proc_dointvec_minmax,

		.extra1		= &zero,

		.extra2		= &thousand,

	},

	{ }

};

net/ipv4/tcp_input.c

+1 −8
Original line number Diff line number Diff line
@@ -767,13 +767,6 @@ static void tcp_rtt_estimator(struct sock *sk, long mrtt_us) 
	tp->srtt_us = max(1U, srtt);

}



/* Set the sk_pacing_rate to allow proper sizing of TSO packets.

 * Note: TCP stack does not yet implement pacing.

 * FQ packet scheduler can be used to implement cheap but effective

 * TCP pacing, to smooth the burst on large writes when packets

 * in flight is significantly lower than cwnd (or rwin)

 */

int sysctl_tcp_pacing_ss_ratio __read_mostly = 200;

int sysctl_tcp_pacing_ca_ratio __read_mostly = 120;



static void tcp_update_pacing_rate(struct sock *sk)
@@ -793,7 +786,7 @@ static void tcp_update_pacing_rate(struct sock *sk) 
	 *	 end of slow start and should slow down.

	 */

	if (tp->snd_cwnd < tp->snd_ssthresh / 2)

		rate *= sysctl_tcp_pacing_ss_ratio;

		rate *= sock_net(sk)->ipv4.sysctl_tcp_pacing_ss_ratio;

	else

		rate *= sysctl_tcp_pacing_ca_ratio;

net/ipv4/tcp_ipv4.c

+1 −0
Original line number Diff line number Diff line
@@ -2507,6 +2507,7 @@ static int __net_init tcp_sk_init(struct net *net) 
	net->ipv4.sysctl_tcp_min_rtt_wlen = 300;

	net->ipv4.sysctl_tcp_autocorking = 1;

	net->ipv4.sysctl_tcp_invalid_ratelimit = HZ/2;

	net->ipv4.sysctl_tcp_pacing_ss_ratio = 200;



	net->ipv4.sysctl_tcp_fastopen = TFO_CLIENT_ENABLE;

	spin_lock_init(&net->ipv4.tcp_fastopen_ctx_lock);