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authorDust Li <dust.li@linux.alibaba.com>2022-03-01 17:43:58 +0800
committerDavid S. Miller <davem@davemloft.net>2022-03-01 14:25:12 +0000
commit12bbb0d163a90d81a2677cf7808d364697290207 (patch)
treecc1b0752c04cca5ee363f20aba99b404ef6e3161 /net/smc
parentdcd2cf5f2fc0d4d37aa5400b308d401a150c38b6 (diff)
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net/smc: add sysctl for autocorking
This add a new sysctl: net.smc.autocorking_size We can dynamically change the behaviour of autocorking by change the value of autocorking_size. Setting to 0 disables autocorking in SMC Signed-off-by: Dust Li <dust.li@linux.alibaba.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc')
-rw-r--r--net/smc/smc_sysctl.c10
-rw-r--r--net/smc/smc_tx.c2
2 files changed, 11 insertions, 1 deletions
diff --git a/net/smc/smc_sysctl.c b/net/smc/smc_sysctl.c
index 8a3a8e145976..3b59876aaac9 100644
--- a/net/smc/smc_sysctl.c
+++ b/net/smc/smc_sysctl.c
@@ -14,9 +14,17 @@
#include <linux/sysctl.h>
#include <net/net_namespace.h>
+#include "smc.h"
#include "smc_sysctl.h"
static struct ctl_table smc_table[] = {
+ {
+ .procname = "autocorking_size",
+ .data = &init_net.smc.sysctl_autocorking_size,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_douintvec,
+ },
{ }
};
@@ -40,6 +48,8 @@ static __net_init int smc_sysctl_init_net(struct net *net)
if (!net->smc.smc_hdr)
goto err_reg;
+ net->smc.sysctl_autocorking_size = SMC_AUTOCORKING_DEFAULT_SIZE;
+
return 0;
err_reg:
diff --git a/net/smc/smc_tx.c b/net/smc/smc_tx.c
index 062c6b1535e3..257dc0d0aeb1 100644
--- a/net/smc/smc_tx.c
+++ b/net/smc/smc_tx.c
@@ -147,7 +147,7 @@ static bool smc_should_autocork(struct smc_sock *smc)
struct smc_connection *conn = &smc->conn;
int corking_size;
- corking_size = min(SMC_AUTOCORKING_DEFAULT_SIZE,
+ corking_size = min(sock_net(&smc->sk)->smc.sysctl_autocorking_size,
conn->sndbuf_desc->len >> 1);
if (atomic_read(&conn->cdc_pend_tx_wr) == 0 ||