svn commit: r305189 - stable/10/sys/netinet
Sepherosa Ziehau
sephe at FreeBSD.org
Thu Sep 1 08:01:14 UTC 2016
Author: sephe
Date: Thu Sep 1 08:01:13 2016
New Revision: 305189
URL: https://svnweb.freebsd.org/changeset/base/305189
Log:
MFC 304202
tcp/lro: Make # of LRO entries tunable
Reviewed by: hps, gallatin
Obtained from: rrs, gallatin
Sponsored by: Netflix (rrs, gallatin), Microsoft (sephe)
Differential Revision: https://reviews.freebsd.org/D7499
Modified:
stable/10/sys/netinet/tcp_lro.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/netinet/tcp_lro.c
==============================================================================
--- stable/10/sys/netinet/tcp_lro.c Thu Sep 1 07:53:59 2016 (r305188)
+++ stable/10/sys/netinet/tcp_lro.c Thu Sep 1 08:01:13 2016 (r305189)
@@ -40,6 +40,7 @@ __FBSDID("$FreeBSD$");
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/socket.h>
+#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_var.h>
@@ -53,6 +54,7 @@ __FBSDID("$FreeBSD$");
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_lro.h>
+#include <netinet/tcp_var.h>
#include <netinet6/ip6_var.h>
@@ -67,6 +69,14 @@ __FBSDID("$FreeBSD$");
#define TCP_LRO_INVALID_CSUM 0x0000
#endif
+SYSCTL_NODE(_net_inet_tcp, OID_AUTO, lro, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
+ "TCP LRO");
+
+static unsigned tcp_lro_entries = LRO_ENTRIES;
+SYSCTL_UINT(_net_inet_tcp_lro, OID_AUTO, entries,
+ CTLFLAG_RDTUN | CTLFLAG_MPSAFE, &tcp_lro_entries, 0,
+ "default number of LRO entries");
+
int
tcp_lro_init(struct lro_ctrl *lc)
{
@@ -81,7 +91,7 @@ tcp_lro_init(struct lro_ctrl *lc)
SLIST_INIT(&lc->lro_active);
error = 0;
- for (i = 0; i < LRO_ENTRIES; i++) {
+ for (i = 0; i < tcp_lro_entries; i++) {
le = (struct lro_entry *)malloc(sizeof(*le), M_DEVBUF,
M_NOWAIT | M_ZERO);
if (le == NULL) {
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