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tcp/lro: Make # of LRO entries tunable

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Reviewed by:	hps, gallatin
Obtained from:	rrs, gallatin
MFC after:	2 weeks
Sponsored by:	Netflix (rrs, gallatin), Microsoft (sephe)
Differential Revision:	https://reviews.freebsd.org/D7499
This commit is contained in:
Sepherosa Ziehau 2016-08-16 06:40:27 +00:00
parent 5968c00154
commit 8452c1b345
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=304202
1 changed files with 11 additions and 1 deletions
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12
sys/netinet/tcp_lro.c
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@ -42,6 +42,7 @@ __FBSDID("$FreeBSD$");
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_var.h>
@ -55,6 +56,7 @@ __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>
@ -71,6 +73,14 @@ static void tcp_lro_rx_done(struct lro_ctrl *lc);
static int tcp_lro_rx2(struct lro_ctrl *lc, struct mbuf *m,
uint32_t csum, int use_hash);
SYSCTL_NODE(_net_inet_tcp, OID_AUTO, lro, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
"TCP LRO");
static unsigned tcp_lro_entries = TCP_LRO_ENTRIES;
SYSCTL_UINT(_net_inet_tcp_lro, OID_AUTO, entries,
CTLFLAG_RDTUN | CTLFLAG_MPSAFE, &tcp_lro_entries, 0,
"default number of LRO entries");
static __inline void
tcp_lro_active_insert(struct lro_ctrl *lc, struct lro_head *bucket,
struct lro_entry *le)
@ -91,7 +101,7 @@ tcp_lro_active_remove(struct lro_entry *le)
int
tcp_lro_init(struct lro_ctrl *lc)
{
return (tcp_lro_init_args(lc, NULL, TCP_LRO_ENTRIES, 0));
return (tcp_lro_init_args(lc, NULL, tcp_lro_entries, 0));
}
int