diff options
| author | silby <silby@FreeBSD.org> | 2001-06-23 03:21:46 +0000 |
|---|---|---|
| committer | silby <silby@FreeBSD.org> | 2001-06-23 03:21:46 +0000 |
| commit | f41767543e91978acb89276274f32fe6566ef613 (patch) | |
| tree | 8d364d91b3427e5e39be4b2952a487aee0ba2a8c /sys/netinet/tcp_timer.c | |
| parent | cb05fc6c2a8bdf494106b7b9b73e2a36ef37f0df (diff) | |
| download | FreeBSD-src-f41767543e91978acb89276274f32fe6566ef613.zip FreeBSD-src-f41767543e91978acb89276274f32fe6566ef613.tar.gz | |
Eliminate the allocation of a tcp template structure for each
connection. The information contained in a tcptemp can be
reconstructed from a tcpcb when needed.
Previously, tcp templates required the allocation of one
mbuf per connection. On large systems, this change should
free up a large number of mbufs.
Reviewed by: bmilekic, jlemon, ru
MFC after: 2 weeks
Diffstat (limited to 'sys/netinet/tcp_timer.c')
| -rw-r--r-- | sys/netinet/tcp_timer.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sys/netinet/tcp_timer.c b/sys/netinet/tcp_timer.c index a035989..488c293 100644 --- a/sys/netinet/tcp_timer.c +++ b/sys/netinet/tcp_timer.c @@ -41,6 +41,7 @@ #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> +#include <sys/mbuf.h> #include <sys/sysctl.h> #include <sys/socket.h> #include <sys/socketvar.h> @@ -222,6 +223,7 @@ tcp_timer_keep(xtp) void *xtp; { struct tcpcb *tp = xtp; + struct tcptemp *t_template; int s; #ifdef TCPDEBUG int ostate; @@ -259,9 +261,13 @@ tcp_timer_keep(xtp) * correspondent TCP to respond. */ tcpstat.tcps_keepprobe++; - tcp_respond(tp, tp->t_template->tt_ipgen, - &tp->t_template->tt_t, (struct mbuf *)NULL, - tp->rcv_nxt, tp->snd_una - 1, 0); + t_template = tcp_maketemplate(tp); + if (t_template) { + tcp_respond(tp, t_template->tt_ipgen, + &t_template->tt_t, (struct mbuf *)NULL, + tp->rcv_nxt, tp->snd_una - 1, 0); + (void) m_free(dtom(t_template)); + } callout_reset(tp->tt_keep, tcp_keepintvl, tcp_timer_keep, tp); } else callout_reset(tp->tt_keep, tcp_keepidle, tcp_timer_keep, tp); |
