PERFORCE change 138292 for review
Andre Oppermann
andre at FreeBSD.org
Sat Mar 22 16:47:20 UTC 2008
http://perforce.freebsd.org/chv.cgi?CH=138292
Change 138292 by andre at andre_flirtbox on 2008/03/22 16:47:08
Add net.inet.tcp.reass.queue_timeout sysctl to activate timeout
based reassembly queue flushing and to specify the multiple based
on the current retransmit timeout.
Affected files ...
.. //depot/projects/tcp_reass/netinet/tcp_reass.c#20 edit
Differences ...
==== //depot/projects/tcp_reass/netinet/tcp_reass.c#20 (text+ko) ====
@@ -129,6 +129,11 @@
&tcp_reass_mcnt, 0,
"Global gross memory size of all mbufs currently in Reassembly Queue");
+static int tcp_reass_qtimo = 0;
+SYSCTL_INT(_net_inet_tcp_reass, OID_AUTO, queue_timeout, CTLFLAG_RW,
+ &tcp_reass_qtimo, 0,
+ "Reassembly Queue Timeout in multiples of the Retransmission Timeout");
+
static void tcp_reass_merge(struct tcpcb *, struct trq *, struct trq *);
uma_zone_t tcp_reass_zone;
@@ -526,11 +531,13 @@
("%s: first element queue not empty", __func__));
TAILQ_INSERT_HEAD(&tp->t_trq, tqen, trq_q);
/*
- * Flush the reassembly queue after four times the
+ * Flush the reassembly queue after x times the
* current retransmit interval measured from the
* arrival time of the first segment.
*/
- tcp_timer_activate(tp, TT_REASS, tp->t_rxtcur * 4);
+ if (tcp_reass_qtimo)
+ tcp_timer_activate(tp, TT_REASS,
+ tp->t_rxtcur * tcp_reass_qtimo);
}
LIST_INSERT_HEAD(&tp->t_trq_sack, tqen, trq_s);
@@ -579,8 +586,9 @@
* the sequence space and if queue is not empty. Otherwise
* deactivate it.
*/
- if (!TAILQ_EMPTY(&tp->t_trq))
- tcp_timer_activate(tp, TT_REASS, tp->t_rxtcur * 4);
+ if (tcp_reass_qtimo && !TAILQ_EMPTY(&tp->t_trq))
+ tcp_timer_activate(tp, TT_REASS,
+ tp->t_rxtcur * tcp_reass_qtimo);
else
tcp_timer_activate(tp, TT_REASS, 0);
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