Date: Sat, 22 Mar 2008 16:47:19 GMT From: Andre Oppermann <andre@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 138292 for review Message-ID: <200803221647.m2MGlJRA053136@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=138292 Change 138292 by andre@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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