diff options
| -rw-r--r-- | sys/netinet/tcp_usrreq.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/sys/netinet/tcp_usrreq.c b/sys/netinet/tcp_usrreq.c index c3676bcceaa..b7018253a65 100644 --- a/sys/netinet/tcp_usrreq.c +++ b/sys/netinet/tcp_usrreq.c @@ -1,4 +1,4 @@ -/* $OpenBSD: tcp_usrreq.c,v 1.103 2010/09/24 02:59:45 claudio Exp $ */ +/* $OpenBSD: tcp_usrreq.c,v 1.104 2010/09/29 06:32:47 claudio Exp $ */ /* $NetBSD: tcp_usrreq.c,v 1.20 1996/02/13 23:44:16 christos Exp $ */ /* @@ -966,7 +966,8 @@ tcp_sysctl(name, namelen, oldp, oldlenp, newp, newlen) * the limit. The buffer will scale with the congestion window, if the * the receiver stops acking data the window will shrink and therefor * the buffer size will shrink as well. - * In low memory situation shrink + * In low memory situation try to shrink the buffer to the initial size + * disabling the send buffer scaling as long as the situation persists. */ void tcp_update_sndspace(struct tcpcb *tp) @@ -992,6 +993,12 @@ tcp_update_sndspace(struct tcpcb *tp) sbreserve(&so->so_snd, nmax); } +/* + * Scale the recv buffer by looking at how much data was transfered in + * on approximated RTT. If more then a big part of the recv buffer was + * transfered during that time we increase the buffer by a constant. + * In low memory situation try to shrink the buffer to the initial size. + */ void tcp_update_rcvspace(struct tcpcb *tp) { |