cvs commit: src/sys/netinet tcp_output.c

[Rui Paulo]

At Fri, 11 May 2007 21:59:13 +0200,
Andre Oppermann wrote:
> 
> Julian Elischer wrote:
> > Rui Paulo wrote:
> >> At Fri, 11 May 2007 02:12:53 +0200,
> >> Andre Oppermann wrote:
> >>> Rui Paulo wrote:
> >>>> At Fri, 11 May 2007 01:17:09 +0200,
> >>>> Andre Oppermann wrote:
> >>>>> Andre Oppermann wrote:
> >>>>>> andre       2007-05-10 23:11:29 UTC
> >>>>>>
> >>>>>>   FreeBSD src repository
> >>>>>>
> >>>>>>   Modified files:
> >>>>>>     sys/netinet          tcp_output.c   Log:
> >>>>>>   Fix an incorrect replace of a timer reference made during the
> >>>>>> TCP timer
> >>>>>>   rewrite in rev. 1.132.  This unmasked yet another bug that
> >>>>>> causes certain
> >>>>>>   connections to get indefinately stuck in LAST_ACK state.
> >>>>>>     Revision  Changes    Path
> >>>>>>   1.135     +1 -1      src/sys/netinet/tcp_output.c
> >>>>> Pointy hat to:    andre
> >>>>>
> >>>>> Fix for the other masked bug(s) is in the works.
> >>>> Does this fix the bug related to rfc1323?
> >>>> If not, is it in the works?
> >>> No, this doesn't fix it.  Which bug about rfc1323 are referring to?
> >>
> >> I sent you two tcpdump's regarding to an HTTP connection that got
> >> stuck after a few bytes were transfered. One with RFC1323 enable and
> >> another one without it.
> >> Disabling RFC1323 sysctl made the connection work flawlessly.
> >> The host I'm communicating with is on the same network segment.
> >>
> >> Did you recieve the dumps?
> > This may be one of the ones I sent to you andre.. In the one we saw,
> > the scaling is done wrong if the other end wants to scale by 9 and
> > set a window size of 1.
> > FreeBSD thinks it has a window size of 1 instead of 1<<9.
> > I thought this was fixed in -current but it has the same symptoms as
> > what we see in 6.
> 
> Julian, Rui,
> 
> what is the output of 'sysctl net.inet.tcp.minmss' on the affected
> machines (those that do not enable scaling)?

net.inet.tcp.minmss: 216

The other machine is Linux and has a limited /proc:
# pwd
/proc/net
# ls
arp              ip_mr_vif        raw              time
atm              ip_tables_names  route            udp
dev              netlink          rt_cache         unix
dev_mcast        netstat          rt_cache_stat    voice
firewall_start   packet           snmp             wireless
igmp             port_trap        sockstat
ip_conntrack     pppoe            softnet_stat
ip_mr_cache      psched           tcp

--
Rui Paulo