On Wed, Aug 25, 2004 at 02:14:58PM -0700, Nivedita Singhvi wrote: > Christoph Hellwig wrote: > >Could it be possible OpenBSD doesn't properly deal with the tcp window > >scaling changes in 2.6.8? (http://lwn.net/Articles/92727/) > > Unless there is present in the path one of those broken > routers (mangling the window scale option), it's likely > something else. Also, nntp traffic tends to be small and > unaffected by window sizes. Any way to tell if that is so? > > Any chance you could make the tcpdumps available, if > this has not already been resolved?
Has been temporarily relieved by changing tcp_default_window_size. (Indicated in updates to the debian bug report) TCP dumps are available at http://pakrat.is.an.evilplan.org:5198/267342/ Someone with access to the machine works at IBM. He will drop you a note if you wish to sametime PD instructions. Can also recreate on a non-SMP system if so desired. > > We had a problem with sshd and other apps hanging due > to glibc changes and unsafe signal handling in daemons, > but this seems like something else.. > > thanks, > Nivedita > > > >>I have noticed strangeness with the 2.6.8 kernel on both 686-smp > >>and k7. > >>1) rsync from 2.6.8 to a 2.6.7 host hangs. > >>2) ssh from 2.6.8 to a 2.6.7 host hangs. > >>3) nntp from 2.6.8 hangs for 52 seconds before proceeding. > >>4) ssh from Openbsd to 2.6.8 hangs after SSH2_MSG_KEX_DH_GEX_REQUEST > >> > >>In 1-2 the network topology is as follows > >>2.6.8host <-ethernet-> OpenBSD <-openvpn-> OpenBSD <-ethernet-> 2.6.7host > >>In 3 the network topology is as follows > >>2.6.8host <-ethernet-> OpenBSD <-openvpn-> OpenBSD <-internet-> > >>nntp-server > >>In 4 the network topology is as follows > >>2.6.8host <-ethernet-> OpenBSD > > -- K.D.
