The problem is just fixed on the tree. Thanks. The problem was come from my "TCP receive buffer size auto scaling" commit. https://marc.info/?l=openbsd-cvs&m=166781979228293&w=2
On Thu, 1 Dec 2022 13:05:25 +0100 Christian Weisgerber <na...@mips.inka.de> wrote: > Jeremie Courreges-Anglas: > >> > The pattern is that several ssh processes are spawned in parallel >> > that connect to different hosts--actually the amd64*.p package build >> > machines. I have observed this both from home a continent away, >> > and from amd64.p to amd64-*.p on the same network. >> >> I suspect this is a problem local to the ports machines network. >> Some SYN packets seem to be lost, as in they don't appear in tcpdump(8) >> on the target machine. > > Hmm. > The odd thing is that it only happens when several ssh's are spawned > at the same time, like earlier today with "scp amd64.p:file host:". > But this may be a red herring. > > Another potential pattern, now that I think about it, could be that > it only happens when the target host hasn't had any traffic for a > while, so the switch may have forgotten the MAC address. > > -- > Christian "naddy" Weisgerber na...@mips.inka.de >
