schrieb Jeremy Chadwick am 24.10.2012 20:12 (localtime): > ... > root@icarus:/root # ping -D -s 4068 127.0.0.1 > PING 127.0.0.1 (127.0.0.1): 4068 data bytes > 4076 bytes from 127.0.0.1: icmp_seq=0 ttl=64 time=0.030 ms > 4076 bytes from 127.0.0.1: icmp_seq=1 ttl=64 time=0.032 ms > 4076 bytes from 127.0.0.1: icmp_seq=2 ttl=64 time=0.024 ms > ^C > --- 127.0.0.1 ping statistics --- > 3 packets transmitted, 3 packets received, 0.0% packet loss > round-trip min/avg/max/stddev = 0.024/0.029/0.032/0.003 ms > > I also ran tcpdump for this too; no anomalies -- all 3 packets showed up > correctly (decoded correctly). My uname -a is below, with csup run > about 20 minutes before the kernel build date. > > FreeBSD icarus.home.lan 9.1-PRERELEASE FreeBSD 9.1-PRERELEASE #0: Sun Oct 21 > 05:24:09 PDT 2012 > r...@icarus.home.lan:/usr/obj/usr/src/sys/X7SBA_RELENG_9_amd64 amd64 > > This is on bare-metal hardware, BTW. I mention that because I've seen > some of your other threads talking about NIC driver ordeals under VMs (I > think).
Oh, I thought it's not specific to my system because I remembered this issue well on a completely different HW; real HW in that case. A quick test showed that the big-ping to localhost works on all my other machines... Should have checked that before, sorry. I have zero_copy_sockets in all my kernels, so I think that can't be the cause. But I don't have another machine where real nics have MTU > 1500. I'll try to find out why this only affects one machine here at the moment, but tonight's time to have dinner->sleep. Thanks a lot! -Harry
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