Two boxes both with FC4. I start an rsync of about 11GB between them, and hilarity ensues. The client process hangs and needs to be CTRL-C'ed. The server locks up completely. Nothing returns from the console after entering a username and hitting return. It does reply to ping though. Client - 2.6.12-1.1398_FC4 i386 Server - 2.6.12-1.1447_FC4smp x86_64 I need to power cycle the server and here is what from 'sar' I found when it came back : proc/s = 100.00 cswch/s = 0.00 %iowait = 100.00 intr/s = 100 And so on.. There are no kernel messages either on console, nor in messages. I left top running on the server and this was the last screen dump : top - 16:27:01 up 16 min, 1 user, load average: 0.38, 0.10, 0.06 Tasks: 58 total, 1 running, 57 sleeping, 0 stopped, 0 zombie Cpu(s): 3.0% us, 18.8% sy, 0.0% ni, 35.9% id, 41.6% wa, 0.0% hi, 0.7% si Mem: 1023568k total, 508976k used, 514592k free, 40280k buffers Swap: 0k total, 0k used, 0k free, 99340k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2329 root 16 0 282m 266m 744 D 37.3 26.6 0:01.42 rsync 2253 root 15 0 38524 2876 2096 S 6.3 0.3 0:01.62 sshd Nothing crazy going on there and the cursor is still blinking. The rsync and SSH running on the client are stuck on an unfinished "select()" call. tethereal shows no traffic between the two (ohh by the way how do you get ethereal to show a more tcpdump style output so I can actually see the ports things are coming from / going to?). So, what do you recommend ? Network kernel debug or oprofile perhaps?
