Hi, I've had a couple of machines crashing recently, without leaving much of a trace as to why they are doing so. The first time either of the crashed I got the following messages in the syslog: kernel: BUG: soft lockup - CPU#0 stuck for 10s! [pluto:11024] kernel: kernel: Pid: 11024, comm: pluto kernel: EIP: 0060:[<c060fede>] CPU: 0 kernel: EIP is at _spin_lock+0x5/0xf kernel: EFLAGS: 00200286 Not tainted (2.6.18-128.1.1.el5 #1) kernel: EAX: c6385dac EBX: c6385d80 ECX: c6385dac EDX: 00000100 kernel: ESI: 00000000 EDI: 00000000 EBP: c6385d80 DS: 007b ES: 007b kernel: CR0: 8005003b CR2: b2b74fdc CR3: 32fcb000 CR4: 000006d0 kernel: [<c05ad8f8>] release_sock+0x59/0x91 kernel: [<c05ea810>] udp_sendmsg+0x44e/0x514 kernel: [<c05efd4c>] inet_sendmsg+0x35/0x3f kernel: [<c05ab25c>] sock_sendmsg+0xce/0xe8 I'm not sure if this is connected to the other crashes as there have been absolutely no indicative messages in the logs, but I do know that one of the network interfaces stops responding altogether. I haven't managed to get into the machines after the crash so I can't perform any more diagnosis until it happens again. Do these error messages ring any bells for anyone? -- Regards, Oliver Hookins Anchor Systems -- To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html