From owner-freebsd-questions Wed Dec 30 17:39:35 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id RAA00819 for freebsd-questions-outgoing; Wed, 30 Dec 1998 17:39:35 -0800 (PST) (envelope-from owner-freebsd-questions@FreeBSD.ORG) Received: from athena.veritas.com (athena.veritas.com [192.203.46.191]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id RAA00812 for ; Wed, 30 Dec 1998 17:39:32 -0800 (PST) (envelope-from jones@veritas.com) Received: from megami.veritas.com (megami.veritas.com [192.203.46.101]) by athena.veritas.com (8.9.1a/8.9.1) with SMTP id RAA14438 for ; Wed, 30 Dec 1998 17:39:13 -0800 (PST) Received: by megami.veritas.com (Smail3.1.29.0 #7) id m0zvX4z-0000gqC; Wed, 30 Dec 98 17:39 PST Message-Id: From: jones@veritas.com (Alan Jones) Subject: hung system To: freebsd-questions@FreeBSD.ORG Date: Wed, 30 Dec 1998 17:39:12 -0800 (PST) X-Mailer: ELM [version 2.4 PL23] Content-Type: text Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Hello, I've done kernel development on a variety of Unix systems. What I have appears to be a hung system. Same symtom on 2.2.7 & 2.2.8. I've got kernel ppp configured (user-level would not work for me) on a USR03030 Sportster X2 mumble. It is a 333 Pentium from Micron. Everything works until I stress the modem, for example, by ftp'ing a large file. I've eliminated X software by reproducing it on the text console. All things appear to hang, though I don't have a network to check it for life over the net. What I would like to do is interupt the system and get a thread list or stack from the thread the CPU is on. UnixWare has a kernel debugger that you can use directly on the console and an interupt keyboard sequence. I've put in the options DDB and BREAK_TO_ DEBUGGER, however, p. 255 of "The Complete FreeBSD" indicates that BREAK_TO_DEBUGGER only works if you have the console redirected to a serial port. I don't happen to have a VT100 handy and configuring my Pilot to act as one is a lot of work just to run the debugger. Any suggestions? If there is a better way for me to submit this problem, please let me know. Alan To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message