Date: Wed, 5 Jun 1996 17:32:35 +0300 (EET DST) From: Heikki Suonsivu <hsu@clinet.fi> To: FreeBSD-gnats-submit@freebsd.org Subject: kern/1293: Fatal trap 12: page fault while in kernel mode (PPP/modems/cyclades?) Message-ID: <199606051432.RAA20913@katiska.clinet.fi> Resent-Message-ID: <199606051440.HAA04883@freefall.freebsd.org>
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>Number: 1293 >Category: kern >Synopsis: Fatal trap 12: page fault while in kernel mode (PPP/modems/cyclades?) >Confidential: no >Severity: serious >Priority: high >Responsible: freebsd-bugs >State: open >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Jun 5 07:40:02 PDT 1996 >Last-Modified: >Originator: Heikki Suonsivu >Organization: Clinet, Espoo, Finland >Release: FreeBSD 2.2-CURRENT i386 >Environment: We have 4 modem servers built on 486 and pentium machines. They have several different motherboard configurations, common things are that they have ide drives and cyclades serial boards (32 or 16 ports each). They have been running several versions of -stable and -current. The problem has been there for long time. Most modems are mostly V34, some V32. We have identical configurations used as leased line asynchronous routers, and have no problems at all (they do never seem to crash). Dialups are using both kernel ppp and rlogin connections to other machines (these are dedicated, users cannot login to the machines themselves). The only programs running in these machines are pppd, rlogin, getty (patched agetty, actually) and gated. >Description: The machine locks up with console containing either Fatal trap 12: page fault while in kernel mode Fatal trap 12: page fault while in kernel mode Fatal trap 12: page fault while in kernel mode ... or some fatal trap message and a double panic message. It seems that about 1 crash out of 4 leads to a deadlock like one of these. Other panics are reboots without trails, the systems do not seem to generate dumps. If it is a hardware problem, it would have to be a general design problem in one of the components (cyclades is the only "uncommon" piece of hardware). But I doubt it, as the same configuration works fine with leased lines, and the machines are from varying ages and configurations. It seems that this has something to do with dialup modems. >How-To-Repeat: I do not know. I do not seem to ever get crash dumps. >Fix: >Audit-Trail: >Unformatted:
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