Date: Sat, 15 Jun 1996 14:54:36 -0400 From: Garrett Wollman <wollman@lcs.mit.edu> To: Robert Sanders <rsanders@mindspring.com> Cc: lists-freebsd-bugs@matlock.mindspring.com Subject: Re: kern/1293: Fatal trap 12: page fault while in kernel mode (PPP/modems/cyclades?) Message-ID: <9606151854.AA22749@halloran-eldar.lcs.mit.edu> In-Reply-To: <knzq6452ya.fsf@xena.mindspring.com> References: <199606051432.RAA20913@katiska.clinet.fi> <knzq6452ya.fsf@xena.mindspring.com>
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<<On 15 Jun 1996 14:37:01 -0400, Robert Sanders <rsanders@mindspring.com> said: > This has never happened in months of user PPP. I'd just stick to > userland PPP, but it randomly loses packets and gives erratic > performance. How does one begin to debug a "fatal double fault"? It is almost invariably caused by a kernel stack overflow, which is in turn caused by too much stack allocation or recursion (often infinite recursion due to bugs) in the kernel. -GAWollman -- Garrett A. Wollman | Shashish is simple, it's discreet, it's brief. ... wollman@lcs.mit.edu | Shashish is the bonding of hearts in spite of distance. Opinions not those of| It is a bond more powerful than absence. We like people MIT, LCS, ANA, or NSA| who like Shashish. - Claude McKenzie + Florent Vollant
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