Date: Fri, 5 Dec 2008 22:10:10 +0530 From: "Joseph Koshy" <joseph.koshy@gmail.com> To: "NAKAJI Hiroyuki" <nakaji@jp.freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: Fatal trap 12: page fault while in kernel mode Message-ID: <84dead720812050840j28c95014wf76095c3d6def985@mail.gmail.com> In-Reply-To: <87zljb8nw6.fsf@roddy.4407.kankyo-u.ac.jp> References: <87zljb8nw6.fsf@roddy.4407.kankyo-u.ac.jp>
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> Fatal trap 12: page fault while in kernel mode > cpuid = 0; apic id = 00 > fault virtual address = 0x0 > fault code = supervisor read, page not present > instruction pointer = 0x20:0xc0a57285 > Why this occurs and what do I have to check? The trap is being caused by a null pointer access. You may want to take a full dump and use kgdb(1) to investigate the matter: ddb> call doadump ddb> reset and after the reboot finishes, # kgdb /boot/kernel/kernel /var/crash/vmcore.N where "vmcore.N" is the name of the dump file saved by savecore(8). Koshy
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