From owner-freebsd-current  Tue Jul 21 17:50:34 1998
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To: Kevin Day <toasty@home.dragondata.com>
cc: current@FreeBSD.ORG
Subject: Re: panic: page fault while in kernel mode - from gcc 
In-reply-to: Your message of "Tue, 21 Jul 1998 17:24:12 CDT."
             <199807212224.RAA09883@home.dragondata.com> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Tue, 21 Jul 1998 17:49:09 -0700
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>I was able to make gcc produce this twice - then it wouldn't do it again:
>
>page fault while in kernel mode
>
>A trace shows:
>
>_zalloci
>_get_pv_entry
>_pmap_insert_entry
>_pmap_enter
>_vm_fault
>_trap
>calltrap()
>--- trap 0xc, eip = 0xf01cd754, esp = 0xfaa9fe88, ebp = 0xfaa9fe88
>_get_ptbase
>_pmap_protect
>_vm_map_copy_entry
>_vmspace_fork
>_vm_fork
>_fork1
>_vfork
>_syscall
>_Xsyscall
>
>This mean anything to anyone?

   This seems to indicate that the new process's page directory either hasn't
been allocated yet or went away for some reason. Apparantly one of several
new bugs that John has left us with.

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project

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