From owner-freebsd-hackers  Sat Aug 28 12:43:56 1999
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Date: Sat, 28 Aug 1999 14:41:55 -0500
From: Alan Cox <alc@cs.rice.edu>
To: Larry Lile <lile@stdio.com>
Cc: hackers@freebsd.org
Subject: Re: Panic in pmap_remove_pages on 4.0-current
Message-ID: <19990828144155.A13618@cs.rice.edu>
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This exact problem came up last month.  pmap_remove_pages is tripping
over a corrupted page table entry (pte).  Unfortunately, by the time the panic
occurs, pmap_remove_pages has overwritten the corrupted pte with zero.

Earlier this month, I added a KASSERT to detect this problem (and
panic) before the corrupted pte is overwritten.  This KASSERT seems 
to be missing from your kernel.  Could you turn on assertion checking
in your kernel configuration and/or update to a newer kernel.

Alan


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