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Date: Tue, 14 Jan 1997 08:14:58 -0600 (CST)
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Subject: kern/2494: page faults
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>Number:         2494
>Category:       kern
>Synopsis:       constant page faults in kernel mode
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jan 14 06:20:06 PST 1997
>Last-Modified:
>Originator:     Nick Johnson
>Organization:
>Release:        FreeBSD 2.1-STABLE i386 (2.1.5-RELEASE)
>Environment:
	Pentium-100 machine, 32 megs of ram.  Typical FBSD 2.1.5 install.
	

>Description:

	System pukes upon itself regularly.  The debugger in the kernel 
indicates that the cause of death is a page fault while in kernel mode.  
This is almost always the error.  Further information indicates that the 
error is a result of a page-not-present.  Severity and frequency of the 
problem increase when external cache is turned on, and decreases slighly 
when it is disabled.  Severity and frequency also appears to increase if 
X-windows is run.

	Hardware has been thoroughly tested for memory controller faults 
and bad cache/simms with everything testing out fine.

	

>How-To-Repeat:

	Boot.

	

>Fix:

	Unknown at this time; some help can be found by disabling the 
external cache memory, but the problem still occurs.	

	

>Audit-Trail:
>Unformatted:
<Synopsis of the problem (one line)>
<[ non-critical | serious | critical ] (one line)>
<[ low | medium | high ] (one line)>
<Problem category (as listed above)>
<[ sw-bug | doc-bug | change-request | support ] (one line)>