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Date:      Fri, 12 Oct 2001 14:50:15 -0400 (EDT)
From:      Zhihui Zhang <zzhang@cs.binghamton.edu>
To:        freebsd-hackers@freebsd.org
Subject:   Page fault and bad memory
Message-ID:  <Pine.SOL.4.21.0110121439400.17004-100000@opal>

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I am writing a program that stresses memory a lot. The program accepts a
parameter to indicate how long it runs.  For several big values, the
program runs OK.  But when I give a even bigger one, the system panics at
generic_bcopy().  I am wondering whether this has something to do with bad
memory chip or some other hardware problem.  

I do not believe that the program logic will change when given a bigger
input.  Although I am still studying the code, the chances of a software
bug is small. How can I tell if this is due to bad memory?

The system is running 4.3-Release and the program runs for about 2 hours.
It is a kernel module doing a lot of I/O.

Thanks for you advice.


-Zhihui


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