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Date: Mon, 20 Oct 2003 12:15:01 -0400
To: Jan Grant <Jan.Grant@bristol.ac.uk>, stable@freebsd.org
From: Mike Tancsa <mike@sentex.net>
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Subject: Re: Expert input required: P4 odd signals, no apparent memory
 fault,  DISABLE_PSE?
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How recent is your copy of RELENG_4 ?  The PSE disable code was committed 
to the tree already as well as a fix so it would work with APM on the 
17th.  By default it is disabled.  If you look at your dmesg.boot you 
should see
Warning: Pentium 4 CPU: PSE disabled

         ---Mike

At 11:38 AM 20/10/2003, Jan Grant wrote:
>I'm tracking -STABLE on a 1.8GHz P4 with 512MB of memory. Roughly since
>the PAE changes were MFCed, I've been seeing memory-corruption-related
>errors under specific circumstances: for example, a run of
>         portsdb -fUu
>can be guaranteed to generate SIGBUS, SIGILL and SIGSEGVs in a handful
>of sh, sed, etc. processes.