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Date:      Fri, 29 Oct 1999 11:51:05 +1000
From:      Peter Jeremy <jeremyp@gsmx07.alcatel.com.au>
To:        Matthew Dillon <dillon@apollo.backplane.com>
Cc:        freebsd-current@FreeBSD.ORG
Subject:   Re: odd NFS behaviour with DU 4.F client
Message-ID:  <99Oct29.114607est.40359@border.alcanet.com.au>
In-Reply-To: <199910290103.SAA13818@apollo.backplane.com>
References:  <14360.50663.727201.679421@grasshopper.cs.duke.edu> <199910282225.PAA12530@apollo.backplane.com> <14360.60247.329457.247327@grasshopper.cs.duke.edu> <199910290103.SAA13818@apollo.backplane.com>

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On 1999-Oct-29 11:03:20 +1000, Matthew Dillon wrote:
>  Unfortunately, we just don't see these sorts
>    of panics on Intel boxes all that much because IA32 allows misaligned
>    accesses.  This means there are almost certainly alignment bugs in the
>    code.

You can enable user-mode alignment traps on the IA32.  Check out
EFLAGS bit 18 and the AM bit in CR0 - unfortunately, it doesn't seem
to work for ring 0, 1, 2 so you can't find alignment problems in the
kernel.


Peter


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