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Date:      Tue, 29 Jun 1999 15:23:34 -0500 (EST)
From:      Alfred Perlstein <bright@rush.net>
To:        Kevin Van Maren <vanmaren@fast.cs.utah.edu>
Cc:        freebsd-smp@FreeBSD.ORG, tich@ma.ikos.com, vanmaren@cs.utah.edu
Subject:   Re: high-efficiency SMP locks - submission for review
Message-ID:  <Pine.BSF.3.96.990629152019.14320Y-100000@cygnus.rush.net>
In-Reply-To: <199906291908.NAA08028@fast.cs.utah.edu>

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On Tue, 29 Jun 1999, Kevin Van Maren wrote:

re: rep prefix on x86 string instructions...

> This wasn't always the case: I believe on the 8088, it was non-
> interruptable, however, they had to fix it to deal with crossing
> page boundaries on the i386.

early x86 (i think 8088) wouldn't properly save the state of 
the string instrucions during an interupt, just some useless
info i remember from "PC Intern"  A resume wouldn't continue
the op.

-Alfred



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