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Date:      Mon, 12 Nov 2001 19:42:31 -0500 (EST)
From:      Robert Watson <rwatson@FreeBSD.org>
To:        John Baldwin <jhb@FreeBSD.org>
Cc:        freebsd-arch@FreeBSD.org, Matthew Dillon <dillon@apollo.backplane.com>, Terry Lambert <tlambert2@mindspring.com>
Subject:   Re: cur{thread/proc}, or not.
Message-ID:  <Pine.NEB.3.96L.1011112194158.36592D-100000@fledge.watson.org>
In-Reply-To: <XFMail.011112163814.jhb@FreeBSD.org>

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On Mon, 12 Nov 2001, John Baldwin wrote:

> > My recollection is that there was some concern about the size of the unit
> > of atomic operation across platforms.  I may not recall correctly, but my
> > understanding was that some platforms substantially limited the potential
> > size of the target of the atomic operation to less than the normal
> > arithmetic unit size.  Again, subject to the fallibility of my
> > recollection, the maximum unit for atomic operations on Sparc64 was
> > 24-bit, despite the native register size being 64-bit. 
> 
> No, that was on sparc32, not sparc64.  All of our current architectures
> would be fine with it. 

Oh, good.  I couldn't remember (hence some waffling) -- I have no problem
with this.

Robert N M Watson             FreeBSD Core Team, TrustedBSD Project
robert@fledge.watson.org      NAI Labs, Safeport Network Services



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