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Message-Id: <1187586193.5408.1.camel@laptopd505.fenrus.org>
Date: Sun, 19 Aug 2007 22:03:13 -0700
From: Arjan van de Ven <arjan@...radead.org>
To: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc: Andi Kleen <ak@...e.de>, patches@...-64.org,
Jeremy Fitzhardinge <jeremy@...p.org>,
Zachary Amsden <zach@...are.com>,
Rusty Russell <rusty@...tcorp.com.au>,
linux-kernel@...r.kernel.org,
"S. P. Prasanna" <prasanna@...ibm.com>,
Chris Wright <chrisw@...s-sol.org>
Subject: Re: Non atomic unaligned writes
> > > Are misaligned/cross-cache-line updates atomic?
> >
> > In theory yes, in practice there can be errata of course.
Afaik the theory is "Platform specific; most x86 will be in practice";
it's up to the system vendor and chipset vendor.
The practice is "mixed ball, slow as h*ck anyway, just never ever do it"
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