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From: John Baldwin <jhb@freebsd.org>
To: Christoph Hoffmann <christoph_hoffmann@me.com>
Date: Thu, 18 Aug 2011 18:08:55 -0400
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Cc: freebsd-current@freebsd.org
Subject: Re: gptzfsboot error  using HP Smart Array P410i Controller
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On Thursday, August 18, 2011 1:49:18 pm Christoph Hoffmann wrote:
> John, 
> 
> Unfortunately not, as we is still need 4 additional instructions or some 
sort of memory 
> barrier [ like mb() in Tru64 :) ] .

Well, x86 CPUs generally don't need memory barriers assuming the compiler
hasn't done something invalid, especially for opertions that are only on a 
single CPU.  However, if the compiler was broken presumably zfsboot would be 
broken everywhere.

-- 
John Baldwin