Subject: Re: [ANNOUNCE] Merkey's Kernel Debugger
From: Peter Zijlstra <peterz@infradead.org>
To: jmerkey@wolfmountaingroup.com
Cc: Andi Kleen <andi@firstfloor.org>,
       Jason Wessel <jason.wessel@windriver.com>,
       Nick Piggin <nickpiggin@yahoo.com.au>,
       Geert Uytterhoeven <geert@linux-m68k.org>,
       Stefan Richter <stefanr@s5r6.in-berlin.de>,
       Josh Boyer <jwboyer@gmail.com>, linux-kernel@vger.kernel.org
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Date: Thu, 07 Aug 2008 17:17:31 +0200
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On Thu, 2008-08-07 at 06:45 -0600, jmerkey@wolfmountaingroup.com wrote:

> Also, whoever wrote "/Documentation/volatiles_are_evil" must not have
> worked with the busted-ass GNU compiler that optimizes away global
> variables and busts SMP dependent code.  I am not going to remove the
> volatile declarations needed for SMP coordination in the debugger since
> the code breaks when removed.  GCC will cause massive breakage of SMP code
> if you do not declare certain variables as volatile.

Even with proper barrier() usage?


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