linux-kernel - Re: [ANNOUNCE] Merkey's Kernel Debugger

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Date:	Thu, 07 Aug 2008 17:17:31 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	jmerkey@...fmountaingroup.com
Cc:	Andi Kleen <andi@...stfloor.org>,
	Jason Wessel <jason.wessel@...driver.com>,
	Nick Piggin <nickpiggin@...oo.com.au>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Stefan Richter <stefanr@...6.in-berlin.de>,
	Josh Boyer <jwboyer@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: [ANNOUNCE] Merkey's Kernel Debugger

On Thu, 2008-08-07 at 06:45 -0600, jmerkey@...fmountaingroup.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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