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From: Blaisorblade <blaisorblade_spam@yahoo.it>
To: user-mode-linux-devel@lists.sourceforge.net
Subject: Re: [uml-devel] [PATCH 2/2] UML - Add stack usage monitoring
Date: Wed, 20 Jun 2007 22:20:15 +0200
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Cc: Jeff Dike <jdike@addtoit.com>, Andrew Morton <akpm@linux-foundation.org>,
       LKML <linux-kernel@vger.kernel.org>
References: <20070619184245.GA10567@c2.user-mode-linux.org> <200706201606.58331.blaisorblade@yahoo.it> <20070620151753.GA6728@c2.user-mode-linux.org>
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On mercoled? 20 giugno 2007, Jeff Dike wrote:
> On Wed, Jun 20, 2007 at 04:06:58PM +0200, Blaisorblade wrote:
> > Oh, it's exactly what CONFIG_DEBUG_STACK_USAGE does for i386... (not sure
> > if you were still wondering...).
>
> Where?  The only usage in i386 that I see is thread_info.h zeroing stacks
> as they are allocated.

I only looked at docs. But Andrew Morton said:

"Your new code should really be generic, utilising the
stack-page-zeroing which CONFIG_DEBUG_STACK_USAGE enables."

In fact, the other reference is in kernel/sched.c. You may (or may not) join 
the two stack walking (I would) and match a bit descriptions.

Personally, I'd put the Kconfig option in lib/Kconfig.debug and have a Kconfig 
flag named DEBUG_STACK_USAGE_SUPPORT, much like LOCKDEP_SUPPORT (defined only 
by architectures supporting the option), but have no time right now.

Bye
-- 
Inform me of my mistakes, so I can add them to my list!
Paolo Giarrusso, aka Blaisorblade
http://www.user-mode-linux.org/~blaisorblade
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