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From: David Mosberger <davidm@napali.hpl.hp.com>
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Date: Fri, 29 Mar 2002 07:46:07 -0800
To: Christoph Hellwig <hch@infradead.org>
Cc: Marcelo Tosatti <marcelo@conectiva.com.br>,
        Andrew Morton <akpm@zip.com.au>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] generic show_stack facility
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>>>>> On Fri, 29 Mar 2002 15:23:14 +0000, Christoph Hellwig <hch@infradead.org> said:

  Christoph> This patch adds a prototype for show_stack to sched.h and
  Christoph> exports it.  Andrea's VM updates want this, as does Tux
  Christoph> and I think it's a facility we want to proive genericly.

  Christoph> Note that some architectures (e.g. ia64) have a
  Christoph> conflicting prototype and some (e.g. sparc) don't have
  Christoph> show_stack at all, but I think -pre5 is early enough in
  Christoph> the 2.4.19 cycle to let the maintainers fix it.

  Christoph> Could you apply the patch to your tree?

Please don't.  The patch is broken.

Christoph, why do you think the prototype for ia64 is different?  It's
because it *has to be*.  In general, you can't do a backtrace without
having the full (preserved) state of the CPU at the point of which the
backtrace begins.

	--david
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