linux-kernel - Re: PATCH] debug: add notifier chain debugging

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Date:	Sat, 16 Aug 2008 00:53:56 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: PATCH] debug: add notifier chain debugging


* Arjan van de Ven <arjan@...radead.org> wrote:

> From: Arjan van de Ven <arjan@...ux.intel.com>
> Subject: [PATCH] debug: add notifier chain debugging
> 
> during some development we suspected a case where we left something in 
> a notifier chain that was from a module that was unloaded already... 
> and that sort of thing is rather hard to track down.
> 
> This patch adds a very simple sanity check (which isn't all that 
> expensive) to make sure the notifier we're about to call is actually 
> from either the kernel itself of from a still-loaded module, avoiding 
> a hard-to-chase-down crash.

applied for testing, thanks Arjan.

	Ingo
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