linux-kernel - Re: [PATCH] Revert "x86: optimize page faults like all other achitectures and kill notifier cruft"

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Message-Id: <200801091523.35845.ak@suse.de>
Date:	Wed, 9 Jan 2008 15:23:34 +0100
From:	Andi Kleen <ak@...e.de>
To:	David Miller <davem@...emloft.net>
Cc:	hch@....de, airlied@...ux.ie, akpm@...ux-foundation.org,
	torvalds@...ux-foundation.org, pq@....fi, jbeulich@...ell.com,
	mingo@...e.hu, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Revert "x86: optimize page faults like all other achitectures and kill notifier cruft"


> You can set a kprobe on the x86 fault handler to do things like
> mmiotrace.

That would mean that if the kprobe faults it goes into an endless loop.
Most of do_page_fault() is not really safe for kprobes.

-Andi

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