linux-kernel - Re: x86: Add the "print code before the trapping instruction" feature to 64 bit

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Date:	Thu, 10 Jan 2008 14:54:55 -0500
From:	Chuck Ebbert <cebbert@...hat.com>
To:	Arjan van de Ven <arjan@...radead.org>
CC:	linux-kernel@...r.kernel.org, mingo@...e.hu
Subject: Re: x86: Add the "print code before the trapping instruction" feature
 to 64 bit

On 01/10/2008 11:47 AM, Arjan van de Ven wrote:
> Subject: x86: Add the "print code before the trapping instruction" feature to 64 bit
> From: Arjan van de Ven <arjan@...ux.intel.com>
> 
> The 32 bit x86 tree has a very useful feature that prints the Code: line
> for the code even before the trapping instrution (and the start of the
> trapping instruction is then denoted with a <>). Unfortunately, the 64 bit
> x86 tree does not yet have this feature, making diagnosing backtraces harder
> than needed.
> 
> This patch adds this feature in the same was as the 32 bit tree has
> (including the same kernel boot parameter), and including a bugfix
> to make the code use probe_kernel_address() rarther than a buggy (deadlocking)
> __get_user.
> 

If this get accepted I can stop ignoring x86_64 oops reports...

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