linux-kernel - Re: [RFC PATCH -tip 00/16] in-kernel x86 disassember

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Message-ID: <4F7B20F7.6090306@zytor.com>
Date:	Tue, 03 Apr 2012 09:10:31 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ingo Molnar <mingo@...nel.org>
CC:	Masami Hiramatsu <masami.hiramatsu@...il.com>,
	linux-kernel@...r.kernel.org, Huang Ying <ying.huang@...el.com>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Jason Wessel <jason.wessel@...driver.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [RFC PATCH -tip 00/16] in-kernel x86 disassember

On 04/03/2012 12:31 AM, Ingo Molnar wrote:
> 
> The existing oops setup knob is an early_param() in 
> kernel/panic.c, "oops=".
> 
> I'd suggesting extending that in an obvious way. Currently the 
> only option that exists is "oops=panic", so a comma delimited 
> list of attributes would be the natural extension, allowing:
> 
> 	oops=panic
> 	oops=panic,disasm
> 	oops=disasm
> 
> Detail: it should do a strncmp(5, str, "disas"), so that every 
> usual variant works: oops=disasm, oops=disassemble, etc.
> 
>> [...]  In other words, if *you* are debugging your own kernel, 
>> and don't expect to ship oopses off to someone else.
> 
> Probably a DEBUG .config option as well, so that distros can 
> enable it. OTOH, CONFIG_CMDLINE allows the setting of such 
> parameters as well.
> 

I would say there should be a CONFIG option to build it in, but I'd like
to see an explicit command-line option to enable it.

I *do not* want to see this in distro kernels.  That is all downside.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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