linux-kernel - Re: [PATCH V4] kernel, add bug_on

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Message-ID: <544F97C4.8000203@redhat.com>
Date:	Tue, 28 Oct 2014 09:19:00 -0400
From:	Prarit Bhargava <prarit@...hat.com>
To:	Andi Kleen <ak@...ux.intel.com>
CC:	Vivek Goyal <vgoyal@...hat.com>, linux-kernel@...r.kernel.org,
	Jonathan Corbet <corbet@....net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"H. Peter Anvin" <hpa@...or.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Fabian Frederick <fabf@...net.be>,
	isimatu.yasuaki@...fujitsu.com, linux-doc@...r.kernel.org,
	kexec@...ts.infradead.org, linux-api@...r.kernel.org,
	jason.wessel@...driver.com
Subject: Re: [PATCH V4] kernel, add bug_on_warn



On 10/28/2014 08:56 AM, Andi Kleen wrote:
>>> If you have a command line option to execute kdb commands you still
>>> would only have a command line option, just a slightly longer one.
>>>
>>> kdb="on, bp warn_slowpath_common sr c, go" 
>>
>> KDB is not on all kernels.  This would require me to go to great lengths to
> 
> Repeating incorrect statements doesn't suddenly make them correct.

It does when you're introducing unnecessary complexity here Andi.  You're not
listening to the original statement: I do not want to provide a modified kernel
to an end user for this simple situation anymore.

> 
> Assuming KDB is compiled in the only setup needed would be the line above.

That's a HUGE assumption.  It isn't and I'm still stuck in the same mess of
explaining how to recompile a kernel and/or providing a modified kernel to an
end user.  That isn't a good solution.

P.

> 
> -Andi
> 
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