linux-kernel - Re: [ANNOUNCE][RFC][PATCH] Crash-utility, tracing: enable crash to analyze tracing from core-file (make tracing can act as a flight recorder)

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Message-ID: <4A7750DE.3090501@windriver.com>
Date:	Mon, 03 Aug 2009 16:04:30 -0500
From:	Jason Wessel <jason.wessel@...driver.com>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Christoph Hellwig <hch@...radead.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Dave Anderson <anderson@...hat.com>, crash-utility@...hat.com,
	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	"Luis Claudio R. Goncalves" <lclaudio@...g.org>,
	Clark Williams <clark.williams@...il.com>,
	Jon Masters <jonathan@...masters.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Xiao Guangrong <xiaoguangrong@...fujitsu.com>,
	Zhaolei <zhaolei@...fujitsu.com>, kosaki.motohiro@...fujitsu.com,
	Li Zefan <lizf@...fujitsu.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Tom Zanussi <tzanussi@...il.com>,
	Jason Baron <jbaron@...hat.com>, srostedt@...hat.com,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [ANNOUNCE][RFC][PATCH] Crash-utility, tracing: enable crash to
 analyze tracing from core-file (make tracing can act as a flight recorder)

Andi Kleen wrote:
> Jason Wessel <jason.wessel@...driver.com> writes:
>   
>> In no particular order, tracing, kernel probes, profiling data display,
>> kdump, disassembly and kernel mode setting were some of the pieces that
>> are on the wish list for integration with the kdb prototype.  Kernel
>> mode setting is presently the highest priority on the wish list for a
>> new feature.
>>     
>
> I suspect for a lot of people the highest priority issue would be
> a polled USB keybord driver. Or do you plan to use the one from
> old kdb (iirc it was pretty crufty)
>
>   

There is a working usb keyboard driver in the kdb prototype.  I am not
certain about the degree to which the driver is robust or not.  I had
added a uhci implementation to the kdb prototype because I had a uhci
keyboard which didn't work at all.  The kdb usb code is quite complex
and not necessarily the long term approach to the problem.  That means
that if you have a uchi, ehci or ohci port on your board and typical usb
keyboard it has at least the possibility of working.

All these sorts of issues require a good deal of testing and review, 
right now it is at the stage where somethings work, and having other
people contribute to the project would be highly desired.

Jason.
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