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: <20090803151420.GA8712@infradead.org>
Date:	Mon, 3 Aug 2009 11:14:20 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Dave Anderson <anderson@...hat.com>, crash-utility@...hat.com,
	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	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>,
	Christoph Hellwig <hch@...radead.org>,
	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)

On Mon, Aug 03, 2009 at 10:48:01PM +0800, Lai Jiangshan wrote:
> 
> We use tracing subsystem very well when kernel is alive.
> But we also want to get help from tracing when kernel is core-dump.
> This patch is for this purpose. It makes tracing can act as a
> flight recorder, we can find what have happen from the events.

Nice!  Now the only thing missing is gettind kdb in mainline and a trace
reader in kdb ;-)

Any idea how easy it is to reuse the crash/gdb code for looking at crash
dumps through kgdb?

Btw, the Cc list here seems to be a very strong indicator that we
should have a linux-trace@...r list, I already noticed this for tons
of other tracing patches.

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