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Subject: Re: [ANNOUNCE][RFC][PATCH] Crash-utility, tracing: enable crash to
 analyze tracing from core-file (make tracing can act as a flight recorder)
From: Peter Zijlstra <peterz@infradead.org>
To: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Dave Anderson <anderson@redhat.com>, crash-utility@redhat.com,
       Ingo Molnar <mingo@elte.hu>, Frederic Weisbecker <fweisbec@gmail.com>,
       Thomas Gleixner <tglx@linutronix.de>,
       Arnaldo Carvalho de Melo <acme@ghostprotocols.net>,
       "Luis Claudio R. Goncalves" <lclaudio@uudg.org>,
       Clark Williams <clark.williams@gmail.com>,
       Jon Masters <jonathan@jonmasters.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>,
       Christoph Hellwig <hch@infradead.org>,
       Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>,
       Zhaolei <zhaolei@cn.fujitsu.com>, kosaki.motohiro@jp.fujitsu.com,
       Li Zefan <lizf@cn.fujitsu.com>, Masami Hiramatsu <mhiramat@redhat.com>,
       "Frank Ch. Eigler" <fche@redhat.com>, Tom Zanussi <tzanussi@gmail.com>,
       Jason Baron <jbaron@redhat.com>, srostedt@redhat.com,
       LKML <linux-kernel@vger.kernel.org>
In-Reply-To: <4A76F8A1.30503@cn.fujitsu.com>
References: <4A76F8A1.30503@cn.fujitsu.com>
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Date: Mon, 03 Aug 2009 17:42:16 +0200
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On Mon, 2009-08-03 at 22:48 +0800, Lai Jiangshan wrote:
> + /* SIGH, we cann't get "print fmt" from core-file */

doesn't crash have a vmlinux around to look at?

> +/*
> + * TODO: implement event_generic_print_fmt_print() when the print fmt
> + * in tracing/events/$SYSTEM/$TRACE/format becomes a will-defined
> + * language.
> + */

(well-defined)

That would require the running kernel to be the same as the one that
generated the core file -- not very usable imho.