From: Steven Rostedt <rostedt@goodmis.org>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>, Ingo Molnar <mingo@elte.hu>,
Frederic Weisbecker <fweisbec@gmail.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] tracing/events: Add kexec tracepoints
Date: Tue, 08 Sep 2009 21:39:26 -0400 [thread overview]
Message-ID: <1252460366.11070.2.camel@gandalf.stny.rr.com> (raw)
In-Reply-To: <m1pra0hppp.fsf@fess.ebiederm.org>
On Tue, 2009-09-08 at 18:27 -0700, Eric W. Biederman wrote:
> Li Zefan <lizf@cn.fujitsu.com> writes:
>
> > When panic, save in ring buffer the time when crash happened,
> > the panic message, etc. And the data can be retrieved from
> > core dump file using flight-recorder, which is going to be a
> > module of the crash utility.
> >
> > Also if we implement flight-recorder in perf tool, those trace
> > outputs can be used by perf tool.
>
> Please let's keep dynamic code out of crash_kexec if we can.
What dynamic code? It's a tracepoint not something like the function
tracer. It is activated via a bit test and a jmp. Not very dynamic.
-- Steve
>
> If this is just about timestamsp I don't see the point.
next prev parent reply other threads:[~2009-09-09 1:39 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-09 1:15 [PATCH 1/2] tracing: Add sysctl to enable/disable tracing on oops Li Zefan
2009-09-09 1:15 ` [PATCH 2/2] tracing/events: Add kexec tracepoints Li Zefan
2009-09-09 1:20 ` Daniel Walker
2009-09-09 1:26 ` Li Zefan
2009-09-09 4:59 ` Daniel Walker
2009-09-09 11:46 ` Steven Rostedt
2009-09-09 14:12 ` Daniel Walker
2009-09-09 15:19 ` Steven Rostedt
2009-09-09 15:58 ` Daniel Walker
2009-09-09 1:27 ` Eric W. Biederman
2009-09-09 1:39 ` Steven Rostedt [this message]
2009-09-09 2:02 ` Eric W. Biederman
2009-09-09 1:34 ` [PATCH 1/2] tracing: Add sysctl to enable/disable tracing on oops Steven Rostedt
2009-09-09 1:37 ` Li Zefan
2009-09-09 1:42 ` Steven Rostedt
2009-09-09 1:47 ` Li Zefan
2009-09-09 2:04 ` Steven Rostedt
2009-09-09 2:33 ` KOSAKI Motohiro
2009-09-09 2:40 ` Li Zefan
2009-09-09 2:53 ` Steven Rostedt
2009-09-09 4:19 ` KOSAKI Motohiro
2009-09-09 11:48 ` Steven Rostedt
2009-09-09 3:01 ` KOSAKI Motohiro
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