From: Li Zefan <lizf@cn.fujitsu.com>
To: rostedt@goodmis.org
Cc: Ingo Molnar <mingo@elte.hu>,
Frederic Weisbecker <fweisbec@gmail.com>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 1/2] tracing: Add sysctl to enable/disable tracing on oops
Date: Wed, 09 Sep 2009 09:47:24 +0800 [thread overview]
Message-ID: <4AA7092C.4070706@cn.fujitsu.com> (raw)
In-Reply-To: <1252460523.11070.3.camel@gandalf.stny.rr.com>
Steven Rostedt wrote:
> On Wed, 2009-09-09 at 09:37 +0800, Li Zefan wrote:
>> Steven Rostedt wrote:
>>> On Wed, 2009-09-09 at 09:15 +0800, Li Zefan wrote:
>>>> Currently we always disable tracing on oops, and this patch
>>>> adds a sysctl so one can choose to enable it.
>>> Hmm, we already have a way to enable it.
>>>
>>> # echo 1 > /debug/tracing/tracing_on
>>>
>> What I want is a way to not disable it when an oops happened. :)
>>
>
> Ah, I misunderstood. May I ask a silly question?
>
> Why?
>
Otherwise we won't get trace output from trae_crash_kexec if
crash_kexec() is not called by panic(). For example:
oops_begin()
->trace_off()
->panic_on_oops
->kexec_should_crash()
->crash_kexec()
next prev parent reply other threads:[~2009-09-09 1:48 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
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 [this message]
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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