linux-kernel - [PATCH][GIT PULL] trace: stop tracer in oops

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Date:	Fri, 24 Jul 2009 15:35:37 -0400 (EDT)
From:	Steven Rostedt <rostedt@...dmis.org>
To:	LKML <linux-kernel@...r.kernel.org>
cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH][GIT PULL] trace: stop tracer in oops_enter()


Ingo or Thomas,

This is on top of the previous pull requests I made for 31.

Please pull the latest tip/tracing/urgent-2 tree, which can be found at:

  git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace.git
tip/tracing/urgent-2


Thomas Gleixner (1):
      trace: stop tracer in oops_enter()

----
 kernel/panic.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---------------------------
commit bdff78707f3ce47e891f3201c9666122a70556ce
Author: Thomas Gleixner <tglx@...utronix.de>
Date:   Fri Jul 24 15:30:45 2009 -0400

    trace: stop tracer in oops_enter()
    
    If trace_printk_on_oops is set we lose interesting trace information
    when the tracer is enabled across oops handling and printing. We want
    the trace which might give us information _WHY_ we oopsed.
    
    Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
    Signed-off-by: Steven Rostedt <rostedt@...dmis.org>

diff --git a/kernel/panic.c b/kernel/panic.c
index 984b3ec..512ab73 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -301,6 +301,7 @@ int oops_may_print(void)
  */
 void oops_enter(void)
 {
+	tracing_off();
 	/* can't trust the integrity of the kernel anymore: */
 	debug_locks_off();
 	do_oops_enter_exit();

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