linux-kernel - [PATCH 2/3] trace-cmd: don't call stop

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Date:	Thu, 5 Apr 2012 15:19:45 -0400
From:	Mark Asselstine <mark.asselstine@...driver.com>
To:	<rostedt@...dmis.org>
CC:	<linux-kernel@...r.kernel.org>, <mark.asselstine@...driver.com>
Subject: [PATCH 2/3] trace-cmd: don't call stop_threads() if doing latency tracing

If we are using a latency tracer we do not call start_threads() we
should therefore not call stop_threads() if 'latency'. Attempting
to call stop_threads() without first calling start_threads() will
cause a segfault since pids will be uninitialized.

Signed-off-by: Mark Asselstine <mark.asselstine@...driver.com>
---
 trace-record.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/trace-record.c b/trace-record.c
index fcec28b..1c56fa9 100644
--- a/trace-record.c
+++ b/trace-record.c
@@ -2216,7 +2216,8 @@ void trace_record (int argc, char **argv)
 		}
 
 		disable_tracing();
-		stop_threads();
+		if (!latency)
+			stop_threads();
 	}
 
 	for (cpu = 0; cpu < cpu_count; cpu++) {
-- 
1.7.5.4

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