linux-kernel - [PATCH 2/3] tracing: Fix initial buffer_size

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Date:	Sat, 19 May 2012 09:35:53 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	linux-kernel@...r.kernel.org
Cc:	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...hat.com>,
	Laurent Chavey <chavey@...gle.com>,
	Justin Teravest <teravest@...gle.com>,
	David Sharp <dhsharp@...gle.com>,
	Vaibhav Nagarnaik <vnagarnaik@...gle.com>
Subject: [PATCH 2/3] tracing: Fix initial buffer_size_kb state

From: Vaibhav Nagarnaik <vnagarnaik@...gle.com>

Make sure that the state of buffer_size_kb is initialized correctly and
returns actual size of the ring buffer.

Link: http://lkml.kernel.org/r/1336066834-1673-1-git-send-email-vnagarnaik@google.com

Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Laurent Chavey <chavey@...gle.com>
Cc: Justin Teravest <teravest@...gle.com>
Cc: David Sharp <dhsharp@...gle.com>
Signed-off-by: Vaibhav Nagarnaik <vnagarnaik@...gle.com>
Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
---
 kernel/trace/trace.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 08a08ba..a44d4c6 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -5112,7 +5112,8 @@ __init static int tracer_alloc_buffers(void)
 		max_tr.data[i] = &per_cpu(max_tr_data, i);
 	}
 
-	set_buffer_entries(&global_trace, ring_buf_size);
+	set_buffer_entries(&global_trace,
+			   ring_buffer_size(global_trace.buffer, 0));
 #ifdef CONFIG_TRACER_MAX_TRACE
 	set_buffer_entries(&max_tr, 1);
 #endif
-- 
1.7.10



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