[PATCH] doc: update mmiotrace.txt

From: Pekka Paalanen
Date: Sat Jan 03 2009 - 14:09:27 EST


The tracing framework buffer size file in debugfs has changed.

Signed-off-by: Pekka Paalanen <pq@xxxxxx>
---

Ingo, I'm hoping these three patches would make it into .29.
Thanks.

Documentation/tracers/mmiotrace.txt | 6 ++----
1 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/Documentation/tracers/mmiotrace.txt b/Documentation/tracers/mmiotrace.txt
index cde23b4..5731c67 100644
--- a/Documentation/tracers/mmiotrace.txt
+++ b/Documentation/tracers/mmiotrace.txt
@@ -78,12 +78,10 @@ to view your kernel log and look for "mmiotrace has lost events" warning. If
events were lost, the trace is incomplete. You should enlarge the buffers and
try again. Buffers are enlarged by first seeing how large the current buffers
are:
-$ cat /debug/tracing/trace_entries
+$ cat /debug/tracing/buffer_size_kb
gives you a number. Approximately double this number and write it back, for
instance:
-$ echo 0 > /debug/tracing/tracing_enabled
-$ echo 128000 > /debug/tracing/trace_entries
-$ echo 1 > /debug/tracing/tracing_enabled
+$ echo 128000 > /debug/tracing/buffer_size_kb
Then start again from the top.

If you are doing a trace for a driver project, e.g. Nouveau, you should also
--
1.6.0.6

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