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List:       git-commits-head
Subject:    tracing, doc: update mmiotrace documentation
From:       Linux Kernel Mailing List <linux-kernel () vger ! kernel ! org>
Date:       2008-11-30 22:00:22
Message-ID: 200811302200.mAUM0MRf003149 () hera ! kernel ! org
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Gitweb:     http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=fb91ee6cf5b8be5360acec577458e29ec7e97e5e
Commit:     fb91ee6cf5b8be5360acec577458e29ec7e97e5e
Parent:     7ee1768ddb3075ae3a0801cc2d0ea4195530a7db
Author:     Pekka Paalanen <pq@iki.fi>
AuthorDate: Sun Nov 23 21:24:59 2008 +0200
Committer:  Ingo Molnar <mingo@elte.hu>
CommitDate: Sun Nov 23 20:33:24 2008 +0100

    tracing, doc: update mmiotrace documentation
    
    Impact: update documentation
    
    Update to reflect the current state of the tracing framework:
    
     - "none" tracer has been replaced by "nop" tracer
     - tracing_enabled must be toggled when changing buffer size
    
    Signed-off-by: Pekka Paalanen <pq@iki.fi>
    Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
 Documentation/tracers/mmiotrace.txt |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/Documentation/tracers/mmiotrace.txt b/Documentation/tracers/mmiotrace.txt
index 5bbbe20..cde23b4 100644
--- a/Documentation/tracers/mmiotrace.txt
+++ b/Documentation/tracers/mmiotrace.txt
@@ -37,7 +37,7 @@ $ echo mmiotrace > /debug/tracing/current_tracer
 $ cat /debug/tracing/trace_pipe > mydump.txt &
 Start X or whatever.
 $ echo "X is up" > /debug/tracing/trace_marker
-$ echo none > /debug/tracing/current_tracer
+$ echo nop > /debug/tracing/current_tracer
 Check for lost events.
 
 
@@ -66,7 +66,7 @@ which action. It is recommended to place descriptive markers about what you
 do.
 
 Shut down mmiotrace (requires root privileges):
-$ echo none > /debug/tracing/current_tracer
+$ echo nop > /debug/tracing/current_tracer
 The 'cat' process exits. If it does not, kill it by issuing 'fg' command and
 pressing ctrl+c.
 
@@ -81,7 +81,9 @@ are:
 $ cat /debug/tracing/trace_entries
 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
 Then start again from the top.
 
 If you are doing a trace for a driver project, e.g. Nouveau, you should also
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