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Tracing docs fix configure option and description

Message ID 1412691161-31785-1-git-send-email-dgilbert@redhat.com
State New
Headers show

Commit Message

Dr. David Alan Gilbert Oct. 7, 2014, 2:12 p.m. UTC 
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Fix the example trace configure option.
Update the text to say that multiple backends are allowed and what
happens when multiple backends are enabled.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 docs/tracing.txt | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

Comments

Stefan Hajnoczi Oct. 22, 2014, 10:12 a.m. UTC | #1 
On Tue, Oct 07, 2014 at 03:12:41PM +0100, Dr. David Alan Gilbert (git) wrote:
> From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
> 
> Fix the example trace configure option.
> Update the text to say that multiple backends are allowed and what
> happens when multiple backends are enabled.
> 
> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
>  docs/tracing.txt | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)

Thanks, applied to my tracing tree:
https://github.com/stefanha/qemu/commits/tracing

Stefan
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Patch

diff --git a/docs/tracing.txt b/docs/tracing.txt
index 7d38926..7117c5e 100644
--- a/docs/tracing.txt
+++ b/docs/tracing.txt
@@ -139,12 +139,12 @@  events are not tightly coupled to a specific trace backend, such as LTTng or
 SystemTap.  Support for trace backends can be added by extending the "tracetool"
 script.
 
-The trace backend is chosen at configure time and only one trace backend can
-be built into the binary:
+The trace backends are chosen at configure time:
 
-    ./configure --trace-backends=simple
+    ./configure --enable-trace-backends=simple
 
 For a list of supported trace backends, try ./configure --help or see below.
+If multiple backends are enabled, the trace is sent to them all.
 
 The following subsections describe the supported trace backends.