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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2012-11-05 08:48:29 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2012-11-16 13:12:13 +0100 |
| commit | 8f5a0fb1f4e3167b893e3a4272446e2cf1568058 (patch) | |
| tree | e3187b84bc6c75fb16bf930775b8920cdd761c4b /docs/tracing.txt | |
| parent | ddde8acc989d9e59b37605d438d5cb6b5ce8fbae (diff) | |
trace: document '-' syntax for disabling events
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'docs/tracing.txt')
| -rw-r--r-- | docs/tracing.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/docs/tracing.txt b/docs/tracing.txt index c541133368..79014093db 100644 --- a/docs/tracing.txt +++ b/docs/tracing.txt @@ -139,6 +139,10 @@ having a common prefix in a batch. For example, virtio-blk trace events could be enabled using: trace-event virtio_blk_* on +If a line in the "-trace events=<file>" file begins with a '-', the trace event +will be disabled instead of enabled. This is useful when a wildcard was used +to enable an entire family of events but one noisy event needs to be disabled. + == Trace backends == The "tracetool" script automates tedious trace event code generation and also |