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| -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 |