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Diffstat (limited to 'Documentation/trace/events.rst')
| -rw-r--r-- | Documentation/trace/events.rst | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/trace/events.rst b/Documentation/trace/events.rst index 15f78e772384..759907c20e75 100644 --- a/Documentation/trace/events.rst +++ b/Documentation/trace/events.rst @@ -219,6 +219,20 @@ the function "security_prepare_creds" and less than the end of that function. The ".function" postfix can only be attached to values of size long, and can only be compared with "==" or "!=". +Cpumask fields or scalar fields that encode a CPU number can be filtered using +a user-provided cpumask in cpulist format. The format is as follows:: + + CPUS{$cpulist} + +Operators available to cpumask filtering are: + +& (intersection), ==, != + +For example, this will filter events that have their .target_cpu field present +in the given cpumask:: + + target_cpu & CPUS{17-42} + 5.2 Setting filters ------------------- |