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-rw-r--r--Documentation/technical/api-trace2.txt5
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diff --git a/Documentation/technical/api-trace2.txt b/Documentation/technical/api-trace2.txt
index 2de565f..d0948ba 100644
--- a/Documentation/technical/api-trace2.txt
+++ b/Documentation/technical/api-trace2.txt
@@ -109,6 +109,11 @@ values are recognized.
Enables the target, opens and writes to the file in append mode.
+ If the target already exists and is a directory, the traces will be
+ written to files (one per process) underneath the given directory. They
+ will be named according to the last component of the SID (optionally
+ followed by a counter to avoid filename collisions).
+
`af_unix:[<socket_type>:]<absolute-pathname>`::
Enables the target, opens and writes to a Unix Domain Socket